/*------------------------------------------------------------------------- * Function: H5G__create * * Purpose: Creates a new empty group with the specified name. The name * is either an absolute name or is relative to LOC. * * Return: Success: A handle for the group. The group is opened * and should eventually be close by calling * H5G_close(). * * Failure: NULL * * Programmer: Robb Matzke * [email protected] * Aug 11 1997 * *------------------------------------------------------------------------- */ H5G_t * H5G__create(H5F_t *file, H5G_obj_create_t *gcrt_info, hid_t dxpl_id) { H5G_t *grp = NULL; /*new group */ unsigned oloc_init = 0; /* Flag to indicate that the group object location was created successfully */ H5G_t *ret_value = NULL; /* Return value */ FUNC_ENTER_PACKAGE /* check args */ HDassert(file); HDassert(gcrt_info->gcpl_id != H5P_DEFAULT); HDassert(dxpl_id != H5P_DEFAULT); /* create an open group */ if(NULL == (grp = H5FL_CALLOC(H5G_t))) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed") if(NULL == (grp->shared = H5FL_CALLOC(H5G_shared_t))) HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed") /* Create the group object header */ if(H5G__obj_create(file, dxpl_id, gcrt_info, &(grp->oloc)/*out*/) < 0) HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, NULL, "unable to create group object header") oloc_init = 1; /* Indicate that the object location information is valid */ /* Add group to list of open objects in file */ if(H5FO_top_incr(grp->oloc.file, grp->oloc.addr) < 0) HGOTO_ERROR(H5E_SYM, H5E_CANTINC, NULL, "can't incr object ref. count") if(H5FO_insert(grp->oloc.file, grp->oloc.addr, grp->shared, TRUE) < 0) HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, NULL, "can't insert group into list of open objects") /* Set the count of times the object is opened */ grp->shared->fo_count = 1; /* Set return value */ ret_value = grp; done: if(ret_value == NULL) { /* Check if we need to release the file-oriented symbol table info */ if(oloc_init) { if(H5O_dec_rc_by_loc(&(grp->oloc), dxpl_id) < 0) HDONE_ERROR(H5E_SYM, H5E_CANTDEC, NULL, "unable to decrement refcount on newly created object") if(H5O_close(&(grp->oloc)) < 0) HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, NULL, "unable to release object header") if(H5O_delete(file, dxpl_id, grp->oloc.addr) < 0) HDONE_ERROR(H5E_SYM, H5E_CANTDELETE, NULL, "unable to delete object header") } /* end if */ if(grp != NULL) { if(grp->shared != NULL) grp->shared = H5FL_FREE(H5G_shared_t, grp->shared); grp = H5FL_FREE(H5G_t, grp); } /* end if */ } /* end if */ FUNC_LEAVE_NOAPI(ret_value) } /* end H5G__create() */
/* * Verify that object headers are held in the cache until they are linked * to a location in the graph, or assigned an ID. This is done by * creating an object header, then forcing it out of the cache by creating * local heaps until the object header is evicted from the cache, then * modifying the object header. The refcount on the object header is * checked as verifying that the object header has remained in the cache. */ static herr_t test_ohdr_cache(char *filename, hid_t fapl) { hid_t file = -1; /* File ID */ hid_t my_fapl; /* FAPL ID */ hid_t my_dxpl; /* DXPL ID */ H5AC_cache_config_t mdc_config; /* Metadata cache configuration info */ H5F_t *f = NULL; /* File handle */ H5HL_t *lheap, *lheap2, *lheap3; /* Pointer to local heaps */ haddr_t lheap_addr, lheap_addr2, lheap_addr3; /* Local heap addresses */ H5O_loc_t oh_loc; /* Object header location */ time_t time_new; /* Time value for modification time message */ unsigned rc; /* Refcount for object */ TESTING("object header creation in cache"); /* Make a copy of the FAPL */ if((my_fapl = H5Pcopy(fapl)) < 0) FAIL_STACK_ERROR /* Tweak down the size of the metadata cache to only 64K */ mdc_config.version = H5AC__CURR_CACHE_CONFIG_VERSION; if(H5Pget_mdc_config(my_fapl, &mdc_config) < 0) FAIL_STACK_ERROR mdc_config.set_initial_size = TRUE; mdc_config.initial_size = 32 * 1024; mdc_config.max_size = 64 * 1024; mdc_config.min_size = 8 * 1024; if(H5Pset_mdc_config(my_fapl, &mdc_config) < 0) FAIL_STACK_ERROR /* Make a copy of the default DXPL */ if((my_dxpl = H5Pcopy(H5P_DATASET_XFER_DEFAULT)) < 0) FAIL_STACK_ERROR /* Create the file to operate on */ if((file = H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, my_fapl)) < 0) FAIL_STACK_ERROR if(H5Pclose(my_fapl) < 0) FAIL_STACK_ERROR if(NULL == (f = (H5F_t *)H5I_object(file))) FAIL_STACK_ERROR if(H5AC_ignore_tags(f) < 0) FAIL_STACK_ERROR /* Create object (local heap) that occupies most of cache */ if(H5HL_create(f, my_dxpl, (31 * 1024), &lheap_addr) < 0) FAIL_STACK_ERROR /* Protect local heap (which actually pins it in the cache) */ if(NULL == (lheap = H5HL_protect(f, my_dxpl, lheap_addr, H5AC__READ_ONLY_FLAG))) FAIL_STACK_ERROR /* Create an object header */ HDmemset(&oh_loc, 0, sizeof(oh_loc)); if(H5O_create(f, my_dxpl, (size_t)2048, (size_t)1, H5P_GROUP_CREATE_DEFAULT, &oh_loc/*out*/) < 0) FAIL_STACK_ERROR /* Query object header information */ rc = 0; if(H5O_get_rc(&oh_loc, my_dxpl, &rc) < 0) FAIL_STACK_ERROR if(0 != rc) TEST_ERROR /* Create object (local heap) that occupies most of cache */ if(H5HL_create(f, my_dxpl, (31 * 1024), &lheap_addr2) < 0) FAIL_STACK_ERROR /* Protect local heap (which actually pins it in the cache) */ if(NULL == (lheap2 = H5HL_protect(f, my_dxpl, lheap_addr2, H5AC__READ_ONLY_FLAG))) FAIL_STACK_ERROR /* Unprotect local heap (which actually unpins it from the cache) */ if(H5HL_unprotect(lheap2) < 0) FAIL_STACK_ERROR /* Create object header message in new object header */ time_new = 11111111; if(H5O_msg_create(&oh_loc, H5O_MTIME_NEW_ID, 0, 0, &time_new, my_dxpl) < 0) FAIL_STACK_ERROR /* Create object (local heap) that occupies most of cache */ if(H5HL_create(f, my_dxpl, (31 * 1024), &lheap_addr3) < 0) FAIL_STACK_ERROR /* Protect local heap (which actually pins it in the cache) */ if(NULL == (lheap3 = H5HL_protect(f, my_dxpl, lheap_addr3, H5AC__READ_ONLY_FLAG))) FAIL_STACK_ERROR /* Unprotect local heap (which actually unpins it from the cache) */ if(H5HL_unprotect(lheap3) < 0) FAIL_STACK_ERROR /* Query object header information */ /* (Note that this is somewhat of a weak test, since it doesn't actually * verify that the object header was evicted from the cache, but it's * very difficult to verify when an entry is evicted from the cache in * a non-invasive way -QAK) */ rc = 0; if(H5O_get_rc(&oh_loc, my_dxpl, &rc) < 0) FAIL_STACK_ERROR if(0 != rc) TEST_ERROR /* Decrement reference count o object header */ if(H5O_dec_rc_by_loc(&oh_loc, my_dxpl) < 0) FAIL_STACK_ERROR /* Close object header created */ if(H5O_close(&oh_loc) < 0) FAIL_STACK_ERROR /* Unprotect local heap (which actually unpins it from the cache) */ if(H5HL_unprotect(lheap) < 0) FAIL_STACK_ERROR if(H5Pclose(my_dxpl) < 0) FAIL_STACK_ERROR if(H5Fclose(file) < 0) FAIL_STACK_ERROR PASSED(); return 0; error: H5E_BEGIN_TRY { H5Fclose(file); } H5E_END_TRY; return -1; } /* test_ohdr_cache() */