/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Copyright by The HDF Group. * * Copyright by the Board of Trustees of the University of Illinois. * * All rights reserved. * * * * This file is part of HDF5. The full HDF5 copyright notice, including * * terms governing use, modification, and redistribution, is contained in * * the files COPYING and Copyright.html. COPYING can be found at the root * * of the source code distribution tree; Copyright.html can be found at the * * root level of an installed copy of the electronic HDF5 document set and * * is linked from the top-level documents page. It can also be found at * * http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have * * access to either file, you may request a copy from help@hdfgroup.org. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ #define H5F_PACKAGE /*suppress error about including H5Fpkg */ /* Interface initialization */ #define H5_INTERFACE_INIT_FUNC H5F_init_interface /* Packages needed by this file... */ #include "H5private.h" /* Generic Functions */ #include "H5Aprivate.h" /* Attributes */ #include "H5ACprivate.h" /* Metadata cache */ #include "H5Dprivate.h" /* Datasets */ #include "H5Eprivate.h" /* Error handling */ #include "H5Fpkg.h" /* File access */ #include "H5FDprivate.h" /* File drivers */ #include "H5Gprivate.h" /* Groups */ #include "H5Iprivate.h" /* IDs */ #include "H5MFprivate.h" /* File memory management */ #include "H5MMprivate.h" /* Memory management */ #include "H5Pprivate.h" /* Property lists */ #include "H5SMprivate.h" /* Shared Object Header Messages */ #include "H5Tprivate.h" /* Datatypes */ /* Predefined file drivers */ #include "H5FDcore.h" /*temporary in-memory files */ #include "H5FDfamily.h" /*family of files */ #include "H5FDlog.h" /* sec2 driver with logging, for debugging */ #include "H5FDmpi.h" /* MPI-based file drivers */ #include "H5FDmulti.h" /*multiple files partitioned by mem usage */ #include "H5FDsec2.h" /*Posix unbuffered I/O */ #include "H5FDstdio.h" /* Standard C buffered I/O */ #ifdef H5_HAVE_WINDOWS #include "H5FDwindows.h" /* Windows buffered I/O */ #endif #include "H5FDdirect.h" /*Linux direct I/O */ /* Struct only used by functions H5F_get_objects and H5F_get_objects_cb */ typedef struct H5F_olist_t { H5I_type_t obj_type; /* Type of object to look for */ hid_t *obj_id_list; /* Pointer to the list of open IDs to return */ size_t *obj_id_count; /* Number of open IDs */ struct { hbool_t local; /* Set flag for "local" file searches */ union { H5F_file_t *shared; /* Pointer to shared file to look inside */ const H5F_t *file; /* Pointer to file to look inside */ } ptr; } file_info; size_t list_index; /* Current index in open ID array */ size_t max_index; /* Maximum # of IDs to put into array */ } H5F_olist_t; /* PRIVATE PROTOTYPES */ static size_t H5F_get_objects(const H5F_t *f, unsigned types, size_t max_objs, hid_t *obj_id_list, hbool_t app_ref); static int H5F_get_objects_cb(void *obj_ptr, hid_t obj_id, void *key); static herr_t H5F_get_vfd_handle(const H5F_t *file, hid_t fapl, void** file_handle); static H5F_t *H5F_new(H5F_file_t *shared, hid_t fcpl_id, hid_t fapl_id, H5FD_t *lf); static herr_t H5F_dest(H5F_t *f, hid_t dxpl_id); static herr_t H5F_close(H5F_t *f); /* Declare a free list to manage the H5F_t struct */ H5FL_DEFINE(H5F_t); /* Declare a free list to manage the H5F_file_t struct */ H5FL_DEFINE(H5F_file_t); /*------------------------------------------------------------------------- * Function: H5F_init * * Purpose: Initialize the interface from some other layer. * * Return: Success: non-negative * Failure: negative * * Programmer: Robb Matzke * Wednesday, December 16, 1998 * *------------------------------------------------------------------------- */ herr_t H5F_init(void) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(H5F_init, FAIL) /* FUNC_ENTER() does all the work */ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5F_init() */ /*------------------------------------------------------------------------- * Function: H5F_init_interface * * Purpose: Initialize interface-specific information. * * Return: Success: non-negative * Failure: negative * * Programmer: Robb Matzke * Friday, November 20, 1998 * *------------------------------------------------------------------------- */ static herr_t H5F_init_interface(void) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5F_init_interface) /* * Initialize the atom group for the file IDs. */ if(H5I_register_type(H5I_FILE, (size_t)H5I_FILEID_HASHSIZE, 0, (H5I_free_t)H5F_close)shared->fcpl_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list") /* Create the property list object to return */ if((ret_value = H5P_copy_plist(plist, TRUE)) < 0) HGOTO_ERROR(H5E_INTERNAL, H5E_CANTINIT, FAIL, "unable to copy file creation properties") done: FUNC_LEAVE_API(ret_value) } /* end H5Fget_create_plist() */ /*------------------------------------------------------------------------- * Function: H5Fget_access_plist * * Purpose: Returns a copy of the file access property list of the * specified file. * * NOTE: Make sure that, if you are going to overwrite * information in the copied property list that was * previously opened and assigned to the property list, then * you must close it before overwriting the values. * * Return: Success: Object ID for a copy of the file access * property list. * * Failure: FAIL * * Programmer: Robb Matzke * Wednesday, February 18, 1998 * *------------------------------------------------------------------------- */ hid_t H5Fget_access_plist(hid_t file_id) { H5F_t *f; /* File info */ hid_t ret_value; /* Return value */ FUNC_ENTER_API(H5Fget_access_plist, FAIL) H5TRACE1("i", "i", file_id); /* Check args */ if(NULL == (f = (H5F_t *)H5I_object_verify(file_id, H5I_FILE))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file") /* Retrieve the file's access property list */ if((ret_value = H5F_get_access_plist(f, TRUE)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get file access property list") done: FUNC_LEAVE_API(ret_value) } /* end H5Fget_access_plist() */ /*------------------------------------------------------------------------- * Function: H5F_get_access_plist * * Purpose: Returns a copy of the file access property list of the * specified file. * * NOTE: Make sure that, if you are going to overwrite * information in the copied property list that was * previously opened and assigned to the property list, then * you must close it before overwriting the values. * * Return: Success: Object ID for a copy of the file access * property list. * * Failure: FAIL * * Programmer: Quincey Koziol * Wednesday, May 25, 2005 * * Modifications: * *------------------------------------------------------------------------- */ hid_t H5F_get_access_plist(H5F_t *f, hbool_t app_ref) { H5P_genplist_t *new_plist; /* New property list */ H5P_genplist_t *old_plist; /* Old property list */ void *driver_info=NULL; hid_t ret_value = SUCCEED; FUNC_ENTER_NOAPI(H5F_get_access_plist, FAIL) /* Check args */ HDassert(f); /* Make a copy of the default file access property list */ if(NULL == (old_plist = (H5P_genplist_t *)H5I_object(H5P_LST_FILE_ACCESS_g))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list") if((ret_value = H5P_copy_plist(old_plist, app_ref)) < 0) HGOTO_ERROR(H5E_INTERNAL, H5E_CANTINIT, FAIL, "can't copy file access property list") if(NULL == (new_plist = (H5P_genplist_t *)H5I_object(ret_value))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list") /* Copy properties of the file access property list */ if(H5P_set(new_plist, H5F_ACS_META_CACHE_INIT_CONFIG_NAME, &(f->shared->mdc_initCacheCfg)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set initial metadata cache resize config.") if(H5P_set(new_plist, H5F_ACS_DATA_CACHE_NUM_SLOTS_NAME, &(f->shared->rdcc_nslots)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set data cache number of slots") if(H5P_set(new_plist, H5F_ACS_DATA_CACHE_BYTE_SIZE_NAME, &(f->shared->rdcc_nbytes)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set data cache byte size") if(H5P_set(new_plist, H5F_ACS_PREEMPT_READ_CHUNKS_NAME, &(f->shared->rdcc_w0)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set preempt read chunks") if(H5P_set(new_plist, H5F_ACS_ALIGN_THRHD_NAME, &(f->shared->threshold)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set alignment threshold") if(H5P_set(new_plist, H5F_ACS_ALIGN_NAME, &(f->shared->alignment)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set alignment") if(H5P_set(new_plist, H5F_ACS_GARBG_COLCT_REF_NAME, &(f->shared->gc_ref)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set garbage collect reference") if(H5P_set(new_plist, H5F_ACS_META_BLOCK_SIZE_NAME, &(f->shared->meta_aggr.alloc_size)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set metadata cache size") if(H5P_set(new_plist, H5F_ACS_SIEVE_BUF_SIZE_NAME, &(f->shared->sieve_buf_size)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't sieve buffer size") if(H5P_set(new_plist, H5F_ACS_SDATA_BLOCK_SIZE_NAME, &(f->shared->sdata_aggr.alloc_size)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set 'small data' cache size") if(H5P_set(new_plist, H5F_ACS_LATEST_FORMAT_NAME, &(f->shared->latest_format)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set 'latest format' flag") /* * Since we're resetting the driver ID and info, close them if they * exist in this new property list. */ if(H5P_facc_close(ret_value, NULL) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTFREE, FAIL, "can't free the old driver information") /* Increment the reference count on the driver ID and insert it into the property list */ if(H5I_inc_ref(f->shared->lf->driver_id, FALSE) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTINC, FAIL, "unable to increment ref count on VFL driver") if(H5P_set(new_plist, H5F_ACS_FILE_DRV_ID_NAME, &(f->shared->lf->driver_id)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set file driver ID") /* Set the driver "info" in the property list */ driver_info = H5FD_fapl_get(f->shared->lf); if(driver_info != NULL && H5P_set(new_plist, H5F_ACS_FILE_DRV_INFO_NAME, &driver_info) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set file driver info") /* Set the file close degree appropriately */ if(f->shared->fc_degree == H5F_CLOSE_DEFAULT && H5P_set(new_plist, H5F_ACS_CLOSE_DEGREE_NAME, &(f->shared->lf->cls->fc_degree)) < 0) { HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set file close degree") } else if(f->shared->fc_degree != H5F_CLOSE_DEFAULT && H5P_set(new_plist, H5F_ACS_CLOSE_DEGREE_NAME, &(f->shared->fc_degree)) < 0) { HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set file close degree") } done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5F_get_access_plist() */ /*------------------------------------------------------------------------- * Function: H5Fget_obj_count * * Purpose: Public function returning the number of opened object IDs * (files, datasets, groups and datatypes) in the same file. * * Return: Non-negative on success; negative on failure. * * Programmer: Raymond Lu * Wednesday, Dec 5, 2001 * Modification: * Raymond Lu * 24 September 2008 * Changed the return value to ssize_t to accommadate * potential large number of objects. * *------------------------------------------------------------------------- */ ssize_t H5Fget_obj_count(hid_t file_id, unsigned types) { H5F_t *f = NULL; /* File to query */ ssize_t ret_value; /* Return value */ FUNC_ENTER_API(H5Fget_obj_count, FAIL) H5TRACE2("Zs", "iIu", file_id, types); if(file_id != (hid_t)H5F_OBJ_ALL && (NULL == (f = (H5F_t *)H5I_object_verify(file_id, H5I_FILE)))) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file id") if(0 == (types & H5F_OBJ_ALL)) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not an object type") /* H5F_get_obj_count doesn't fail */ ret_value = (ssize_t)H5F_get_obj_count(f, types, TRUE); done: FUNC_LEAVE_API(ret_value) } /* end H5Fget_obj_count() */ /*------------------------------------------------------------------------- * Function: H5F_get_obj_count * * Purpose: Private function return the number of opened object IDs * (files, datasets, groups, datatypes) in the same file. * * Return: Non-negative on success; can't fail. * * Programmer: Raymond Lu * Wednesday, Dec 5, 2001 * * Modification: * Raymond Lu * 24 September 2008 * Changed the return value to size_t to accommadate * potential large number of objects. * *------------------------------------------------------------------------- */ size_t H5F_get_obj_count(const H5F_t *f, unsigned types, hbool_t app_ref) { size_t ret_value; /* Return value */ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5F_get_obj_count) /* H5F_get_objects doesn't fail */ ret_value = H5F_get_objects(f, types, 0, NULL, app_ref); FUNC_LEAVE_NOAPI(ret_value) } /*------------------------------------------------------------------------- * Function: H5Fget_object_ids * * Purpose: Public function to return a list of opened object IDs. * * Return: Non-negative on success; negative on failure. * * Programmer: Raymond Lu * Wednesday, Dec 5, 2001 * * Modification: * Raymond Lu * 24 September 2008 * Changed the return value to ssize_t and MAX_OBJTS to size_t to * accommadate potential large number of objects. * *------------------------------------------------------------------------- */ ssize_t H5Fget_obj_ids(hid_t file_id, unsigned types, size_t max_objs, hid_t *oid_list) { H5F_t *f = NULL; /* File to query */ ssize_t ret_value; /* Return value */ FUNC_ENTER_API(H5Fget_obj_ids, FAIL) H5TRACE4("Zs", "iIuz*i", file_id, types, max_objs, oid_list); if(file_id != (hid_t)H5F_OBJ_ALL && (NULL == (f = (H5F_t *)H5I_object_verify(file_id, H5I_FILE)))) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file id") if(0 == (types & H5F_OBJ_ALL)) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not an object type") HDassert(oid_list); /* H5F_get_objects doesn't fail */ ret_value = (ssize_t)H5F_get_obj_ids(f, types, max_objs, oid_list, TRUE); done: FUNC_LEAVE_API(ret_value) } /* end H5Fget_obj_ids() */ /*------------------------------------------------------------------------- * Function: H5F_get_obj_ids * * Purpose: Private function to return a list of opened object IDs. * * Return: Non-negative on success; can't fail. * * Programmer: Raymond Lu * Wednesday, Dec 5, 2001 * * Modification: * Raymond Lu * 24 September 2008 * Changed the return value and MAX_OBJTS to size_t to accommadate * potential large number of objects. * *------------------------------------------------------------------------- */ size_t H5F_get_obj_ids(const H5F_t *f, unsigned types, size_t max_objs, hid_t *oid_list, hbool_t app_ref) { size_t ret_value; /* Return value */ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5F_get_obj_ids) /* H5F_get_objects doesn't fail */ ret_value = H5F_get_objects(f, types, max_objs, oid_list, app_ref); FUNC_LEAVE_NOAPI(ret_value) } /*--------------------------------------------------------------------------- * Function: H5F_get_objects * * Purpose: This function is called by H5F_get_obj_count or * H5F_get_obj_ids to get number of object IDs and/or a * list of opened object IDs (in return value). * Return: Non-negative on success; Can't fail. * * Programmer: Raymond Lu * Wednesday, Dec 5, 2001 * *--------------------------------------------------------------------------- */ static size_t H5F_get_objects(const H5F_t *f, unsigned types, size_t max_index, hid_t *obj_id_list, hbool_t app_ref) { size_t obj_id_count=0; /* Number of open IDs */ H5F_olist_t olist; /* Structure to hold search results */ size_t ret_value; /* Return value */ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5F_get_objects) /* Set up search information */ olist.obj_id_list = (max_index==0 ? NULL : obj_id_list); olist.obj_id_count = &obj_id_count; olist.list_index = 0; olist.max_index = max_index; /* Determine if we are searching for local or global objects */ if(types & H5F_OBJ_LOCAL) { olist.file_info.local = TRUE; olist.file_info.ptr.file = f; } /* end if */ else { olist.file_info.local = FALSE; olist.file_info.ptr.shared = f ? f->shared : NULL; } /* end else */ /* Search through file IDs to count the number, and put their * IDs on the object list. H5I_search returns NULL if no object * is found, so don't return failure in this function. */ if(types & H5F_OBJ_FILE) { olist.obj_type = H5I_FILE; (void)H5I_search(H5I_FILE, H5F_get_objects_cb, &olist, app_ref); } /* end if */ /* Search through dataset IDs to count number of datasets, and put their * IDs on the object list */ if(types & H5F_OBJ_DATASET) { olist.obj_type = H5I_DATASET; (void)H5I_search(H5I_DATASET, H5F_get_objects_cb, &olist, app_ref); } /* Search through group IDs to count number of groups, and put their * IDs on the object list */ if(types & H5F_OBJ_GROUP) { olist.obj_type = H5I_GROUP; (void)H5I_search(H5I_GROUP, H5F_get_objects_cb, &olist, app_ref); } /* Search through datatype IDs to count number of named datatypes, and put their * IDs on the object list */ if(types & H5F_OBJ_DATATYPE) { olist.obj_type = H5I_DATATYPE; (void)H5I_search(H5I_DATATYPE, H5F_get_objects_cb, &olist, app_ref); } /* Search through attribute IDs to count number of attributes, and put their * IDs on the object list */ if(types & H5F_OBJ_ATTR) { olist.obj_type = H5I_ATTR; (void)H5I_search(H5I_ATTR, H5F_get_objects_cb, &olist, app_ref); } /* Set the number of objects currently open */ ret_value = obj_id_count; FUNC_LEAVE_NOAPI(ret_value) } /* end H5F_get_objects() */ /*------------------------------------------------------------------------- * Function: H5F_get_objects_cb * * Purpose: H5F_get_objects' callback function. It verifies if an * object is in the file, and either count it or put its ID * on the list. * * Return: TRUE if the array of object IDs is filled up. * FALSE otherwise. * * Programmer: Raymond Lu * Wednesday, Dec 5, 2001 * * Modification: * *------------------------------------------------------------------------- */ static int H5F_get_objects_cb(void *obj_ptr, hid_t obj_id, void *key) { H5F_olist_t *olist = (H5F_olist_t *)key; /* Alias for search info */ int ret_value = FALSE; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5F_get_objects_cb) HDassert(obj_ptr); HDassert(olist); /* Count file IDs */ if(olist->obj_type == H5I_FILE) { if((olist->file_info.local && (!olist->file_info.ptr.file || (olist->file_info.ptr.file && (H5F_t*)obj_ptr == olist->file_info.ptr.file) )) || (!olist->file_info.local && ( !olist->file_info.ptr.shared || (olist->file_info.ptr.shared && ((H5F_t*)obj_ptr)->shared == olist->file_info.ptr.shared) ))) { /* Add the object's ID to the ID list, if appropriate */ if(olist->obj_id_list) { olist->obj_id_list[olist->list_index] = obj_id; olist->list_index++; } /* Increment the number of open objects */ if(olist->obj_id_count) (*olist->obj_id_count)++; /* Check if we've filled up the array. Return TRUE only if * we have filled up the array. Otherwise return FALSE(RET_VALUE is * preset to FALSE) because H5I_search needs the return value of FALSE * to continue searching. */ if(olist->max_index>0 && olist->list_index>=olist->max_index) HGOTO_DONE(TRUE) /* Indicate that the iterator should stop */ } } /* end if */ else { /* either count opened object IDs or put the IDs on the list */ H5O_loc_t *oloc; /* Group entry info for object */ switch(olist->obj_type) { case H5I_ATTR: oloc = H5A_oloc((H5A_t *)obj_ptr); break; case H5I_GROUP: oloc = H5G_oloc((H5G_t *)obj_ptr); break; case H5I_DATASET: oloc = H5D_oloc((H5D_t *)obj_ptr); break; case H5I_DATATYPE: if(H5T_is_named((H5T_t*)obj_ptr)==TRUE) oloc = H5T_oloc((H5T_t*)obj_ptr); else oloc = NULL; break; default: HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "unknown data object") } /* end switch */ if((olist->file_info.local && ( (!olist->file_info.ptr.file && olist->obj_type == H5I_DATATYPE && H5T_is_immutable((H5T_t *)obj_ptr) == FALSE) || (!olist->file_info.ptr.file && olist->obj_type != H5I_DATATYPE) || (oloc && oloc->file == olist->file_info.ptr.file))) || (!olist->file_info.local && ((!olist->file_info.ptr.shared && olist->obj_type == H5I_DATATYPE && H5T_is_immutable((H5T_t *)obj_ptr) == FALSE) || (!olist->file_info.ptr.shared && olist->obj_type != H5I_DATATYPE) || (oloc && oloc->file && oloc->file->shared == olist->file_info.ptr.shared)))) { /* Add the object's ID to the ID list, if appropriate */ if(olist->obj_id_list) { olist->obj_id_list[olist->list_index] = obj_id; olist->list_index++; } /* end if */ /* Increment the number of open objects */ if(olist->obj_id_count) (*olist->obj_id_count)++; /* Check if we've filled up the array. Return TRUE only if * we have filled up the array. Otherwise return FALSE(RET_VALUE is * preset to FALSE) because H5I_search needs the return value of FALSE * to continue searching. */ if(olist->max_index>0 && olist->list_index>=olist->max_index) HGOTO_DONE(TRUE) /* Indicate that the iterator should stop */ } /* end if */ } /* end else */ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5F_get_objects_cb() */ /*------------------------------------------------------------------------- * Function: H5Fget_vfd_handle * * Purpose: Returns a pointer to the file handle of the low-level file * driver. * * Return: Success: non-negative value. * * Failture: negative. * * Programmer: Raymond Lu * Sep. 16, 2002 * * Modification: * *------------------------------------------------------------------------- */ herr_t H5Fget_vfd_handle(hid_t file_id, hid_t fapl, void **file_handle) { H5F_t *file; /* File to query */ herr_t ret_value; /* Return value */ FUNC_ENTER_API(H5Fget_vfd_handle, FAIL) H5TRACE3("e", "ii**x", file_id, fapl, file_handle); /* Check args */ if(!file_handle) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file handle pointer") /* Get the file */ if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE))) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file id") ret_value = H5F_get_vfd_handle(file, fapl, file_handle); done: FUNC_LEAVE_API(ret_value) } /* end H5Fget_vfd_handle() */ /*------------------------------------------------------------------------- * Function: H5F_get_vfd_handle * * Purpose: Returns a pointer to the file handle of the low-level file * driver. This is the private function for H5Fget_vfd_handle. * * Return: Success: Non-negative. * * Failture: negative. * * Programmer: Raymond Lu * Sep. 16, 2002 * * Modification: * *------------------------------------------------------------------------- */ static herr_t H5F_get_vfd_handle(const H5F_t *file, hid_t fapl, void**file_handle) { herr_t ret_value; FUNC_ENTER_NOAPI_NOINIT(H5F_get_vfd_handle) assert(file_handle); if((ret_value=H5FD_get_vfd_handle(file->shared->lf, fapl, file_handle)) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get file handle for file driver") done: FUNC_LEAVE_NOAPI(ret_value) } /*------------------------------------------------------------------------- * Function: H5Fis_hdf5 * * Purpose: Check the file signature to detect an HDF5 file. * * Bugs: This function is not robust: it only uses the default file * driver when attempting to open the file when in fact it * should use all known file drivers. * * Return: Success: TRUE/FALSE * * Failure: Negative * * Programmer: Unknown * * Modifications: * Robb Matzke, 1999-08-02 * Rewritten to use the virtual file layer. *------------------------------------------------------------------------- */ htri_t H5Fis_hdf5(const char *name) { H5FD_t *file = NULL; /* Low-level file struct */ htri_t ret_value; /* Return value */ FUNC_ENTER_API(H5Fis_hdf5, FAIL) H5TRACE1("t", "*s", name); /* Check args and all the boring stuff. */ if(!name || !*name) HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "no file name specified") /* Open the file at the virtual file layer */ if(NULL == (file = H5FD_open(name, H5F_ACC_RDONLY, H5P_FILE_ACCESS_DEFAULT, HADDR_UNDEF))) HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to open file") /* The file is an hdf5 file if the hdf5 file signature can be found */ ret_value = (HADDR_UNDEF != H5F_locate_signature(file, H5AC_ind_dxpl_id)); done: /* Close the file */ if(file) if(H5FD_close(file) < 0 && ret_value >= 0) HDONE_ERROR(H5E_IO, H5E_CANTCLOSEFILE, FAIL, "unable to close file") FUNC_LEAVE_API(ret_value) } /* end H5Fis_hdf5() */ /*------------------------------------------------------------------------- * Function: H5F_new * * Purpose: Creates a new file object and initializes it. The * H5Fopen and H5Fcreate functions then fill in various * fields. If SHARED is a non-null pointer then the shared info * to which it points has the reference count incremented. * Otherwise a new, empty shared info struct is created and * initialized with the specified file access property list. * * Errors: * * Return: Success: Ptr to a new file struct. * * Failure: NULL * * Programmer: Robb Matzke * matzke@llnl.gov * Jul 18 1997 * *------------------------------------------------------------------------- */ static H5F_t * H5F_new(H5F_file_t *shared, hid_t fcpl_id, hid_t fapl_id, H5FD_t *lf) { H5F_t *f = NULL, *ret_value; FUNC_ENTER_NOAPI_NOINIT(H5F_new) if(NULL == (f = H5FL_CALLOC(H5F_t))) HGOTO_ERROR(H5E_FILE, H5E_NOSPACE, NULL, "can't allocate top file structure") f->file_id = -1; if(shared) { HDassert(lf == NULL); f->shared = shared; } /* end if */ else { H5P_genplist_t *plist; /* Property list */ size_t u; /* Local index variable */ HDassert(lf != NULL); if(NULL == (f->shared = H5FL_CALLOC(H5F_file_t))) HGOTO_ERROR(H5E_FILE, H5E_NOSPACE, NULL, "can't allocate shared file structure") f->shared->sohm_addr = HADDR_UNDEF; f->shared->sohm_vers = HDF5_SHAREDHEADER_VERSION; for(u = 0; u < NELMTS(f->shared->fs_addr); u++) f->shared->fs_addr[u] = HADDR_UNDEF; f->shared->accum.loc = HADDR_UNDEF; f->shared->lf = lf; /* * Copy the file creation and file access property lists into the * new file handle. We do this early because some values might need * to change as the file is being opened. */ if(NULL == (plist = (H5P_genplist_t *)H5I_object(fcpl_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not property list") f->shared->fcpl_id = H5P_copy_plist(plist, FALSE); /* Get the FCPL values to cache */ if(H5P_get(plist, H5F_CRT_ADDR_BYTE_NUM_NAME, &f->shared->sizeof_addr) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get byte number for address") if(H5P_get(plist, H5F_CRT_OBJ_BYTE_NUM_NAME, &f->shared->sizeof_size) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get byte number for object size") if(H5P_get(plist, H5F_CRT_SHMSG_NINDEXES_NAME, &f->shared->sohm_nindexes) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get number of SOHM indexes") HDassert(f->shared->sohm_nindexes < 255); /* Get the FAPL values to cache */ if(NULL == (plist = (H5P_genplist_t *)H5I_object(fapl_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not file access property list") if(H5P_get(plist, H5F_ACS_META_CACHE_INIT_CONFIG_NAME, &(f->shared->mdc_initCacheCfg)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get initial metadata cache resize config") if(H5P_get(plist, H5F_ACS_DATA_CACHE_NUM_SLOTS_NAME, &(f->shared->rdcc_nslots)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get data cache number of slots") if(H5P_get(plist, H5F_ACS_DATA_CACHE_BYTE_SIZE_NAME, &(f->shared->rdcc_nbytes)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get data cache byte size") if(H5P_get(plist, H5F_ACS_PREEMPT_READ_CHUNKS_NAME, &(f->shared->rdcc_w0)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get preempt read chunk") if(H5P_get(plist, H5F_ACS_ALIGN_THRHD_NAME, &(f->shared->threshold)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get alignment threshold") if(H5P_get(plist, H5F_ACS_ALIGN_NAME, &(f->shared->alignment)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get alignment") if(H5P_get(plist, H5F_ACS_GARBG_COLCT_REF_NAME,&(f->shared->gc_ref)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get garbage collect reference") if(H5P_get(plist, H5F_ACS_SIEVE_BUF_SIZE_NAME, &(f->shared->sieve_buf_size)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get sieve buffer size") if(H5P_get(plist, H5F_ACS_LATEST_FORMAT_NAME, &(f->shared->latest_format)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get 'latest format' flag") if(H5P_get(plist, H5F_ACS_META_BLOCK_SIZE_NAME, &(f->shared->meta_aggr.alloc_size)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get metadata cache size") f->shared->meta_aggr.feature_flag = H5FD_FEAT_AGGREGATE_METADATA; if(H5P_get(plist, H5F_ACS_SDATA_BLOCK_SIZE_NAME, &(f->shared->sdata_aggr.alloc_size)) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get 'small data' cache size") f->shared->sdata_aggr.feature_flag = H5FD_FEAT_AGGREGATE_SMALLDATA; /* Get the VFD values to cache */ f->shared->maxaddr = H5FD_get_maxaddr(lf); if(!H5F_addr_defined(f->shared->maxaddr)) HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, NULL, "bad maximum address from VFD") if(H5FD_get_feature_flags(lf, &f->shared->feature_flags) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "can't get feature flags from VFD") if(H5FD_get_fs_type_map(lf, f->shared->fs_type_map) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "can't get free space type mapping from VFD") if(H5MF_init_merge_flags(f) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "problem initializing free space merge flags") f->shared->tmp_addr = f->shared->maxaddr; /* Disable temp. space allocation for parallel I/O (for now) */ /* (When we've arranged to have the relocated metadata addresses (and * sizes) broadcast during the "end of epoch" metadata operations, * this can be enabled - QAK) */ /* (This should be disabled when the metadata journaling branch is * merged into the trunk and journaling is enabled, at least until * we make it work. - QAK) */ f->shared->use_tmp_space = !(IS_H5FD_MPI(f)); /* * Create a metadata cache with the specified number of elements. * The cache might be created with a different number of elements and * the access property list should be updated to reflect that. */ if(SUCCEED != H5AC_create(f, &(f->shared->mdc_initCacheCfg))) HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "unable to create metadata cache") /* Create the file's "open object" information */ if(H5FO_create(f) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "unable to create open object data structure") /* Add new "shared" struct to list of open files */ if(H5F_sfile_add(f->shared) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "unable to append to list of open files") } /* end else */ f->shared->nrefs++; /* Create the file's "top open object" information */ if(H5FO_top_create(f) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "unable to create open object data structure") /* Set return value */ ret_value = f; done: if(!ret_value && f) { if(!shared) (void)H5FL_FREE(H5F_file_t, f->shared); (void)H5FL_FREE(H5F_t, f); } /* end if */ FUNC_LEAVE_NOAPI(ret_value) } /* end H5F_new() */ /*------------------------------------------------------------------------- * Function: H5F_dest * * Purpose: Destroys a file structure. This function flushes the cache * but doesn't do any other cleanup other than freeing memory * for the file struct. The shared info for the file is freed * only when its reference count reaches zero. * * Return: Non-negative on success/Negative on failure * * Programmer: Robb Matzke * matzke@llnl.gov * Jul 18 1997 * *------------------------------------------------------------------------- */ static herr_t H5F_dest(H5F_t *f, hid_t dxpl_id) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5F_dest) /* Sanity check */ HDassert(f); HDassert(f->shared); if(1 == f->shared->nrefs) { /* Flush at this point since the file will be closed */ /* (Only try to flush here if the file structure was successfully * initialized (i.e., the file struct is being shutdown in an * orderly manner with the 'closing' flag set) */ if(f->closing) { #if H5AC_DUMP_STATS_ON_CLOSE /* Dump debugging info */ H5AC_stats(f); #endif /* H5AC_DUMP_STATS_ON_CLOSE */ /* Shutdown file free space manager(s) */ /* (We should release the free space information now (before truncating * the file and before the metadata cache is shut down) since the * free space manager is holding some data structures in memory * and also because releasing free space can shrink the file's * 'eoa' value) */ if(H5MF_close(f, dxpl_id) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "can't release file free space info") /* Unpin the superblock, since we're about to destroy the cache */ if(H5AC_unpin_entry(f, f->shared->sblock) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_FSPACE, H5E_CANTUNPIN, FAIL, "unable to unpin superblock") f->shared->sblock = NULL; } /* end if */ /* Remove shared file struct from list of open files */ if(H5F_sfile_remove(f->shared) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "problems closing file") /* Shutdown the metadata cache */ if(H5AC_dest(f, dxpl_id)) /* Push error, but keep going*/ HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "problems closing file") /* * Do not close the root group since we didn't count it, but free * the memory associated with it. */ if(f->shared->root_grp) { /* Free the ID to name buffer */ if(H5G_free_grp_name(f->shared->root_grp) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "problems closing file") /* Free the memory for the root group */ if(H5G_free(f->shared->root_grp) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "problems closing file") f->shared->root_grp = NULL; } /* end if */ /* Destroy other components of the file */ if(H5F_accum_reset(f, dxpl_id) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "problems closing file") if(H5FO_dest(f) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "problems closing file") f->shared->cwfs = (struct H5HG_heap_t **)H5MM_xfree(f->shared->cwfs); if(H5G_node_close(f) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "problems closing file") /* Destroy file creation properties */ if(H5I_GENPROP_LST != H5I_get_type(f->shared->fcpl_id)) /* Push error, but keep going*/ HDONE_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a property list") if(H5I_dec_ref(f->shared->fcpl_id, FALSE) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_PLIST, H5E_CANTFREE, FAIL, "can't close property list") /* Only truncate the file on an orderly close, with write-access */ if(f->closing && (H5F_ACC_RDWR & f->shared->flags)) { /* Truncate the file to the current allocated size */ if(H5FD_truncate(f->shared->lf, dxpl_id, (unsigned)TRUE) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "low level truncate failed") } /* end if */ /* Close the file */ if(H5FD_close(f->shared->lf) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "unable to close file") /* Free mount table */ f->shared->mtab.child = (H5F_mount_t *)H5MM_xfree(f->shared->mtab.child); f->shared->mtab.nalloc = 0; /* Destroy shared file struct */ f->shared = (H5F_file_t *)H5FL_FREE(H5F_file_t, f->shared); } else if(f->shared->nrefs > 0) { /* * There are other references to the shared part of the file. * Only decrement the reference count. */ --f->shared->nrefs; } /* Free the non-shared part of the file */ f->name = (char *)H5MM_xfree(f->name); f->extpath = (char *)H5MM_xfree(f->extpath); if(H5FO_top_dest(f) < 0) HDONE_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "problems closing file") f->shared = NULL; (void)H5FL_FREE(H5F_t, f); FUNC_LEAVE_NOAPI(ret_value) } /* end H5F_dest() */ /*------------------------------------------------------------------------- * Function: H5F_open * * Purpose: Opens (or creates) a file. This function understands the * following flags which are similar in nature to the Posix * open(2) flags. * * H5F_ACC_RDWR: Open with read/write access. If the file is * currently open for read-only access then it * will be reopened. Absence of this flag * implies read-only access. * * H5F_ACC_CREAT: Create a new file if it doesn't exist yet. * The permissions are 0666 bit-wise AND with * the current umask. H5F_ACC_WRITE must also * be specified. * * H5F_ACC_EXCL: This flag causes H5F_open() to fail if the * file already exists. * * H5F_ACC_TRUNC: The file is truncated and a new HDF5 superblock * is written. This operation will fail if the * file is already open. * * Unlinking the file name from the group directed graph while * the file is opened causes the file to continue to exist but * one will not be able to upgrade the file from read-only * access to read-write access by reopening it. Disk resources * for the file are released when all handles to the file are * closed. NOTE: This paragraph probably only applies to Unix; * deleting the file name in other OS's has undefined results. * * The CREATE_PARMS argument is optional. A null pointer will * cause the default file creation parameters to be used. * * The ACCESS_PARMS argument is optional. A null pointer will * cause the default file access parameters to be used. * * Return: Success: A new file pointer. * * Failure: NULL * * Programmer: Robb Matzke * Tuesday, September 23, 1997 * *------------------------------------------------------------------------- */ H5F_t * H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id, hid_t dxpl_id) { H5F_t *file = NULL; /*the success return value */ H5F_file_t *shared = NULL; /*shared part of `file' */ H5FD_t *lf = NULL; /*file driver part of `shared' */ unsigned tent_flags; /*tentative flags */ H5FD_class_t *drvr; /*file driver class info */ H5P_genplist_t *a_plist; /*file access property list */ H5F_close_degree_t fc_degree; /*file close degree */ H5F_t *ret_value; /*actual return value */ FUNC_ENTER_NOAPI(H5F_open, NULL) /* * If the driver has a `cmp' method then the driver is capable of * determining when two file handles refer to the same file and the * library can insure that when the application opens a file twice * that the two handles coordinate their operations appropriately. * Otherwise it is the application's responsibility to never open the * same file more than once at a time. */ if((drvr = H5FD_get_class(fapl_id)) == NULL) HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "unable to retrieve VFL class") /* * Opening a file is a two step process. First we try to open the * file in a way which doesn't affect its state (like not truncating * or creating it) so we can compare it with files that are already * open. If that fails then we try again with the full set of flags * (only if they're different than the original failed attempt). * However, if the file driver can't distinquish between files then * there's no reason to open the file tentatively because it's the * application's responsibility to prevent this situation (there's no * way for us to detect it here anyway). */ if(drvr->cmp) tent_flags = flags & ~(H5F_ACC_CREAT|H5F_ACC_TRUNC|H5F_ACC_EXCL); else tent_flags = flags; if(NULL == (lf = H5FD_open(name, tent_flags, fapl_id, HADDR_UNDEF))) { if(tent_flags == flags) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file") H5E_clear_stack(NULL); tent_flags = flags; if(NULL == (lf = H5FD_open(name, tent_flags, fapl_id, HADDR_UNDEF))) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file") } /* end if */ /* Is the file already open? */ if((shared = H5F_sfile_search(lf)) != NULL) { /* * The file is already open, so use that one instead of the one we * just opened. We only one one H5FD_t* per file so one doesn't * confuse the other. But fail if this request was to truncate the * file (since we can't do that while the file is open), or if the * request was to create a non-existent file (since the file already * exists), or if the new request adds write access (since the * readers don't expect the file to change under them), or if the * SWMR write/read access flags don't agree. */ if(H5FD_close(lf) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to close low-level file info") if(flags & H5F_ACC_TRUNC) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to truncate a file which is already open") if(flags & H5F_ACC_EXCL) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "file exists") if((flags & H5F_ACC_RDWR) && 0 == (shared->flags & H5F_ACC_RDWR)) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "file is already open for read-only") if(((flags & H5F_ACC_SWMR_WRITE) && 0 == (shared->flags & H5F_ACC_SWMR_WRITE)) || (0 == (flags & H5F_ACC_SWMR_WRITE) && (shared->flags & H5F_ACC_SWMR_WRITE))) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "SWMR write access flag not the same for file that is already open") if(((flags & H5F_ACC_SWMR_READ) && 0 == (shared->flags & H5F_ACC_SWMR_READ)) || (0 == (flags & H5F_ACC_SWMR_READ) && (shared->flags & H5F_ACC_SWMR_READ))) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "SWMR read access flag not the same for file that is already open") /* Allocate new "high-level" file struct */ if((file = H5F_new(shared, fcpl_id, fapl_id, NULL)) == NULL) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to create new file object") } /* end if */ else { /* Check if tentative open was good enough */ if(flags != tent_flags) { /* * This file is not yet open by the library and the flags we used to * open it are different than the desired flags. Close the tentative * file and open it for real. */ if(H5FD_close(lf) < 0) { file = NULL; /*to prevent destruction of wrong file*/ HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to close low-level file info") } /* end if */ if(NULL == (lf = H5FD_open(name, flags, fapl_id, HADDR_UNDEF))) { file = NULL; /*to prevent destruction of wrong file*/ HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file") } /* end if */ } /* end if */ if(NULL == (file = H5F_new(NULL, fcpl_id, fapl_id, lf))) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to create new file object") file->shared->flags = flags; } /* end else */ /* Short cuts */ shared = file->shared; lf = shared->lf; /* * The intent at the top level file struct are not necessarily the same as * the flags at the bottom. The top level describes how the file can be * accessed through the HDF5 library. The bottom level describes how the * file can be accessed through the C library. */ file->intent = flags; file->name = H5MM_xstrdup(name); /* * Read or write the file superblock, depending on whether the file is * empty or not. */ if(0 == H5FD_get_eof(lf) && (flags & H5F_ACC_RDWR)) { /* * We've just opened a fresh new file (or truncated one). We need * to create & write the superblock. */ /* Initialize information about the superblock and allocate space for it */ /* (Writes superblock extension messages, if there are any) */ if(H5F_super_init(file, dxpl_id) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "unable to allocate file superblock") /* Create and open the root group */ /* (This must be after the space for the superblock is allocated in * the file, since the superblock must be at offset 0) */ if(H5G_mkroot(file, dxpl_id, TRUE) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "unable to create/open root group") } else if (1 == shared->nrefs) { /* Read the superblock if it hasn't been read before. */ if(H5F_super_read(file, dxpl_id) < 0) HGOTO_ERROR(H5E_FILE, H5E_READERROR, NULL, "unable to read superblock") /* Open the root group */ if(H5G_mkroot(file, dxpl_id, FALSE) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to read root group") } /* end if */ /* Get the file access property list, for future queries */ if(NULL == (a_plist = (H5P_genplist_t *)H5I_object(fapl_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not file access property list") /* * Decide the file close degree. If it's the first time to open the * file, set the degree to access property list value; if it's the * second time or later, verify the access property list value matches * the degree in shared file structure. */ if(H5P_get(a_plist, H5F_ACS_CLOSE_DEGREE_NAME, &fc_degree) < 0) HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get file close degree") if(shared->nrefs == 1) { if(fc_degree == H5F_CLOSE_DEFAULT) shared->fc_degree = lf->cls->fc_degree; else shared->fc_degree = fc_degree; } else if(shared->nrefs > 1) { if(fc_degree == H5F_CLOSE_DEFAULT && shared->fc_degree != lf->cls->fc_degree) HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "file close degree doesn't match") if(fc_degree != H5F_CLOSE_DEFAULT && fc_degree != shared->fc_degree) HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "file close degree doesn't match") } /* end if */ /* formulate the absolute path for later search of target file for external link */ if (H5_build_extpath(name, &file->extpath) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "unable to build extpath") /* Success */ ret_value = file; done: if(!ret_value && file) if(H5F_dest(file, dxpl_id) < 0) HDONE_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, NULL, "problems closing file") FUNC_LEAVE_NOAPI(ret_value) } /* end H5F_open() */ /*------------------------------------------------------------------------- * Function: H5Fcreate * * Purpose: This is the primary function for creating HDF5 files . The * flags parameter determines whether an existing file will be * overwritten or not. All newly created files are opened for * both reading and writing. All flags may be combined with the * bit-wise OR operator (`|') to change the behavior of the file * create call. * * The more complex behaviors of a file's creation and access * are controlled through the file-creation and file-access * property lists. The value of H5P_DEFAULT for a template * value indicates that the library should use the default * values for the appropriate template. * * See also: H5Fpublic.h for the list of supported flags. H5Ppublic.h for * the list of file creation and file access properties. * * Return: Success: A file ID * * Failure: FAIL * * Programmer: Unknown * *------------------------------------------------------------------------- */ hid_t H5Fcreate(const char *filename, unsigned flags, hid_t fcpl_id, hid_t fapl_id) { H5F_t *new_file = NULL; /*file struct for new file */ hid_t ret_value; /*return value */ FUNC_ENTER_API(H5Fcreate, FAIL) H5TRACE4("i", "*sIuii", filename, flags, fcpl_id, fapl_id); /* Check/fix arguments */ if(!filename || !*filename) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file name") /* In this routine, we only accept the following flags: * H5F_ACC_EXCL, H5F_ACC_TRUNC, H5F_ACC_DEBUG and H5F_ACC_SWMR_WRITE */ if(flags & ~(H5F_ACC_EXCL | H5F_ACC_TRUNC | H5F_ACC_DEBUG | H5F_ACC_SWMR_WRITE)) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid flags") /* The H5F_ACC_EXCL and H5F_ACC_TRUNC flags are mutually exclusive */ if((flags & H5F_ACC_EXCL) && (flags & H5F_ACC_TRUNC)) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "mutually exclusive flags for file creation") /* Check file creation property list */ if(H5P_DEFAULT == fcpl_id) fcpl_id = H5P_FILE_CREATE_DEFAULT; else if(TRUE != H5P_isa_class(fcpl_id, H5P_FILE_CREATE)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not file create property list") /* Check the file access property list */ if(H5P_DEFAULT == fapl_id) fapl_id = H5P_FILE_ACCESS_DEFAULT; else if(TRUE != H5P_isa_class(fapl_id, H5P_FILE_ACCESS)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not file access property list") /* * Adjust bit flags by turning on the creation bit and making sure that * the EXCL or TRUNC bit is set. All newly-created files are opened for * reading and writing. */ if (0==(flags & (H5F_ACC_EXCL|H5F_ACC_TRUNC))) flags |= H5F_ACC_EXCL; /*default*/ flags |= H5F_ACC_RDWR | H5F_ACC_CREAT; /* * Create a new file or truncate an existing file. */ if(NULL == (new_file = H5F_open(filename, flags, fcpl_id, fapl_id, H5AC_dxpl_id))) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to create file") /* Get an atom for the file */ if((ret_value = H5I_register(H5I_FILE, new_file, TRUE)) < 0) HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to atomize file") /* Keep this ID in file object structure */ new_file->file_id = ret_value; done: if(ret_value < 0 && new_file) if(H5F_close(new_file) < 0) HDONE_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "problems closing file") FUNC_LEAVE_API(ret_value) } /* end H5Fcreate() */ /*------------------------------------------------------------------------- * Function: H5Fopen * * Purpose: This is the primary function for accessing existing HDF5 * files. The FLAGS argument determines whether writing to an * existing file will be allowed or not. All flags may be * combined with the bit-wise OR operator (`|') to change the * behavior of the file open call. The more complex behaviors * of a file's access are controlled through the file-access * property list. * * See Also: H5Fpublic.h for a list of possible values for FLAGS. * * Return: Success: A file ID * * Failure: FAIL * * Programmer: Unknown * * Modifications: * Robb Matzke, 1997-07-18 * File struct creation and destruction is through H5F_new() and * H5F_dest(). Reading the root symbol table entry is done with * H5G_decode(). * * Robb Matzke, 1997-09-23 * Most of the work is now done by H5F_open() since H5Fcreate() * and H5Fopen() originally contained almost identical code. * * Robb Matzke, 1998-02-18 * Added better error checking for the flags and the file access * property list. It used to be possible to make the library * dump core by passing an object ID that was not a file access * property list. * * Robb Matzke, 1999-08-02 * The file access property list is passed to the H5F_open() as * object IDs. *------------------------------------------------------------------------- */ hid_t H5Fopen(const char *filename, unsigned flags, hid_t fapl_id) { H5F_t *new_file = NULL; /*file struct for new file */ hid_t ret_value; /*return value */ FUNC_ENTER_API(H5Fopen, FAIL) H5TRACE3("i", "*sIui", filename, flags, fapl_id); /* Check/fix arguments. */ if(!filename || !*filename) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file name") /* Reject undefined flags (~H5F_ACC_PUBLIC_FLAGS) and the H5F_ACC_TRUNC & H5F_ACC_EXCL flags */ if((flags & ~H5F_ACC_PUBLIC_FLAGS) || (flags & H5F_ACC_TRUNC) || (flags & H5F_ACC_EXCL)) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file open flags") /* Asking for SWMR write access on a read-only file is invalid */ if((flags & H5F_ACC_SWMR_WRITE) && 0 == (flags & H5F_ACC_RDWR)) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "SWMR write access on a file open for read-only access is not allowed") /* Asking for SWMR read access on a non-read-only file is invalid */ if((flags & H5F_ACC_SWMR_READ) && (flags & H5F_ACC_RDWR)) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "SWMR read access on a file open for read-write access is not allowed") if(H5P_DEFAULT == fapl_id) fapl_id = H5P_FILE_ACCESS_DEFAULT; else if(TRUE != H5P_isa_class(fapl_id, H5P_FILE_ACCESS)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not file access property list") /* Open the file */ if(NULL == (new_file = H5F_open(filename, flags, H5P_FILE_CREATE_DEFAULT, fapl_id, H5AC_dxpl_id))) HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to open file") /* Get an atom for the file */ if((ret_value = H5I_register(H5I_FILE, new_file, TRUE)) < 0) HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to atomize file handle") /* Keep this ID in file object structure */ new_file->file_id = ret_value; done: if(ret_value < 0 && new_file && H5F_try_close(new_file) < 0) HDONE_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "problems closing file") FUNC_LEAVE_API(ret_value) } /* end H5Fopen() */ /*------------------------------------------------------------------------- * Function: H5Fflush * * Purpose: Flushes all outstanding buffers of a file to disk but does * not remove them from the cache. The OBJECT_ID can be a file, * dataset, group, attribute, or named data type. * * Return: Non-negative on success/Negative on failure * * Programmer: Robb Matzke * Thursday, August 6, 1998 * *------------------------------------------------------------------------- */ herr_t H5Fflush(hid_t object_id, H5F_scope_t scope) { H5F_t *f = NULL; /* File to flush */ H5O_loc_t *oloc = NULL; /* Object location for ID */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(H5Fflush, FAIL) H5TRACE2("e", "iFs", object_id, scope); switch(H5I_get_type(object_id)) { case H5I_FILE: if(NULL == (f = (H5F_t *)H5I_object(object_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid file identifier") break; case H5I_GROUP: { H5G_t *grp; if(NULL == (grp = (H5G_t *)H5I_object(object_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid group identifier") oloc = H5G_oloc(grp); } break; case H5I_DATATYPE: { H5T_t *type; if(NULL == (type = (H5T_t *)H5I_object(object_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid type identifier") oloc = H5T_oloc(type); } break; case H5I_DATASET: { H5D_t *dset; if(NULL == (dset = (H5D_t *)H5I_object(object_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid dataset identifier") oloc = H5D_oloc(dset); } break; case H5I_ATTR: { H5A_t *attr; if(NULL == (attr = (H5A_t *)H5I_object(object_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid attribute identifier") oloc = H5A_oloc(attr); } break; default: HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file or file object") } /* end switch */ if(!f) { if(!oloc) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "object is not assocated with a file") f = oloc->file; } /* end if */ if(!f) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "object is not associated with a file") /* Flush the file */ /* * Nothing to do if the file is read only. This determination is * made at the shared open(2) flags level, implying that opening a * file twice, once for read-only and once for read-write, and then * calling H5Fflush() with the read-only handle, still causes data * to be flushed. */ if(H5F_ACC_RDWR & f->shared->flags) { /* Flush other files, depending on scope */ if(H5F_SCOPE_GLOBAL == scope) { /* Call the flush routine for mounted file hierarchies */ if(H5F_flush_mounts(f, H5AC_dxpl_id) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush mounted file hierarchy") } /* end if */ else { /* Call the flush routine, for this file */ if(H5F_flush(f, H5AC_dxpl_id) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush file's cached information") } /* end else */ } /* end if */ done: FUNC_LEAVE_API(ret_value) } /* end H5Fflush() */ /*------------------------------------------------------------------------- * Function: H5F_flush * * Purpose: Flushes cached data. * * Return: Non-negative on success/Negative on failure * * Programmer: Robb Matzke * matzke@llnl.gov * Aug 29 1997 * *------------------------------------------------------------------------- */ herr_t H5F_flush(H5F_t *f, hid_t dxpl_id) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(H5F_flush, FAIL) /* Sanity check arguments */ HDassert(f); /* Flush any cached dataset storage raw data */ if(H5D_flush(f, dxpl_id) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush dataset cache") /* Release any space allocated to space aggregators, so that the eoa value * corresponds to the end of the space written to in the file. */ /* (needs to happen before cache flush, with superblock write, since the * 'eoa' value is written in superblock -QAK) */ if(H5MF_free_aggrs(f, dxpl_id) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "can't release file space") /* Flush the entire metadata cache */ if(H5AC_flush(f, dxpl_id) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush metadata cache") /* Flush out the metadata accumulator */ if(H5F_accum_flush(f, dxpl_id) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_IO, H5E_CANTFLUSH, FAIL, "unable to flush metadata accumulator") /* Flush file buffers to disk. */ if(H5FD_flush(f->shared->lf, dxpl_id, FALSE) < 0) /* Push error, but keep going*/ HDONE_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "low level flush failed") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5F_flush() */ /*------------------------------------------------------------------------- * Function: H5F_close * * Purpose: Closes a file or causes the close operation to be pended. * This function is called two ways: from the API it gets called * by H5Fclose->H5I_dec_ref->H5F_close when H5I_dec_ref() * decrements the file ID reference count to zero. The file ID * is removed from the H5I_FILE group by H5I_dec_ref() just * before H5F_close() is called. If there are open object * headers then the close is pended by moving the file to the * H5I_FILE_CLOSING ID group (the f->closing contains the ID * assigned to file). * * This function is also called directly from H5O_close() when * the last object header is closed for the file and the file * has a pending close. * * Return: Non-negative on success/Negative on failure * * Programmer: Robb Matzke * Tuesday, September 23, 1997 * *------------------------------------------------------------------------- */ static herr_t H5F_close(H5F_t *f) { herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5F_close) /* Sanity check */ HDassert(f); HDassert(f->file_id > 0); /* This routine should only be called when a file ID's ref count drops to zero */ /* Perform checks for "semi" file close degree here, since closing the * file is not allowed if there are objects still open */ if(f->shared->fc_degree == H5F_CLOSE_SEMI) { unsigned nopen_files = 0; /* Number of open files in file/mount hierarchy */ unsigned nopen_objs = 0; /* Number of open objects in file/mount hierarchy */ /* Get the number of open objects and open files on this file/mount hierarchy */ if(H5F_mount_count_ids(f, &nopen_files, &nopen_objs) < 0) HGOTO_ERROR(H5E_SYM, H5E_MOUNT, FAIL, "problem checking mount hierarchy") /* If there are no other file IDs open on this file/mount hier., but * there are still open objects, issue an error and bail out now, * without decrementing the file ID's reference count and triggering * a "real" attempt at closing the file */ if(nopen_files == 1 && nopen_objs > 0) HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close file, there are objects still open") } /* end if */ /* Reset the file ID for this file */ f->file_id = -1; /* Attempt to close the file/mount hierarchy */ if(H5F_try_close(f) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close file") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5F_close() */ /*------------------------------------------------------------------------- * Function: H5F_try_close * * Purpose: Attempts to close a file due to one of several actions: * - The reference count on the file ID dropped to zero * - The last open object was closed in the file * - The file was unmounted * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * Tuesday, July 19, 2005 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5F_try_close(H5F_t *f) { unsigned nopen_files = 0; /* Number of open files in file/mount hierarchy */ unsigned nopen_objs = 0; /* Number of open objects in file/mount hierarchy */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5F_try_close) /* Sanity check */ HDassert(f); HDassert(f->shared); /* Check if this file is already in the process of closing */ if(f->closing) HGOTO_DONE(SUCCEED) /* Get the number of open objects and open files on this file/mount hierarchy */ if(H5F_mount_count_ids(f, &nopen_files, &nopen_objs) < 0) HGOTO_ERROR(H5E_SYM, H5E_MOUNT, FAIL, "problem checking mount hierarchy") /* * Close file according to close degree: * * H5F_CLOSE_WEAK: if there are still objects open, wait until * they are all closed. * H5F_CLOSE_SEMI: if there are still objects open, return fail; * otherwise, close file. * H5F_CLOSE_STRONG: if there are still objects open, close them * first, then close file. */ switch(f->shared->fc_degree) { case H5F_CLOSE_WEAK: /* * If file or object IDS are still open then delay deletion of * resources until they have all been closed. Flush all * caches and update the object header anyway so that failing to * close all objects isn't a major problem. */ if((nopen_files + nopen_objs) > 0) HGOTO_DONE(SUCCEED) break; case H5F_CLOSE_SEMI: /* Can leave safely if file IDs are still open on this file */ if(nopen_files > 0) HGOTO_DONE(SUCCEED) /* Sanity check: If close degree if "semi" and we have gotten this * far and there are objects left open, bail out now */ HDassert(nopen_files == 0 && nopen_objs == 0); /* If we've gotten this far (ie. there are no open objects in the file), fall through to flush & close */ break; case H5F_CLOSE_STRONG: /* If there are other open files in the hierarchy, we can leave now */ if(nopen_files > 0) HGOTO_DONE(SUCCEED) /* If we've gotten this far (ie. there are no open file IDs in the file/mount hierarchy), fall through to flush & close */ break; default: HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close file, unknown file close degree") } /* end switch */ /* Mark this file as closing (prevents re-entering file shutdown code below) */ f->closing = TRUE; /* If the file close degree is "strong", close all the open objects in this file */ if(f->shared->fc_degree == H5F_CLOSE_STRONG) { HDassert(nopen_files == 0); /* Forced close of all opened objects in this file */ if(f->nopen_objs > 0) { unsigned obj_count; /* # of open objects */ hid_t objs[128]; /* Array of objects to close */ unsigned u; /* Local index variable */ /* Get the list of IDs of open dataset, group, & attribute objects */ while((obj_count = H5F_get_obj_ids(f, H5F_OBJ_LOCAL|H5F_OBJ_DATASET|H5F_OBJ_GROUP|H5F_OBJ_ATTR, (int)(sizeof(objs)/sizeof(objs[0])), objs, FALSE)) != 0) { /* Try to close all the open objects in this file */ for(u = 0; u < obj_count; u++) if(H5I_dec_ref(objs[u], FALSE) < 0) HGOTO_ERROR(H5E_ATOM, H5E_CLOSEERROR, FAIL, "can't close object") } /* end while */ /* Get the list of IDs of open named datatype objects */ /* (Do this separately from the dataset & attribute IDs, because * they could be using one of the named datatypes and then the * open named datatype ID will get closed twice) */ while((obj_count = H5F_get_obj_ids(f, H5F_OBJ_LOCAL|H5F_OBJ_DATATYPE, (int)(sizeof(objs)/sizeof(objs[0])), objs, FALSE)) != 0) { /* Try to close all the open objects in this file */ for(u = 0; u < obj_count; u++) if(H5I_dec_ref(objs[u], FALSE) < 0) HGOTO_ERROR(H5E_ATOM, H5E_CLOSEERROR, FAIL, "can't close object") } /* end while */ } /* end if */ } /* end if */ /* Check if this is a child file in a mounting hierarchy & proceed up the * hierarchy if so. */ if(f->parent) if(H5F_try_close(f->parent) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close parent file") /* Unmount and close each child before closing the current file. */ if(H5F_close_mounts(f) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't unmount child files") /* Flush at this point since the file will be closed. Don't invalidate * the cache, since this file might still be open using another handle. * However, make sure we flush in case that handle is read-only; its * copy of the cache needs to be clean. * Only try to flush the file if it was opened with write access. */ if(f->intent&H5F_ACC_RDWR) { /* Flush all caches */ if(H5F_flush(f, H5AC_dxpl_id) < 0) HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush cache") } /* end if */ /* * Destroy the H5F_t struct and decrement the reference count for the * shared H5F_file_t struct. If the reference count for the H5F_file_t * struct reaches zero then destroy it also. */ if(H5F_dest(f, H5AC_dxpl_id) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "problems closing file") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5F_try_close() */ /*------------------------------------------------------------------------- * Function: H5Fclose * * Purpose: This function closes the file specified by FILE_ID by * flushing all data to storage, and terminating access to the * file through FILE_ID. If objects (e.g., datasets, groups, * etc.) are open in the file then the underlying storage is not * closed until those objects are closed; however, all data for * the file and the open objects is flushed. * * Return: Success: Non-negative * * Failure: Negative * * Programmer: Robb Matzke * Saturday, February 20, 1999 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5Fclose(hid_t file_id) { herr_t ret_value = SUCCEED; FUNC_ENTER_API(H5Fclose, FAIL) H5TRACE1("e", "i", file_id); /* Check/fix arguments. */ if(H5I_FILE != H5I_get_type(file_id)) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file ID") /* * Decrement reference count on atom. When it reaches zero the file will * be closed. */ if(H5I_dec_ref(file_id, TRUE) < 0) HGOTO_ERROR(H5E_ATOM, H5E_CANTCLOSEFILE, FAIL, "decrementing file ID failed") done: FUNC_LEAVE_API(ret_value) } /* end H5Fclose() */ /*------------------------------------------------------------------------- * Function: H5Freopen * * Purpose: Reopen a file. The new file handle which is returned points * to the same file as the specified file handle. Both handles * share caches and other information. The only difference * between the handles is that the new handle is not mounted * anywhere and no files are mounted on it. * * Return: Success: New file ID * * Failure: FAIL * * Programmer: Robb Matzke * Friday, October 16, 1998 * * Modifications: * Quincey Koziol, May 14, 2002 * Keep old file's read/write intent in reopened file. * *------------------------------------------------------------------------- */ hid_t H5Freopen(hid_t file_id) { H5F_t *old_file = NULL; H5F_t *new_file = NULL; hid_t ret_value; FUNC_ENTER_API(H5Freopen, FAIL) H5TRACE1("i", "i", file_id); /* Check arguments */ if(NULL == (old_file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file") /* Get a new "top level" file struct, sharing the same "low level" file struct */ if(NULL == (new_file = H5F_new(old_file->shared, H5P_FILE_CREATE_DEFAULT, H5P_FILE_ACCESS_DEFAULT, NULL))) HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to reopen file") /* Keep old file's read/write intent in new file */ new_file->intent = old_file->intent; /* Duplicate old file's name */ new_file->name = H5MM_xstrdup(old_file->name); if((ret_value = H5I_register(H5I_FILE, new_file, TRUE)) < 0) HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to atomize file handle") /* Keep this ID in file object structure */ new_file->file_id = ret_value; done: if(ret_value < 0 && new_file) if(H5F_dest(new_file, H5AC_dxpl_id) < 0) HDONE_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close file") FUNC_LEAVE_API(ret_value) } /* end H5Freopen() */ /*------------------------------------------------------------------------- * Function: H5Fget_intent * * Purpose: Public API to retrieve the file's 'intent' flags passed * during H5Fopen() * * Return: Non-negative on success/negative on failure * * Programmer: James Laird * August 23, 2006 * *------------------------------------------------------------------------- */ herr_t H5Fget_intent(hid_t file_id, unsigned *intent_flags) { herr_t ret_value = SUCCEED; FUNC_ENTER_API(H5Fget_intent, FAIL) H5TRACE2("e", "i*Iu", file_id, intent_flags); /* If no intent flags were passed in, exit quietly */ if(intent_flags) { H5F_t * file; /* Pointer to file structure */ /* Get the internal file structure */ if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file") /* HDF5 uses some flags internally that users don't know about. * Simplify things for them so that they only get either H5F_ACC_RDWR * or H5F_ACC_RDONLY. */ if(H5F_INTENT(file) & H5F_ACC_RDWR) { *intent_flags = H5F_ACC_RDWR; /* Check for SWMR write access on the file */ if(H5F_INTENT(file) & H5F_ACC_SWMR_WRITE) *intent_flags |= H5F_ACC_SWMR_WRITE; } /* end if */ else { *intent_flags = H5F_ACC_RDONLY; /* Check for SWMR read access on the file */ if(H5F_INTENT(file) & H5F_ACC_SWMR_READ) *intent_flags |= H5F_ACC_SWMR_READ; } /* end else */ } /* end if */ done: FUNC_LEAVE_API(ret_value) } /* end H5Fget_intent() */ /*------------------------------------------------------------------------- * Function: H5F_get_id * * Purpose: Get the file ID, incrementing it, or "resurrecting" it as * appropriate. * * Return: Non-negative on success/Negative on failure * * Programmer: Raymond Lu * Oct 29, 2003 * *------------------------------------------------------------------------- */ hid_t H5F_get_id(H5F_t *file, hbool_t app_ref) { hid_t ret_value; FUNC_ENTER_NOAPI_NOINIT(H5F_get_id) HDassert(file); if(file->file_id == -1) { /* Get an atom for the file */ if((file->file_id = H5I_register(H5I_FILE, file, app_ref)) < 0) HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to atomize file") } else { /* Increment reference count on atom. */ if(H5I_inc_ref(file->file_id, app_ref) < 0) HGOTO_ERROR(H5E_ATOM, H5E_CANTSET, FAIL, "incrementing file ID failed") } /* end else */ ret_value = file->file_id; done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5F_get_id() */ /*------------------------------------------------------------------------- * Function: H5F_get_eoa * * Purpose: Quick and dirty routine to retrieve the file's 'eoa' value * * Return: Non-negative on success/Negative on failure * * Programmer: Quincey Koziol * June 1, 2004 * *------------------------------------------------------------------------- */ haddr_t H5F_get_eoa(const H5F_t *f, H5FD_mem_t type) { haddr_t ret_value; FUNC_ENTER_NOAPI(H5F_get_eoa, HADDR_UNDEF) HDassert(f); HDassert(f->shared); /* Dispatch to driver */ if(HADDR_UNDEF == (ret_value = H5FD_get_eoa(f->shared->lf, type))) HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "driver get_eoa request failed") done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5F_get_eoa() */ /*------------------------------------------------------------------------- * Function: H5F_incr_nopen_objs * * Purpose: Increment the number of open objects for a file. * * Return: Success: The number of open objects, after the increment * * Failure: (can't happen) * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Mar 6 2007 * *------------------------------------------------------------------------- */ unsigned H5F_incr_nopen_objs(H5F_t *f) { /* Use FUNC_ENTER_NOAPI_NOINIT_NOFUNC here to avoid performance issues */ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5F_incr_nopen_objs) HDassert(f); FUNC_LEAVE_NOAPI(++f->nopen_objs) } /* end H5F_incr_nopen_objs() */ /*------------------------------------------------------------------------- * Function: H5F_decr_nopen_objs * * Purpose: Decrement the number of open objects for a file. * * Return: Success: The number of open objects, after the decrement * * Failure: (can't happen) * * Programmer: Quincey Koziol * koziol@hdfgroup.org * Mar 6 2007 * *------------------------------------------------------------------------- */ unsigned H5F_decr_nopen_objs(H5F_t *f) { /* Use FUNC_ENTER_NOAPI_NOINIT_NOFUNC here to avoid performance issues */ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5F_decr_nopen_objs) HDassert(f); FUNC_LEAVE_NOAPI(--f->nopen_objs) } /* end H5F_decr_nopen_objs() */ /*------------------------------------------------------------------------- * Function: H5F_addr_encode_len * * Purpose: Encodes an address into the buffer pointed to by *PP and * then increments the pointer to the first byte after the * address. An undefined value is stored as all 1's. * * Return: void * * Programmer: Robb Matzke * Friday, November 7, 1997 * *------------------------------------------------------------------------- */ void H5F_addr_encode_len(size_t addr_len, uint8_t **pp/*in,out*/, haddr_t addr) { unsigned u; /* Local index variable */ /* Use FUNC_ENTER_NOAPI_NOINIT_NOFUNC here to avoid performance issues */ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5F_addr_encode_len) HDassert(addr_len); HDassert(pp && *pp); if(H5F_addr_defined(addr)) { for(u = 0; u < addr_len; u++) { *(*pp)++ = (uint8_t)(addr & 0xff); addr >>= 8; } /* end for */ HDassert("overflow" && 0 == addr); } /* end if */ else { for(u = 0; u < addr_len; u++) *(*pp)++ = 0xff; } /* end else */ FUNC_LEAVE_NOAPI_VOID } /* end H5F_addr_encode_len() */ /*------------------------------------------------------------------------- * Function: H5F_addr_encode * * Purpose: Encodes an address into the buffer pointed to by *PP and * then increments the pointer to the first byte after the * address. An undefined value is stored as all 1's. * * Return: void * * Programmer: Robb Matzke * Friday, November 7, 1997 * *------------------------------------------------------------------------- */ void H5F_addr_encode(const H5F_t *f, uint8_t **pp/*in,out*/, haddr_t addr) { /* Use FUNC_ENTER_NOAPI_NOINIT_NOFUNC here to avoid performance issues */ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5F_addr_encode) HDassert(f); H5F_addr_encode_len(H5F_SIZEOF_ADDR(f), pp, addr); FUNC_LEAVE_NOAPI_VOID } /* end H5F_addr_encode() */ /*------------------------------------------------------------------------- * Function: H5F_addr_decode_len * * Purpose: Decodes an address from the buffer pointed to by *PP and * updates the pointer to point to the next byte after the * address. * * If the value read is all 1's then the address is returned * with an undefined value. * * Return: void * * Programmer: Robb Matzke * Friday, November 7, 1997 * *------------------------------------------------------------------------- */ void H5F_addr_decode_len(size_t addr_len, const uint8_t **pp/*in,out*/, haddr_t *addr_p/*out*/) { hbool_t all_zero = TRUE; /* True if address was all zeroes */ unsigned u; /* Local index variable */ /* Use FUNC_ENTER_NOAPI_NOINIT_NOFUNC here to avoid performance issues */ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5F_addr_decode_len) HDassert(addr_len); HDassert(pp && *pp); HDassert(addr_p); /* Reset value in destination */ *addr_p = 0; /* Decode bytes from address */ for(u = 0; u < addr_len; u++) { uint8_t c; /* Local decoded byte */ /* Get decoded byte (and advance pointer) */ c = *(*pp)++; /* Check for non-undefined address byte value */ if(c != 0xff) all_zero = FALSE; if(u < sizeof(*addr_p)) { haddr_t tmp = c; /* Local copy of address, for casting */ /* Shift decoded byte to correct position */ tmp <<= (u * 8); /*use tmp to get casting right */ /* Merge into already decoded bytes */ *addr_p |= tmp; } /* end if */ else if(!all_zero) HDassert(0 == **pp); /*overflow */ } /* end for */ /* If 'all_zero' is still TRUE, the address was entirely composed of '0xff' * bytes, which is the encoded form of 'HADDR_UNDEF', so set the destination * to that value */ if(all_zero) *addr_p = HADDR_UNDEF; FUNC_LEAVE_NOAPI_VOID } /* end H5F_addr_decode_len() */ /*------------------------------------------------------------------------- * Function: H5F_addr_decode * * Purpose: Decodes an address from the buffer pointed to by *PP and * updates the pointer to point to the next byte after the * address. * * If the value read is all 1's then the address is returned * with an undefined value. * * Return: void * * Programmer: Robb Matzke * Friday, November 7, 1997 * *------------------------------------------------------------------------- */ void H5F_addr_decode(const H5F_t *f, const uint8_t **pp/*in,out*/, haddr_t *addr_p/*out*/) { /* Use FUNC_ENTER_NOAPI_NOINIT_NOFUNC here to avoid performance issues */ FUNC_ENTER_NOAPI_NOINIT_NOFUNC(H5F_addr_decode) HDassert(f); H5F_addr_decode_len(H5F_SIZEOF_ADDR(f), pp, addr_p); FUNC_LEAVE_NOAPI_VOID } /* end H5F_addr_decode() */ /*------------------------------------------------------------------------- * Function: H5Fget_freespace * * Purpose: Retrieves the amount of free space in the file. * * Return: Success: Amount of free space for type * Failure: Negative * * Programmer: Quincey Koziol * koziol@ncsa.uiuc.edu * Oct 6, 2003 * *------------------------------------------------------------------------- */ hssize_t H5Fget_freespace(hid_t file_id) { H5F_t *file; /* File object for file ID */ hsize_t tot_space; /* Amount of free space in the file */ hssize_t ret_value; /* Return value */ FUNC_ENTER_API(H5Fget_freespace, FAIL) H5TRACE1("Hs", "i", file_id); /* Check args */ if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE))) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file ID") /* Go get the actual amount of free space in the file */ if(H5MF_get_freespace(file, H5AC_ind_dxpl_id, &tot_space, NULL) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to check free space for file") ret_value = (hssize_t)tot_space; done: FUNC_LEAVE_API(ret_value) } /* end H5Fget_freespace() */ /*------------------------------------------------------------------------- * Function: H5Fget_filesize * * Purpose: Retrieves the file size of the HDF5 file. This function * is called after an existing file is opened in order * to learn the true size of the underlying file. * * Return: Success: Non-negative * Failure: Negative * * Programmer: David Pitt * david.pitt@bigpond.com * Apr 27, 2004 * * Modifications: * *------------------------------------------------------------------------- */ herr_t H5Fget_filesize(hid_t file_id, hsize_t *size) { H5F_t *file; /* File object for file ID */ haddr_t eof; /* End of file address */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(H5Fget_filesize, FAIL) H5TRACE2("e", "i*h", file_id, size); /* Check args */ if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE))) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file ID") /* Go get the actual file size */ if(HADDR_UNDEF == (eof = H5FDget_eof(file->shared->lf))) HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to get file size") *size = (hsize_t)eof; done: FUNC_LEAVE_API(ret_value) } /* end H5Fget_filesize() */ /*------------------------------------------------------------------------- * Function: H5Fget_mdc_config * * Purpose: Retrieves the current automatic cache resize configuration * from the metadata cache, and return it in *config_ptr. * * Note that the version field of *config_Ptr must be correctly * filled in by the caller. This allows us to adapt for * obsolete versions of the structure. * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 3/24/05 * * Modifications: * * Reworked for the addition of the config_ptr parameter. * JRM -- 4/7/05 * *------------------------------------------------------------------------- */ herr_t H5Fget_mdc_config(hid_t file_id, H5AC_cache_config_t *config_ptr) { H5F_t *file; /* File object for file ID */ herr_t result; herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(H5Fget_mdc_config, FAIL) H5TRACE2("e", "i*x", file_id, config_ptr); /* Check args */ if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE))) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file ID") if((NULL == config_ptr) || (config_ptr->version != H5AC__CURR_CACHE_CONFIG_VERSION)) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Bad config_ptr") /* Go get the resize configuration */ result = H5AC_get_cache_auto_resize_config(file->shared->cache, config_ptr); if ( result != SUCCEED ) { HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, \ "H5AC_get_cache_auto_resize_config() failed."); } done: FUNC_LEAVE_API(ret_value) } /* H5Fget_mdc_config() */ /*------------------------------------------------------------------------- * Function: H5Fset_mdc_config * * Purpose: Sets the current metadata cache automatic resize * configuration, using the contents of the instance of * H5AC_cache_config_t pointed to by config_ptr. * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 3/24/05 * * Modifications: * * None. * *------------------------------------------------------------------------- */ herr_t H5Fset_mdc_config(hid_t file_id, H5AC_cache_config_t *config_ptr) { H5F_t *file; /* File object for file ID */ herr_t result; herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(H5Fset_mdc_config, FAIL) H5TRACE2("e", "i*x", file_id, config_ptr); /* Check args */ if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE))) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file ID") /* set the resize configuration */ result = H5AC_set_cache_auto_resize_config(file->shared->cache, config_ptr); if ( result != SUCCEED ) { HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, \ "H5AC_set_cache_auto_resize_config() failed."); } done: FUNC_LEAVE_API(ret_value) } /* H5Fset_mdc_config() */ /*------------------------------------------------------------------------- * Function: H5Fget_mdc_hit_rate * * Purpose: Retrieves the current hit rate from the metadata cache. * This rate is the overall hit rate since the last time * the hit rate statistics were reset either manually or * automatically. * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 3/24/05 * * Modifications: * * None. * *------------------------------------------------------------------------- */ herr_t H5Fget_mdc_hit_rate(hid_t file_id, double *hit_rate_ptr) { H5F_t *file; /* File object for file ID */ herr_t result; herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(H5Fget_mdc_hit_rate, FAIL) H5TRACE2("e", "i*d", file_id, hit_rate_ptr); /* Check args */ if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE))) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file ID") if(NULL == hit_rate_ptr) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "NULL hit rate pointer") /* Go get the current hit rate */ result = H5AC_get_cache_hit_rate(file->shared->cache, hit_rate_ptr); if ( result != SUCCEED ) { HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, \ "H5AC_get_cache_hit_rate() failed."); } done: FUNC_LEAVE_API(ret_value) } /* H5Fget_mdc_hit_rate() */ /*------------------------------------------------------------------------- * Function: H5Fget_mdc_size * * Purpose: Retrieves the maximum size, minimum clean size, current * size, and current number of entries from the metadata * cache associated with the specified file. If any of * the ptr parameters are NULL, the associated datum is * not returned. * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 3/24/05 * * Modifications: * * None. * *------------------------------------------------------------------------- */ herr_t H5Fget_mdc_size(hid_t file_id, size_t *max_size_ptr, size_t *min_clean_size_ptr, size_t *cur_size_ptr, int *cur_num_entries_ptr) { H5F_t *file; /* File object for file ID */ int32_t cur_num_entries; herr_t result; herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(H5Fget_mdc_size, FAIL) H5TRACE5("e", "i*z*z*z*Is", file_id, max_size_ptr, min_clean_size_ptr, cur_size_ptr, cur_num_entries_ptr); /* Check args */ if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE))) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file ID") /* Go get the size data */ result = H5AC_get_cache_size(file->shared->cache, max_size_ptr, min_clean_size_ptr, cur_size_ptr, &cur_num_entries); if ( result != SUCCEED ) { HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, \ "H5AC_get_cache_size() failed."); } else if ( cur_num_entries_ptr != NULL ) { *cur_num_entries_ptr = (int)cur_num_entries; } done: FUNC_LEAVE_API(ret_value) } /* H5Fget_mdc_size() */ /*------------------------------------------------------------------------- * Function: H5Freset_mdc_hit_rate_stats * * Purpose: Reset the hit rate statistic whose current value can * be obtained via the H5Fget_mdc_hit_rate() call. Note * that this statistic will also be reset once per epoch * by the automatic cache resize code if it is enabled. * * It is probably a bad idea to call this function unless * you are controlling cache size from your program instead * of using our cache size control code. * * Return: Success: SUCCEED * Failure: FAIL * * Programmer: John Mainzer * 3/24/05 * * Modifications: * * None. * *------------------------------------------------------------------------- */ herr_t H5Freset_mdc_hit_rate_stats(hid_t file_id) { H5F_t *file; /* File object for file ID */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(H5Freset_mdc_hit_rate_stats, FAIL) H5TRACE1("e", "i", file_id); /* Check args */ if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE))) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file ID") /* Reset the hit rate statistic */ if(H5AC_reset_cache_hit_rate_stats(file->shared->cache) < 0) HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "can't reset cache hit rate") done: FUNC_LEAVE_API(ret_value) } /* H5Freset_mdc_hit_rate_stats() */ /*------------------------------------------------------------------------- * Function: H5Fget_name * * Purpose: Gets the name of the file to which object OBJ_ID belongs. * If `name' is non-NULL then write up to `size' bytes into that * buffer and always return the length of the entry name. * Otherwise `size' is ignored and the function does not store the name, * just returning the number of characters required to store the name. * If an error occurs then the buffer pointed to by `name' (NULL or non-NULL) * is unchanged and the function returns a negative value. * * Return: Success: The length of the file name * Failure: Negative * * Programmer: Raymond Lu * June 29, 2004 * *------------------------------------------------------------------------- */ ssize_t H5Fget_name(hid_t obj_id, char *name/*out*/, size_t size) { H5F_t *f; /* Top file in mount hierarchy */ size_t len; ssize_t ret_value; FUNC_ENTER_API (H5Fget_name, FAIL) H5TRACE3("Zs", "ixz", obj_id, name, size); /* For file IDs, get the file object directly */ /* (This prevents the H5G_loc() call from returning the file pointer for * the top file in a mount hierarchy) */ if(H5I_get_type(obj_id) == H5I_FILE ) { if(NULL == (f = (H5F_t *)H5I_object(obj_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file") } /* end if */ else { H5G_loc_t loc; /* Object location */ /* Get symbol table entry */ if(H5G_loc(obj_id, &loc) < 0) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a valid object ID") f = loc.oloc->file; } /* end else */ len = HDstrlen(f->name); if(name) { HDstrncpy(name, f->name, MIN(len+1,size)); if(len >= size) name[size-1]='\0'; } /* end if */ /* Set return value */ ret_value = (ssize_t)len; done: FUNC_LEAVE_API(ret_value) } /* end H5Fget_name() */ /*------------------------------------------------------------------------- * Function: H5Fget_info * 1. Get storage size for superblock extension if there is one * 2. Get the amount of btree and heap storage for entries * in the SOHM table if there is one. * Consider success when there is no superblock extension and/or SOHM table * * Return: Success: non-negative on success * Failure: Negative * * Programmer: Vailin Choi * July 11, 2007 * *------------------------------------------------------------------------- */ herr_t H5Fget_info(hid_t obj_id, H5F_info_t *finfo) { H5F_t *f; /* Top file in mount hierarchy */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_API(H5Fget_info, FAIL) H5TRACE2("e", "i*x", obj_id, finfo); /* Check args */ if(!finfo) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no info struct") /* For file IDs, get the file object directly */ /* (This prevents the H5G_loc() call from returning the file pointer for * the top file in a mount hierarchy) */ if(H5I_get_type(obj_id) == H5I_FILE ) { if(NULL == (f = (H5F_t *)H5I_object(obj_id))) HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file") } /* end if */ else { H5G_loc_t loc; /* Object location */ /* Get symbol table entry */ if(H5G_loc(obj_id, &loc) < 0) HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a valid object ID") f = loc.oloc->file; } /* end else */ HDassert(f->shared); /* Reset file info struct */ HDmemset(finfo, 0, sizeof(H5F_info_t)); /* Check for superblock extension info */ if(H5F_super_size(f, H5AC_ind_dxpl_id, NULL, &finfo->super_ext_size) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "Unable to retrieve superblock extension size") /* Check for SOHM info */ if(H5F_addr_defined(f->shared->sohm_addr)) if(H5SM_ih_size(f, H5AC_ind_dxpl_id, finfo) < 0) HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "Unable to retrieve SOHM btree & heap storage info") done: FUNC_LEAVE_API(ret_value) } /* end H5Fget_info() */