diff options
Diffstat (limited to 'src/H5VL.c')
| -rw-r--r-- | src/H5VL.c | 101 |
1 files changed, 101 insertions, 0 deletions
@@ -29,9 +29,11 @@ /***********/ #include "H5private.h" /* Generic Functions */ +#include "H5CXprivate.h" /* API Contexts */ #include "H5Eprivate.h" /* Error handling */ #include "H5Iprivate.h" /* IDs */ #include "H5Pprivate.h" /* Property lists */ +#include "H5Tprivate.h" /* Datatypes */ #include "H5VLpkg.h" /* Virtual Object Layer */ /* VOL connectors */ @@ -279,6 +281,38 @@ done: /*------------------------------------------------------------------------- + * Function: H5VLpeek_connector_id + * + * Purpose: Retrieves the ID for a registered VOL connector. + * + * Return: A valid VOL connector ID if a connector by that name has + * been registered. This ID is *not* owned by the caller and + * H5VLclose() should not be called. Intended for use by VOL + * connectors to find their own ID. + * + * H5I_INVALID_HID on error or if a VOL connector of that + * name has not been registered. + * + *------------------------------------------------------------------------- + */ +hid_t +H5VLpeek_connector_id(const char *name) +{ + hid_t ret_value = H5I_INVALID_HID; /* Return value */ + + FUNC_ENTER_API(H5I_INVALID_HID) + H5TRACE1("i", "*s", name); + + /* Get connector ID with this name */ + if((ret_value = H5VL__peek_connector_id(name)) < 0) + HGOTO_ERROR(H5E_VOL, H5E_CANTGET, H5I_INVALID_HID, "can't get VOL id") + +done: + FUNC_LEAVE_API(ret_value) +} /* end H5VLpeek_connector_id() */ + + +/*------------------------------------------------------------------------- * Function: H5VLget_connector_name * * Purpose: Returns the connector name for the VOL associated with the @@ -503,6 +537,73 @@ done: } /* H5VLobject() */ +/*------------------------------------------------------------------------- + * Function: H5VLget_file_type + * + * Purpose: Returns a copy of dtype_id with its location set to be in + * the file, with updated size, etc. + * + * Return: Non-negative on success/Negative on failure + * + *------------------------------------------------------------------------- + */ +hid_t +H5VLget_file_type(void *file_obj, hid_t connector_id, hid_t dtype_id) +{ + H5T_t *dtype; /* unatomized type */ + H5T_t *file_type = NULL; /* copied file type */ + hid_t file_type_id = -1; /* copied file type id */ + H5VL_object_t *file_vol_obj = NULL; /* VOL object for file */ + hid_t ret_value = -1; /* Return value */ + + FUNC_ENTER_API(FAIL) + H5TRACE3("i", "*xii", file_obj, connector_id, dtype_id); + + /* Check args */ + if(!file_obj) + HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "no file object supplied") + if(NULL == (dtype = (H5T_t *)H5I_object_verify(dtype_id, H5I_DATATYPE))) + HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type") + + /* Create VOL object for file */ + if(NULL == (file_vol_obj = H5VL_create_object_using_vol_id(H5I_FILE, file_obj, connector_id))) + HGOTO_ERROR(H5E_VOL, H5E_CANTCREATE, FAIL, "can't create VOL object") + + /* Copy the datatype */ + if(NULL == (file_type = H5T_copy(dtype, H5T_COPY_TRANSIENT))) + HGOTO_ERROR(H5E_VOL, H5E_CANTCOPY, FAIL, "unable to copy datatype") + + /* Register file type id */ + if((file_type_id = H5I_register(H5I_DATATYPE, file_type, FALSE)) < 0) { + (void)H5T_close_real(file_type); + HGOTO_ERROR(H5E_VOL, H5E_CANTREGISTER, FAIL, "unable to register file datatype") + } /* end if */ + + /* Set the location of the datatype to be in the file */ + if(H5T_set_loc(file_type, file_vol_obj, H5T_LOC_DISK) < 0) + HGOTO_ERROR(H5E_VOL, H5E_CANTINIT, FAIL, "can't set datatype location") + + /* file_type now owns file_vol_obj */ + if(H5T_own_vol_obj(file_type, file_vol_obj) < 0) + HGOTO_ERROR(H5E_VOL, H5E_CANTINIT, FAIL, "can't give ownership of VOL object") + file_vol_obj = NULL; + + /* Set return value */ + ret_value = file_type_id; + +done: + /* Cleanup on error */ + if(ret_value < 0) { + if(file_vol_obj && H5VL_free_object(file_vol_obj) < 0) + HDONE_ERROR(H5E_VOL, H5E_CANTDEC, FAIL, "unable to free VOL object") + if(file_type_id >= 0 && H5I_dec_ref(file_type_id) < 0) + HDONE_ERROR(H5E_VOL, H5E_CANTDEC, FAIL, "unable to close file datatype") + } /* end if */ + + FUNC_LEAVE_API(ret_value) +} /* end H5VLget_file_type() */ + + /*--------------------------------------------------------------------------- * Function: H5VLretrieve_lib_state * |