diff options
Diffstat (limited to 'src/H5FD.c')
| -rw-r--r-- | src/H5FD.c | 82 |
1 files changed, 66 insertions, 16 deletions
@@ -70,6 +70,10 @@ static herr_t H5FD_pl_copy(void *(*copy_func)(const void *), size_t pl_size, static herr_t H5FD_pl_close(hid_t driver_id, herr_t (*free_func)(void *), void *pl); static herr_t H5FD_free_cls(H5FD_class_t *cls); +static herr_t H5FD_fapl_copy(hid_t driver_id, const void *fapl, void **copied_fapl); +static herr_t H5FD_dxpl_copy(hid_t driver_id, const void *dxpl, void **copied_dxpl); +static int H5FD_query(const H5FD_t *f, unsigned long *flags/*out*/); +static int H5FD_driver_query(const H5FD_class_t *driver, unsigned long *flags/*out*/); /*********************/ /* Package Variables */ @@ -750,17 +754,15 @@ done: * Programmer: Robb Matzke * Tuesday, August 3, 1999 * - * Modifications: - * *------------------------------------------------------------------------- */ -herr_t +static herr_t H5FD_fapl_copy(hid_t driver_id, const void *old_fapl, void **copied_fapl) { H5FD_class_t *driver; herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_NOAPI(FAIL) + FUNC_ENTER_NOAPI_NOINIT /* Check args */ if(NULL == (driver = (H5FD_class_t *)H5I_object(driver_id))) @@ -871,17 +873,15 @@ done: * Programmer: Robb Matzke * Tuesday, August 3, 1999 * - * Modifications: - * *------------------------------------------------------------------------- */ -herr_t +static herr_t H5FD_dxpl_copy(hid_t driver_id, const void *old_dxpl, void **copied_dxpl) { H5FD_class_t *driver; herr_t ret_value = SUCCEED; /* Return value */ - FUNC_ENTER_NOAPI(FAIL) + FUNC_ENTER_NOAPI_NOINIT /* Check args */ if(NULL == (driver = (H5FD_class_t *)H5I_object(driver_id))) @@ -1039,6 +1039,8 @@ H5FD_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr) H5FD_t *file = NULL; /* VFD file struct */ hid_t driver_id = -1; /* VFD ID */ H5P_genplist_t *plist; /* Property list pointer */ + unsigned long driver_flags = 0; /* File-inspecific driver feature flags */ + H5FD_file_image_info_t file_image_info; /* Initial file image */ H5FD_t *ret_value; /* Return value */ FUNC_ENTER_NOAPI(NULL) @@ -1061,6 +1063,19 @@ H5FD_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr) if(NULL == driver->open) HGOTO_ERROR(H5E_VFL, H5E_UNSUPPORTED, NULL, "file driver has no `open' method") + /* Query driver flag */ + H5FD_driver_query(driver, &driver_flags); + + /* Get initial file image info */ + if(H5P_get(plist, H5F_ACS_FILE_IMAGE_INFO_NAME, &file_image_info) < 0) + HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get file image info") + + /* If an image is provided, make sure the driver supports this feature */ + HDassert(((file_image_info.buffer != NULL) && (file_image_info.size > 0)) || + ((file_image_info.buffer == NULL) && (file_image_info.size == 0))); + if((file_image_info.buffer != NULL) && !(driver_flags & H5FD_FEAT_ALLOW_FILE_IMAGE)) + HGOTO_ERROR(H5E_VFL, H5E_UNSUPPORTED, NULL, "file image set, but not supported.") + /* Dispatch to file driver */ if(HADDR_UNDEF == maxaddr) maxaddr = driver->maxaddr; @@ -1318,19 +1333,17 @@ done: * Programmer: Quincey Koziol * Friday, August 25, 2000 * - * Modifications: - * *------------------------------------------------------------------------- */ -int +static int H5FD_query(const H5FD_t *f, unsigned long *flags/*out*/) { - int ret_value=0; + int ret_value = 0; /* Return value */ - FUNC_ENTER_NOAPI(FAIL) + FUNC_ENTER_NOAPI_NOINIT - assert(f); - assert(flags); + HDassert(f); + HDassert(flags); /* Check for query driver and call it */ if(f->cls->query) @@ -1340,7 +1353,44 @@ H5FD_query(const H5FD_t *f, unsigned long *flags/*out*/) done: FUNC_LEAVE_NOAPI(ret_value) -} +} /* end H5FD_query() */ + + +/*------------------------------------------------------------------------- +* Function: H5FD_driver_query +* +* Purpose: Similar to H5FD_query(), but intended for cases when we don't +* have a file available (e.g. before one is opened). Since we +* can't use the file to get the driver, the driver is passed in +* as a parameter. +* +* Return: Success: non-negative +* Failure: negative +* +* Programmer: Jacob Gruber +* Wednesday, August 17, 2011 +* +*------------------------------------------------------------------------- +*/ +static int +H5FD_driver_query(const H5FD_class_t *driver, unsigned long *flags/*out*/) +{ + int ret_value = 0; /* Return value */ + + FUNC_ENTER_NOAPI_NOINIT + + HDassert(driver); + HDassert(flags); + + /* Check for the driver to query and then query it */ + if(driver->query) + ret_value = (driver->query)(NULL, flags); + else + *flags = 0; + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5FD_driver_query() */ /*------------------------------------------------------------------------- |