/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have * * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /*------------------------------------------------------------------------- * * Created: H5HF.c * Feb 24 2006 * Quincey Koziol * * Purpose: Implements a "fractal heap" for storing variable- * length objects in a file. * * Please see the documentation in: * doc/html/TechNotes/FractalHeap.html for a full description * of how they work, etc. * *------------------------------------------------------------------------- */ /****************/ /* Module Setup */ /****************/ #define H5HF_PACKAGE /*suppress error about including H5HFpkg */ /***********/ /* Headers */ /***********/ #include "H5private.h" /* Generic Functions */ #include "H5Eprivate.h" /* Error handling */ #include "H5HFpkg.h" /* Fractal heaps */ #include "H5MFprivate.h" /* File memory management */ /****************/ /* Local Macros */ /****************/ /******************/ /* Local Typedefs */ /******************/ /********************/ /* Package Typedefs */ /********************/ /********************/ /* Local Prototypes */ /********************/ /*********************/ /* Package Variables */ /*********************/ /* Declare a free list to manage the H5HF_t struct */ H5FL_DEFINE(H5HF_t); /*****************************/ /* Library Private Variables */ /*****************************/ /*******************/ /* Local Variables */ /*******************/ /*------------------------------------------------------------------------- * Function: H5HF_create * * Purpose: Creates a new empty fractal heap in the file. * * Return: Non-negative on success (with address of new fractal heap * filled in), negative on failure * * Programmer: Quincey Koziol * koziol@ncsa.uiuc.edu * Feb 24 2006 * *------------------------------------------------------------------------- */ herr_t H5HF_create(H5F_t *f, hid_t dxpl_id, H5HF_create_t *cparam, haddr_t *addr_p) { H5HF_t *fh = NULL; /* The new fractal heap header information */ herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI(H5HF_create, FAIL) /* * Check arguments. */ HDassert(f); HDassert(cparam); HDassert(addr_p); /* * Allocate file and memory data structures. */ if(NULL == (fh = H5FL_MALLOC(H5HF_t))) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for fractal heap header") /* Reset the metadata cache info for the heap header */ HDmemset(&fh->cache_info, 0, sizeof(H5AC_info_t)); /* Allocate space for the header on disk */ if(HADDR_UNDEF == (*addr_p = H5MF_alloc(f, H5FD_MEM_FHEAP_HDR, dxpl_id, (hsize_t)H5HF_HEADER_SIZE(f)))) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap header") /* Initialize shared fractal heap info */ if(H5HF_shared_create(f, fh, *addr_p, cparam) < 0) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't create shared fractal heap info") /* Cache the new fractal heap header */ if(H5AC_set(f, dxpl_id, H5AC_FHEAP_HDR, *addr_p, fh, H5AC__NO_FLAGS_SET) < 0) HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't add fractal heap header to cache") done: if(ret_value < 0) { if(fh) (void)H5HF_cache_hdr_dest(f, fh); } /* end if */ FUNC_LEAVE_NOAPI(ret_value) } /* end H5HF_create() */ /*------------------------------------------------------------------------- * Function: H5HF_insert * * Purpose: Insert a new object into a fractal heap. * * Return: Non-negative on success (with heap ID of new object * filled in), negative on failure * * Programmer: Quincey Koziol * koziol@ncsa.uiuc.edu * Feb 24 2006 * *------------------------------------------------------------------------- */ herr_t H5HF_insert(H5F_t *f, hid_t dxpl_id, haddr_t addr, size_t size, const void *obj, void *id/*out*/) { H5HF_t *fh = NULL; /* The fractal heap header information */ H5HF_shared_t *shared; /* Shared fractal heap information */ unsigned hdr_flags = H5AC__NO_FLAGS_SET; /* Metadata cache flags for header */ herr_t ret_value = SUCCEED; FUNC_ENTER_NOAPI(H5HF_insert, FAIL) #ifdef QAK HDfprintf(stderr, "%s: size = %Zu\n", FUNC, size); #endif /* QAK */ /* * Check arguments. */ HDassert(f); HDassert(H5F_addr_defined(addr)); HDassert(size > 0); HDassert(obj); HDassert(id); /* * Load the fractal heap header. */ if(NULL == (fh = H5AC_protect(f, dxpl_id, H5AC_FHEAP_HDR, addr, NULL, NULL, H5AC_WRITE))) HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, FAIL, "unable to load fractal heap header") /* Get the pointer to the shared fractal heap info */ shared = H5RC_GET_OBJ(fh->shared); HDassert(shared); /* Check if object is large enough to be standalone */ if(size >= shared->standalone_size) { HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "standalone blocks not supported yet") } /* end if */ else { /* Check if we are in "append only" mode, or if there's enough room for the object */ if(shared->write_once) { HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "'write once' managed blocks not supported yet") } /* end if */ else { H5HF_section_free_node_t *sec_node; /* Pointer to free space section */ /* Find free space in heap */ if(H5HF_man_find(fh->shared, dxpl_id, size, &sec_node) < 0) HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate space in fractal heap") /* Use free space for allocating object */ if(H5HF_man_insert(fh->shared, dxpl_id, sec_node, size, obj, id) < 0) HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate space for object in fractal heap") } /* end else */ } /* end else */ /* Check for making header dirty */ if(shared->dirty) hdr_flags |= H5AC__DIRTIED_FLAG; done: if(fh && H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_HDR, addr, fh, hdr_flags) < 0) HDONE_ERROR(H5E_HEAP, H5E_PROTECT, FAIL, "unable to release fractal heap header") FUNC_LEAVE_NOAPI(ret_value) } /* end H5HF_insert() */ /*------------------------------------------------------------------------- * Function: H5HF_read * * Purpose: Read an object from a fractal heap into a buffer * * Return: SUCCEED/FAIL * * Programmer: Quincey Koziol * koziol@ncsa.uiuc.edu * Mar 18 2006 * *------------------------------------------------------------------------- */ herr_t H5HF_read(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_id, void *obj/*out*/) { H5HF_t *fh = NULL; /* The fractal heap header information */ H5HF_shared_t *shared; /* Shared fractal heap information */ const uint8_t *id = (const uint8_t *)_id; /* Object ID */ hsize_t obj_off; /* Object's offset in heap */ herr_t ret_value = SUCCEED; FUNC_ENTER_NOAPI(H5HF_read, FAIL) /* * Check arguments. */ HDassert(f); HDassert(H5F_addr_defined(addr)); HDassert(id); HDassert(obj); /* * Load the fractal heap header. */ if(NULL == (fh = H5AC_protect(f, dxpl_id, H5AC_FHEAP_HDR, addr, NULL, NULL, H5AC_READ))) HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, FAIL, "unable to load fractal heap header") /* Get the pointer to the shared fractal heap info */ shared = H5RC_GET_OBJ(fh->shared); HDassert(shared); /* Decode the offset within the heap */ UINT64DECODE_VAR(id, obj_off, shared->heap_off_size); #ifdef QAK HDfprintf(stderr, "%s: obj_off = %Hu\n", FUNC, obj_off); #endif /* QAK */ /* Check for standalone object */ if(obj_off & 0) { HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "standalone blocks not supported yet") } /* end if */ else { /* Read object from managed heap blocks */ if(H5HF_man_read(fh->shared, dxpl_id, obj_off, obj) < 0) HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't read object from fractal heap") } /* end else */ done: if(fh && H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_HDR, addr, fh, H5AC__NO_FLAGS_SET) < 0) HDONE_ERROR(H5E_HEAP, H5E_PROTECT, FAIL, "unable to release fractal heap header") FUNC_LEAVE_NOAPI(ret_value) } /* end H5HF_read() */