Bring change to use array of metadata cache entry classes for H5C_create

instead of array of class names from cache image branch.

23 files changed, 175 insertions, 287 deletions

diff --git a/src/H5AC.c b/src/H5AC.c
index c93ec70..a04b7be 100644
--- a/src/H5AC.c
+++ b/src/H5AC.c
@@ -107,38 +107,42 @@ hbool_t H5_coll_api_sanity_check_g = false;
 /* Local Variables */
 /*******************/
 
-static const char *H5AC_entry_type_names[H5AC_NTYPES] =
-{
-    "B-tree nodes",
-    "symbol table nodes",
-    "local heap prefixes",
-    "local heap data blocks",
-    "global heaps",
-    "object headers",
-    "object header chunks",
-    "v2 B-tree headers",
-    "v2 B-tree internal nodes",
-    "v2 B-tree leaf nodes",
-    "fractal heap headers",
-    "fractal heap direct blocks",
-    "fractal heap indirect blocks",
-    "free space headers",
-    "free space sections",
-    "shared OH message master table",
-    "shared OH message index",
-    "extensible array headers",
-    "extensible array index blocks",
-    "extensible array super blocks",
-    "extensible array data blocks",
-    "extensible array data block pages",
-    "fixed array headers",
-    "fixed array data block",
-    "fixed array data block pages",
-    "superblock",
-    "driver info",
-    "epoch marker",     /* internal to cache only */
-    "proxy entry",
-    "test entry"	/* for testing only -- not used for actual files */
+/* Metadata entry class list */
+
+/* Remember to add new type ID to the H5AC_type_t enum in H5ACprivate.h when
+ *      adding a new class.
+ */
+
+static const H5AC_class_t *const H5AC_class_s[] = {
+    H5AC_BT,                    /* ( 0) B-tree nodes                    */
+    H5AC_SNODE,                 /* ( 1) symbol table nodes              */
+    H5AC_LHEAP_PRFX,            /* ( 2) local heap prefix               */
+    H5AC_LHEAP_DBLK,            /* ( 3) local heap data block           */
+    H5AC_GHEAP,                 /* ( 4) global heap                     */
+    H5AC_OHDR,                  /* ( 5) object header                   */
+    H5AC_OHDR_CHK,              /* ( 6) object header chunk             */
+    H5AC_BT2_HDR,               /* ( 7) v2 B-tree header                */
+    H5AC_BT2_INT,               /* ( 8) v2 B-tree internal node         */
+    H5AC_BT2_LEAF,              /* ( 9) v2 B-tree leaf node             */
+    H5AC_FHEAP_HDR,             /* (10) fractal heap header             */
+    H5AC_FHEAP_DBLOCK,          /* (11) fractal heap direct block       */
+    H5AC_FHEAP_IBLOCK,          /* (12) fractal heap indirect block     */
+    H5AC_FSPACE_HDR,            /* (13) free space header               */
+    H5AC_FSPACE_SINFO,          /* (14) free space sections             */
+    H5AC_SOHM_TABLE,            /* (15) shared object header message master table */
+    H5AC_SOHM_LIST,             /* (16) shared message index stored as a list */
+    H5AC_EARRAY_HDR,            /* (17) extensible array header         */
+    H5AC_EARRAY_IBLOCK,         /* (18) extensible array index block    */
+    H5AC_EARRAY_SBLOCK,         /* (19) extensible array super block    */
+    H5AC_EARRAY_DBLOCK,         /* (20) extensible array data block     */
+    H5AC_EARRAY_DBLK_PAGE,      /* (21) extensible array data block page */
+    H5AC_FARRAY_HDR,            /* (22) fixed array header              */
+    H5AC_FARRAY_DBLOCK,         /* (23) fixed array data block          */
+    H5AC_FARRAY_DBLK_PAGE,      /* (24) fixed array data block page     */
+    H5AC_SUPERBLOCK,            /* (25) file superblock                 */
+    H5AC_DRVRINFO,              /* (26) driver info block (supplements superblock) */
+    H5AC_EPOCH_MARKER,          /* (27) epoch marker - always internal to cache */
+    H5AC_PROXY_ENTRY            /* (28) cache entry proxy               */
 };
 
 
@@ -380,7 +384,7 @@ H5AC_create(const H5F_t *f, H5AC_cache_config_t *config_ptr)
     HDassert(f);
     HDassert(NULL == f->shared->cache);
     HDassert(config_ptr != NULL) ;
-    HDcompile_assert(NELMTS(H5AC_entry_type_names) == H5AC_NTYPES);
+    HDcompile_assert(NELMTS(H5AC_class_s) == H5AC_NTYPES);
     HDcompile_assert(H5C__MAX_NUM_TYPE_IDS == H5AC_NTYPES);
 
     if(H5AC_validate_config(config_ptr) < 0)
@@ -448,19 +452,19 @@ H5AC_create(const H5F_t *f, H5AC_cache_config_t *config_ptr)
             if(aux_ptr->mpi_rank == 0)
                 f->shared->cache = H5C_create(H5AC__DEFAULT_MAX_CACHE_SIZE,
                         H5AC__DEFAULT_MIN_CLEAN_SIZE, (H5AC_NTYPES - 1),
-                        (const char **)H5AC_entry_type_names,
+                        H5AC_class_s,
                         H5AC__check_if_write_permitted, TRUE, H5AC__log_flushed_entry,
                         (void *)aux_ptr);
             else
                 f->shared->cache = H5C_create(H5AC__DEFAULT_MAX_CACHE_SIZE,
                         H5AC__DEFAULT_MIN_CLEAN_SIZE, (H5AC_NTYPES - 1),
-                        (const char **)H5AC_entry_type_names,
+                        H5AC_class_s,
                         H5AC__check_if_write_permitted, TRUE, NULL,
                         (void *)aux_ptr);
         else
             f->shared->cache = H5C_create(H5AC__DEFAULT_MAX_CACHE_SIZE,
                     H5AC__DEFAULT_MIN_CLEAN_SIZE, (H5AC_NTYPES - 1),
-                    (const char **)H5AC_entry_type_names,
+                    H5AC_class_s,
                     H5AC__check_if_write_permitted, TRUE, NULL, NULL);
     } /* end if */
     else {
@@ -471,7 +475,7 @@ H5AC_create(const H5F_t *f, H5AC_cache_config_t *config_ptr)
          */
         f->shared->cache = H5C_create(H5AC__DEFAULT_MAX_CACHE_SIZE,
                 H5AC__DEFAULT_MIN_CLEAN_SIZE, (H5AC_NTYPES - 1),
-                (const char **)H5AC_entry_type_names,
+                H5AC_class_s,
                 H5AC__check_if_write_permitted, TRUE, NULL, NULL);
 #ifdef H5_HAVE_PARALLEL
     } /* end else */
diff --git a/src/H5ACprivate.h b/src/H5ACprivate.h
index d8d73c5..683be2b 100644
--- a/src/H5ACprivate.h
+++ b/src/H5ACprivate.h
@@ -88,7 +88,6 @@ typedef enum {
     H5AC_DRVRINFO_ID,           /* (26) driver info block (supplements superblock)  */
     H5AC_EPOCH_MARKER_ID,       /* (27) epoch marker - always internal to cache     */
     H5AC_PROXY_ENTRY_ID,        /* (28) cache entry proxy                           */
-    H5AC_TEST_ID,               /* (29) test entry -- not used for actual files     */
     H5AC_NTYPES                 /* Number of types, must be last                    */
 } H5AC_type_t;
 
@@ -359,6 +358,37 @@ H5_DLLVAR hid_t H5AC_rawdata_dxpl_id;
 #define H5AC_ES__IS_CORKED              0x0040
 #define H5AC_ES__IMAGE_IS_UP_TO_DATE    0x0080
 
+/* Metadata entry class declarations */
+H5_DLLVAR const H5AC_class_t H5AC_BT[1];
+H5_DLLVAR const H5AC_class_t H5AC_SNODE[1];
+H5_DLLVAR const H5AC_class_t H5AC_LHEAP_PRFX[1];
+H5_DLLVAR const H5AC_class_t H5AC_LHEAP_DBLK[1];
+H5_DLLVAR const H5AC_class_t H5AC_GHEAP[1];
+H5_DLLVAR const H5AC_class_t H5AC_OHDR[1];
+H5_DLLVAR const H5AC_class_t H5AC_OHDR_CHK[1];
+H5_DLLVAR const H5AC_class_t H5AC_BT2_HDR[1];
+H5_DLLVAR const H5AC_class_t H5AC_BT2_INT[1];
+H5_DLLVAR const H5AC_class_t H5AC_BT2_LEAF[1];
+H5_DLLVAR const H5AC_class_t H5AC_FHEAP_HDR[1];
+H5_DLLVAR const H5AC_class_t H5AC_FHEAP_DBLOCK[1];
+H5_DLLVAR const H5AC_class_t H5AC_FHEAP_IBLOCK[1];
+H5_DLLVAR const H5AC_class_t H5AC_FSPACE_HDR[1];
+H5_DLLVAR const H5AC_class_t H5AC_FSPACE_SINFO[1];
+H5_DLLVAR const H5AC_class_t H5AC_SOHM_TABLE[1];
+H5_DLLVAR const H5AC_class_t H5AC_SOHM_LIST[1];
+H5_DLLVAR const H5AC_class_t H5AC_EARRAY_HDR[1];
+H5_DLLVAR const H5AC_class_t H5AC_EARRAY_IBLOCK[1];
+H5_DLLVAR const H5AC_class_t H5AC_EARRAY_SBLOCK[1];
+H5_DLLVAR const H5AC_class_t H5AC_EARRAY_DBLOCK[1];
+H5_DLLVAR const H5AC_class_t H5AC_EARRAY_DBLK_PAGE[1];
+H5_DLLVAR const H5AC_class_t H5AC_FARRAY_HDR[1];
+H5_DLLVAR const H5AC_class_t H5AC_FARRAY_DBLOCK[1];
+H5_DLLVAR const H5AC_class_t H5AC_FARRAY_DBLK_PAGE[1];
+H5_DLLVAR const H5AC_class_t H5AC_SUPERBLOCK[1];
+H5_DLLVAR const H5AC_class_t H5AC_DRVRINFO[1];
+H5_DLLVAR const H5AC_class_t H5AC_EPOCH_MARKER[1];
+H5_DLLVAR const H5AC_class_t H5AC_PROXY_ENTRY[1];
+
 
 /* external function declarations: */
 
diff --git a/src/H5B2pkg.h b/src/H5B2pkg.h
index 7b1ec4d..71fdfde 100644
--- a/src/H5B2pkg.h
+++ b/src/H5B2pkg.h
@@ -307,15 +307,6 @@ typedef struct H5B2_node_info_test_t {
 /* Package Private Variables */
 /*****************************/
 
-/* H5B2 header inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_BT2_HDR[1];
-
-/* H5B2 internal node inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_BT2_INT[1];
-
-/* H5B2 leaf node inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_BT2_LEAF[1];
-
 /* Declare a free list to manage the H5B2_internal_t struct */
 H5FL_EXTERN(H5B2_internal_t);
 
diff --git a/src/H5Bpkg.h b/src/H5Bpkg.h
index 41e0951..fb93b8a 100644
--- a/src/H5Bpkg.h
+++ b/src/H5Bpkg.h
@@ -73,9 +73,6 @@ typedef struct H5B_cache_ud_t {
 /* Package Private Variables */
 /*****************************/
 
-/* H5B header inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_BT[1];
-
 /* Declare a free list to manage the haddr_t sequence information */
 H5FL_SEQ_EXTERN(haddr_t);
 
diff --git a/src/H5C.c b/src/H5C.c
index 862bee4..2d1dc4d 100644
--- a/src/H5C.c
+++ b/src/H5C.c
@@ -243,7 +243,7 @@ H5C_t *
 H5C_create(size_t		      max_cache_size,
            size_t		      min_clean_size,
            int			      max_type_id,
-           const char *		      (* type_name_table_ptr),
+           const H5C_class_t * const * class_table_ptr,
            H5C_write_permitted_func_t check_write_permitted,
            hbool_t		      write_permitted,
            H5C_log_flush_func_t       log_flush,
@@ -261,11 +261,11 @@ H5C_create(size_t		      max_cache_size,
 
     HDassert( max_type_id >= 0 );
     HDassert( max_type_id < H5C__MAX_NUM_TYPE_IDS );
-    HDassert( type_name_table_ptr );
+    HDassert( class_table_ptr );
 
     for ( i = 0; i <= max_type_id; i++ ) {
-        HDassert( (type_name_table_ptr)[i] );
-        HDassert( HDstrlen(( type_name_table_ptr)[i]) > 0 );
+        HDassert( (class_table_ptr)[i] );
+        HDassert(HDstrlen((class_table_ptr)[i]->name) > 0);
     } /* end for */
 
     if(NULL == (cache_ptr = H5FL_CALLOC(H5C_t)))
@@ -297,7 +297,7 @@ H5C_create(size_t		      max_cache_size,
 
     cache_ptr->max_type_id			= max_type_id;
 
-    cache_ptr->type_name_table_ptr		= type_name_table_ptr;
+    cache_ptr->class_table_ptr			= class_table_ptr;
 
     cache_ptr->max_cache_size			= max_cache_size;
     cache_ptr->min_clean_size			= min_clean_size;
@@ -434,7 +434,7 @@ H5C_create(size_t		      max_cache_size,
         ((cache_ptr->epoch_markers)[i]).magic		 =
 					       H5C__H5C_CACHE_ENTRY_T_MAGIC;
         ((cache_ptr->epoch_markers)[i]).addr		 = (haddr_t)i;
-        ((cache_ptr->epoch_markers)[i]).type		 = &H5C__epoch_marker_class;
+        ((cache_ptr->epoch_markers)[i]).type		 = H5AC_EPOCH_MARKER;
     }
 
     cache_ptr->entries_loaded_counter		= 0;
@@ -2304,32 +2304,6 @@ done:
  *
  * Programmer:  John Mainzer -  6/2/04
  *
- * 		JRM -- 11/13/08
- * 		Modified function to call H5C_make_space_in_cache() when
- * 		the min_clean_size is violated, not just when there isn't
- * 		enough space for and entry that has just been loaded.
- *
- *              The purpose of this modification is to avoid "metadata
- *              blizzards" in the write only case.  In such instances,
- *              the cache was allowed to fill with dirty metadata.  When
- *              we finally needed to evict an entry to make space, we had
- *              to flush out a whole cache full of metadata -- which has
- *              interesting performance effects.  We hope to avoid (or
- *              perhaps more accurately hide) this effect by maintaining
- *              the min_clean_size, which should force us to start flushing
- *              entries long before we actually have to evict something
- *              to make space.
- *
- *		JRM -- 9/1/14
- *		Replace the old rw parameter with the flags parameter.
- *		This allows H5C_protect to accept flags other than 
- *		H5C__READ_ONLY_FLAG.  
- *
- *		Added support for the H5C__FLUSH_LAST_FLAG.
- *		At present, this flag is only applied if the entry is 
- *              not in cache, and is loaded into the cache as a result of 
- *              this call.
- *
  *-------------------------------------------------------------------------
  */
 void *
@@ -6145,34 +6119,6 @@ done:
  *
  * Programmer:  John Mainzer, 5/5/04
  *
- * Changes:	Refactored function to remove the type_ptr parameter.
- *
- *						JRM -- 8/7/14
- *
- *              Added code to check for slist changes in pre_serialize and
- *              serialize calls, and set 
- *              cache_ptr->slist_change_in_pre_serialize and 
- *		cache_ptr->slist_change_in_serialize as appropriate.
- *
- *                                              JRM -- 12/13/14
- *
- *		Refactored function to delay all modifications of the 
- *		metadata cache data structures until after any calls 
- *		to the pre-serialize or serialize callbacks.
- *
- *		Need to do this, as some pre-serialize or serialize 
- *		calls result in calls to the metadata cache and 
- *		modifications to its data structures.  Thus, at the
- *		time of any such call, the target entry flags and 
- *		the metadata cache must all be consistant.
- *
- *		Also added the entry_size_change_ptr parameter, which 
- *              allows the function to report back any change in the size 
- *		of the entry during the flush.  Such size changes may 
- *		occur during the pre-serialize callback.
- *
- *						JRM -- 12/24/14
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -7023,11 +6969,9 @@ done:
  *
  *-------------------------------------------------------------------------
  */
-static herr_t
-H5C_make_space_in_cache(H5F_t *	f,
-                        hid_t	dxpl_id,
-		        size_t	space_needed,
-                        hbool_t	write_permitted)
+herr_t
+H5C_make_space_in_cache(H5F_t *f, hid_t dxpl_id, size_t space_needed,
+    hbool_t	write_permitted)
 {
     H5C_t *		cache_ptr = f->shared->cache;
 #if H5C_COLLECT_CACHE_STATS
@@ -7043,16 +6987,16 @@ H5C_make_space_in_cache(H5F_t *	f,
     H5C_cache_entry_t *	entry_ptr;
     H5C_cache_entry_t *	prev_ptr;
     H5C_cache_entry_t *	next_ptr;
-    int32_t 		num_corked_entries = 0;
+    uint32_t 		num_corked_entries = 0;
     herr_t		ret_value = SUCCEED;      /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
 
-    HDassert( f );
-    HDassert( cache_ptr );
-    HDassert( cache_ptr->magic == H5C__H5C_T_MAGIC );
-    HDassert( cache_ptr->index_size ==
-	      (cache_ptr->clean_index_size + cache_ptr->dirty_index_size) );
+    /* Sanity checks */
+    HDassert(f);
+    HDassert(cache_ptr);
+    HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC);
+    HDassert(cache_ptr->index_size == (cache_ptr->clean_index_size + cache_ptr->dirty_index_size));
 
     if ( write_permitted ) {
 
diff --git a/src/H5Cdbg.c b/src/H5Cdbg.c
index 6ca18b1..7efba23 100644
--- a/src/H5Cdbg.c
+++ b/src/H5Cdbg.c
@@ -673,7 +673,7 @@ H5C_stats(H5C_t * cache_ptr,
 
             HDfprintf(stdout, "%s  Stats on %s:\n",
                       cache_ptr->prefix,
-                      ((cache_ptr->type_name_table_ptr))[i]);
+                      ((cache_ptr->class_table_ptr))[i]->name);
 
             if((cache_ptr->hits[i] > 0) || (cache_ptr->misses[i] > 0))
                 hit_rate = (double)100.0f * ((double)(cache_ptr->hits[i])) /
diff --git a/src/H5Cepoch.c b/src/H5Cepoch.c
index e576028..655d795 100644
--- a/src/H5Cepoch.c
+++ b/src/H5Cepoch.c
@@ -92,8 +92,7 @@ static herr_t H5C__epoch_marker_fsf_size(const void H5_ATTR_UNUSED * thing,
 /*******************/
 
 
-const H5C_class_t H5C__epoch_marker_class =
-{
+const H5AC_class_t H5AC_EPOCH_MARKER[1] = {{
     /* id               = */ H5AC_EPOCH_MARKER_ID,
     /* name             = */ "epoch marker",
     /* mem_type         = */ H5FD_MEM_DEFAULT, /* value doesn't matter */
@@ -108,7 +107,7 @@ const H5C_class_t H5C__epoch_marker_class =
     /* notify           = */ H5C__epoch_marker_notify,
     /* free_icr         = */ H5C__epoch_marker_free_icr,
     /* fsf_size         = */ H5C__epoch_marker_fsf_size,
-};
+}};
 
 
 /***************************************************************************
diff --git a/src/H5Cpkg.h b/src/H5Cpkg.h
index 1523450..f237b7b 100644
--- a/src/H5Cpkg.h
+++ b/src/H5Cpkg.h
@@ -596,23 +596,6 @@ if ( ( ( ( (head_ptr) == NULL ) || ( (tail_ptr) == NULL ) ) &&             \
  * H5C__UPDATE_CACHE_HIT_RATE_STATS(), which is always active as
  * the cache hit rate stats are always collected and available.
  *
- * Changes:
- *
- * 	JRM -- 3/21/06
- * 	Added / updated macros for pinned entry related stats.
- *
- * 	JRM -- 8/9/06
- * 	More pinned entry stats related updates.
- *
- * 	JRM -- 3/31/07
- * 	Updated H5C__UPDATE_STATS_FOR_PROTECT() to keep stats on
- * 	read and write protects.
- *
- *      MAM -- 1/15/09
- *      Created H5C__UPDATE_MAX_INDEX_SIZE_STATS to contain
- *      common code within macros that update the maximum
- *      index, clean_index, and dirty_index statistics fields.
- *
  ***********************************************************************/
 
 #define H5C__UPDATE_CACHE_HIT_RATE_STATS(cache_ptr, hit) \
@@ -3428,10 +3411,8 @@ typedef struct H5C_tag_info_t {
  *		types are stored in the type_name_table discussed below, and
  *		indexed by the ids.
  *
- * type_name_table_ptr: Pointer to an array of pointer to char of length
- *              max_type_id + 1.  The strings pointed to by the entries
- *              in the array are the names of the entry types associated
- *              with the indexing type IDs.
+ * class_table_ptr: Pointer to an array of H5C_class_t of length
+ *              max_type_id + 1.  Entry classes for the cache.
  *
  * max_cache_size:  Nominal maximum number of bytes that may be stored in the
  *              cache.  This value should be viewed as a soft limit, as the
@@ -4377,7 +4358,7 @@ struct H5C_t {
     FILE *			log_file_ptr;
     void *			aux_ptr;
     int32_t			max_type_id;
-    const char *                (* type_name_table_ptr);
+    const H5C_class_t * const   *class_table_ptr;
     size_t                      max_cache_size;
     size_t                      min_clean_size;
     H5C_write_permitted_func_t	check_write_permitted;
@@ -4578,9 +4559,6 @@ typedef int (*H5C_tag_iter_cb_t)(H5C_cache_entry_t *entry, void *ctx);
 /* Package Private Variables */
 /*****************************/
 
-/* Metadata cache epoch class */
-H5_DLLVAR const H5C_class_t H5C__epoch_marker_class;
-
 
 /******************************/
 /* Package Private Prototypes */
diff --git a/src/H5Cprivate.h b/src/H5Cprivate.h
index 2d5b510..d7111a8 100644
--- a/src/H5Cprivate.h
+++ b/src/H5Cprivate.h
@@ -41,7 +41,7 @@
 /**************************/
 
 /* Cache configuration settings */
-#define H5C__MAX_NUM_TYPE_IDS   30
+#define H5C__MAX_NUM_TYPE_IDS   29
 #define H5C__PREFIX_LEN         32
 
 /* This sanity checking constant was picked out of the air.  Increase
@@ -1741,7 +1741,7 @@ typedef struct H5C_auto_size_ctl_t {
 /***************************************/
 
 H5_DLL H5C_t *H5C_create(size_t max_cache_size, size_t min_clean_size,
-    int max_type_id, const char *(*type_name_table_ptr),
+    int max_type_id, const H5C_class_t * const *class_table_ptr,
     H5C_write_permitted_func_t check_write_permitted, hbool_t write_permitted,
     H5C_log_flush_func_t log_flush, void *aux_ptr);
 H5_DLL herr_t H5C_set_up_logging(H5C_t *cache_ptr, const char log_location[], hbool_t start_immediately);
diff --git a/src/H5EApkg.h b/src/H5EApkg.h
index 093403c..7540ff2 100644
--- a/src/H5EApkg.h
+++ b/src/H5EApkg.h
@@ -378,21 +378,6 @@ typedef struct H5EA__ctx_cb_t {
 /* Package Private Variables */
 /*****************************/
 
-/* H5EA header inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_EARRAY_HDR[1];
-
-/* H5EA index block inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_EARRAY_IBLOCK[1];
-
-/* H5EA index block inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_EARRAY_SBLOCK[1];
-
-/* H5EA data block inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_EARRAY_DBLOCK[1];
-
-/* H5EA data block page inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_EARRAY_DBLK_PAGE[1];
-
 /* Internal extensible array testing class */
 H5_DLLVAR const H5EA_class_t H5EA_CLS_TEST[1];
 
diff --git a/src/H5FApkg.h b/src/H5FApkg.h
index ccef562..63eacff 100644
--- a/src/H5FApkg.h
+++ b/src/H5FApkg.h
@@ -249,15 +249,6 @@ typedef struct H5FA_dblk_page_cache_ud_t {
 /* Package Private Variables */
 /*****************************/
 
-/* H5FA header inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_FARRAY_HDR[1];
-
-/* H5FA data block inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_FARRAY_DBLOCK[1];
-
-/* H5FA data block page inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_FARRAY_DBLK_PAGE[1];
-
 /* Internal fixed array testing class */
 H5_DLLVAR const H5FA_class_t H5FA_CLS_TEST[1];
 
diff --git a/src/H5FSpkg.h b/src/H5FSpkg.h
index f07ffad..4411236 100644
--- a/src/H5FSpkg.h
+++ b/src/H5FSpkg.h
@@ -199,12 +199,6 @@ struct H5FS_t {
 /* Package Private Variables */
 /*****************************/
 
-/* H5FS header inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_FSPACE_HDR[1];
-
-/* H5FS section info inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_FSPACE_SINFO[1];
-
 /* Declare a free list to manage the H5FS_node_t struct */
 H5FL_EXTERN(H5FS_node_t);
 
diff --git a/src/H5Fpkg.h b/src/H5Fpkg.h
index 11665f4..c067f26 100644
--- a/src/H5Fpkg.h
+++ b/src/H5Fpkg.h
@@ -369,9 +369,6 @@ H5FL_EXTERN(H5F_t);
 /* Declare a free list to manage the H5F_file_t struct */
 H5FL_EXTERN(H5F_file_t);
 
-H5_DLLVAR const H5AC_class_t H5AC_SUPERBLOCK[1];
-H5_DLLVAR const H5AC_class_t H5AC_DRVRINFO[1];
-
 
 /******************************/
 /* Package Private Prototypes */
diff --git a/src/H5Gpkg.h b/src/H5Gpkg.h
index c994da3..1e8ad31 100644
--- a/src/H5Gpkg.h
+++ b/src/H5Gpkg.h
@@ -312,9 +312,6 @@ typedef struct H5G_copy_file_ud_t {
  */
 H5_DLLVAR H5B_class_t H5B_SNODE[1];
 
-/* The cache subclass */
-H5_DLLVAR const H5AC_class_t H5AC_SNODE[1];
-
 /* The v2 B-tree class for indexing 'name' field on links */
 H5_DLLVAR const H5B2_class_t H5G_BT2_NAME[1];
 
diff --git a/src/H5HFpkg.h b/src/H5HFpkg.h
index 6abae65..9c1d9a6 100644
--- a/src/H5HFpkg.h
+++ b/src/H5HFpkg.h
@@ -559,15 +559,6 @@ typedef struct H5HF_dblock_cache_ud_t {
 /* Package Private Variables */
 /*****************************/
 
-/* H5HF header inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_FHEAP_HDR[1];
-
-/* H5HF indirect block inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_FHEAP_IBLOCK[1];
-
-/* H5HF direct block inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_FHEAP_DBLOCK[1];
-
 /* The v2 B-tree class for tracking indirectly accessed 'huge' objects */
 H5_DLLVAR const H5B2_class_t H5HF_HUGE_BT2_INDIR[1];
 
diff --git a/src/H5HGpkg.h b/src/H5HGpkg.h
index e566ece..a5c80ea 100644
--- a/src/H5HGpkg.h
+++ b/src/H5HGpkg.h
@@ -40,9 +40,6 @@
 /* Package Private Variables */
 /*****************************/
 
-/* The cache subclass */
-H5_DLLVAR const H5AC_class_t H5AC_GHEAP[1];
-
 /* Declare extern the free list to manage the H5HG_t struct */
 H5FL_EXTERN(H5HG_heap_t);
 
diff --git a/src/H5HLpkg.h b/src/H5HLpkg.h
index 7075b2a..06db696 100644
--- a/src/H5HLpkg.h
+++ b/src/H5HLpkg.h
@@ -39,12 +39,6 @@
 /* Package Private Variables */
 /*****************************/
 
-/* The local heap prefix cache subclass */
-H5_DLLVAR const H5AC_class_t H5AC_LHEAP_PRFX[1];
-
-/* The local heap data block cache subclass */
-H5_DLLVAR const H5AC_class_t H5AC_LHEAP_DBLK[1];
-
 /* Declare extern the free list to manage the H5HL_free_t struct */
 H5FL_EXTERN(H5HL_free_t);
 
diff --git a/src/H5Opkg.h b/src/H5Opkg.h
index ef49535..c2866f7 100644
--- a/src/H5Opkg.h
+++ b/src/H5Opkg.h
@@ -419,12 +419,6 @@ typedef struct H5O_chk_cache_ud_t {
 } H5O_chk_cache_ud_t;
 
 
-/* H5O object header inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_OHDR[1];
-
-/* H5O object header chunk inherits cache-like properties from H5AC */
-H5_DLLVAR const H5AC_class_t H5AC_OHDR_CHK[1];
-
 /* Header message ID to class mapping */
 H5_DLLVAR const H5O_msg_class_t *const H5O_msg_class_g[H5O_MSG_TYPES];
 
diff --git a/src/H5SMpkg.h b/src/H5SMpkg.h
index 3b13e23..342543d 100644
--- a/src/H5SMpkg.h
+++ b/src/H5SMpkg.h
@@ -256,8 +256,6 @@ H5FL_ARR_EXTERN(H5SM_index_header_t);
 H5FL_EXTERN(H5SM_list_t);
 H5FL_ARR_EXTERN(H5SM_sohm_t);
 
-H5_DLLVAR const H5AC_class_t H5AC_SOHM_TABLE[1];
-H5_DLLVAR const H5AC_class_t H5AC_SOHM_LIST[1];
 H5_DLLVAR const H5B2_class_t H5SM_INDEX[1];
 
 /****************************/
diff --git a/test/cache.c b/test/cache.c
index 4f097e9..5c95b77 100644
--- a/test/cache.c
+++ b/test/cache.c
@@ -16093,7 +16093,7 @@ check_duplicate_insert_err(void)
             entry_ptr = &(base_addr[0]);
 
             result = H5C_insert_entry(file_ptr, H5AC_ind_read_dxpl_id,
-                                      &(types[0]), entry_ptr->addr,
+                                      types[0], entry_ptr->addr,
                                       (void *)entry_ptr, H5C__NO_FLAGS_SET);
 
             if(result >= 0) {
@@ -16461,7 +16461,7 @@ check_double_protect_err(void)
     if(pass) {
 
         cache_entry_ptr = (H5C_cache_entry_t *)H5C_protect(file_ptr, H5AC_ind_read_dxpl_id,
-			               &(types[0]), entry_ptr->addr,
+			               types[0], entry_ptr->addr,
 				       &entry_ptr->addr, H5C__NO_FLAGS_SET);
 
         if(cache_entry_ptr != NULL) {
@@ -16705,7 +16705,7 @@ check_expunge_entry_errs(void)
     if(pass) {
 
 	result = H5C_expunge_entry(file_ptr, H5AC_ind_read_dxpl_id,
-                &(types[0]), entry_ptr->addr, H5C__NO_FLAGS_SET);
+                types[0], entry_ptr->addr, H5C__NO_FLAGS_SET);
 
         if(result > 0) {
 
@@ -16723,7 +16723,7 @@ check_expunge_entry_errs(void)
     if(pass) {
 
 	result = H5C_expunge_entry(file_ptr, H5AC_ind_read_dxpl_id,
-                &(types[0]), entry_ptr->addr, H5C__NO_FLAGS_SET);
+                types[0], entry_ptr->addr, H5C__NO_FLAGS_SET);
 
         if(result > 0) {
 
@@ -16741,7 +16741,7 @@ check_expunge_entry_errs(void)
     if(pass) {
 
 	result = H5C_expunge_entry(file_ptr, H5AC_ind_read_dxpl_id,
-                &(types[0]), entry_ptr->addr, H5C__NO_FLAGS_SET);
+                types[0], entry_ptr->addr, H5C__NO_FLAGS_SET);
 
         if(result < 0) {
 
@@ -16823,7 +16823,7 @@ check_move_entry_errs(void)
 
     if(pass) {
 
-        result = H5C_move_entry(cache_ptr, &(types[0]),
+        result = H5C_move_entry(cache_ptr, types[0],
                                   entry_0_0_ptr->addr, entry_0_1_ptr->addr);
 
         if(result >= 0) {
@@ -16835,7 +16835,7 @@ check_move_entry_errs(void)
 
     if(pass) {
 
-        result = H5C_move_entry(cache_ptr, &(types[0]),
+        result = H5C_move_entry(cache_ptr, types[0],
                                   entry_0_0_ptr->addr, entry_1_0_ptr->addr);
 
         if(result >= 0) {
@@ -16874,7 +16874,7 @@ check_move_entry_errs(void)
 
     if(pass) {
 
-	result = H5C_move_entry(cache_ptr, &(types[0]), entry_ptr->header.addr, entry_ptr->header.addr + 10);
+	result = H5C_move_entry(cache_ptr, types[0], entry_ptr->header.addr, entry_ptr->header.addr + 10);
 
         if(result >= 0) {
 
@@ -17179,7 +17179,7 @@ check_protect_ro_rw_err(void)
     if(pass) {
 
         thing_ptr = (H5C_cache_entry_t *)H5C_protect(file_ptr, H5AC_ind_read_dxpl_id,
-			         &(types[0]), entry_ptr->addr,
+			         types[0], entry_ptr->addr,
 				 &entry_ptr->addr, H5C__NO_FLAGS_SET);
 
         if(thing_ptr != NULL) {
@@ -17272,13 +17272,13 @@ check_protect_retries(void)
         entry_ptr->verify_ct = 0;
 
 	cache_entry_ptr = (H5C_cache_entry_t *)H5C_protect(file_ptr, H5AC_ind_read_dxpl_id,
-                &(types[type]), entry_ptr->addr, &entry_ptr->addr, H5C__READ_ONLY_FLAG);
+                types[type], entry_ptr->addr, &entry_ptr->addr, H5C__READ_ONLY_FLAG);
 
 	if((cache_entry_ptr != (void *)entry_ptr) ||
              (!(entry_ptr->header.is_protected)) ||
              (!(entry_ptr->header.is_read_only)) ||
              (entry_ptr->header.ro_ref_count <= 0) ||
-             (entry_ptr->header.type != &(types[type])) ||
+             (entry_ptr->header.type != types[type]) ||
              (entry_ptr->size != entry_ptr->header.size) ||
              (entry_ptr->addr != entry_ptr->header.addr) ||
 	     (entry_ptr->verify_ct != entry_ptr->max_verify_ct))  {
@@ -17317,7 +17317,7 @@ check_protect_retries(void)
         entry_ptr->verify_ct = 0;
 
 	cache_entry_ptr = (H5C_cache_entry_t *)H5C_protect(file_ptr, H5AC_ind_read_dxpl_id,
-                &(types[type]), entry_ptr->addr, &entry_ptr->addr, H5C__READ_ONLY_FLAG);
+                types[type], entry_ptr->addr, &entry_ptr->addr, H5C__READ_ONLY_FLAG);
 
 	/* H5C_protect() should fail after all retries fail */
 	if(cache_entry_ptr != NULL)
diff --git a/test/cache_common.c b/test/cache_common.c
index 1321968..59328f7 100644
--- a/test/cache_common.c
+++ b/test/cache_common.c
@@ -288,27 +288,9 @@ const haddr_t alt_base_addrs[NUMBER_OF_ENTRY_TYPES] =
     NOTIFY_ALT_BASE_ADDR
 };
 
-const char *entry_type_names[NUMBER_OF_ENTRY_TYPES] =
-{
-    "pico entries -- 1 B",
-    "nano entries -- 4 B",
-    "micro entries -- 16 B",
-    "tiny entries -- 64 B",
-    "small entries -- 256 B",
-    "medium entries -- 1 KB",
-    "large entries -- 4 KB",
-    "huge entries -- 16 KB",
-    "monster entries -- 64 KB",
-    "variable entries -- 1B - 10KB",
-    "notify entries -- 1B"
-};
-
 
-/* callback table declaration */
-
-const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
-{
-  {
+/* Callback classes */
+static const H5C_class_t pico_class[1] = {{
     PICO_ENTRY_TYPE,
     "pico_entry",
     H5FD_MEM_DEFAULT,
@@ -323,8 +305,9 @@ const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
     NULL,
     pico_free_icr,
     NULL,
-  },
-  {
+}};
+
+static const H5C_class_t nano_class[1] = {{
     NANO_ENTRY_TYPE,
     "nano_entry",
     H5FD_MEM_DEFAULT,
@@ -339,8 +322,9 @@ const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
     NULL,
     nano_free_icr,
     NULL,
-  },
-  {
+}};
+
+static const H5C_class_t micro_class[1] = {{
     MICRO_ENTRY_TYPE,
     "micro_entry",
     H5FD_MEM_DEFAULT,
@@ -355,8 +339,9 @@ const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
     NULL,
     micro_free_icr,
     NULL,
-  },
-  {
+}};
+
+static const H5C_class_t tiny_class[1] = {{
     TINY_ENTRY_TYPE,
     "tiny_entry",
     H5FD_MEM_DEFAULT,
@@ -371,8 +356,9 @@ const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
     NULL,
     tiny_free_icr,
     NULL,
-  },
-  {
+}};
+
+static const H5C_class_t small_class[1] = {{
     SMALL_ENTRY_TYPE,
     "small_entry",
     H5FD_MEM_DEFAULT,
@@ -387,8 +373,9 @@ const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
     NULL,
     small_free_icr,
     NULL,
-  },
-  {
+}};
+
+static const H5C_class_t medium_class[1] = {{
     MEDIUM_ENTRY_TYPE,
     "medium_entry",
     H5FD_MEM_DEFAULT,
@@ -403,8 +390,9 @@ const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
     NULL,
     medium_free_icr,
     NULL,
-  },
-  {
+}};
+
+static const H5C_class_t large_class[1] = {{
     LARGE_ENTRY_TYPE,
     "large_entry",
     H5FD_MEM_DEFAULT,
@@ -419,8 +407,9 @@ const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
     NULL,
     large_free_icr,
     NULL,
-  },
-  {
+}};
+
+static const H5C_class_t huge_class[1] = {{
     HUGE_ENTRY_TYPE,
     "huge_entry",
     H5FD_MEM_DEFAULT,
@@ -435,8 +424,9 @@ const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
     NULL,
     huge_free_icr,
     NULL,
-  },
-  {
+}};
+
+static const H5C_class_t monster_class[1] = {{
     MONSTER_ENTRY_TYPE,
     "monster_entry",
     H5FD_MEM_DEFAULT,
@@ -451,8 +441,9 @@ const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
     NULL,
     monster_free_icr,
     NULL,
-  },
-  {
+}};
+
+static const H5C_class_t variable_class[1] = {{
     VARIABLE_ENTRY_TYPE,
     "variable_entry",
     H5FD_MEM_DEFAULT,
@@ -467,8 +458,9 @@ const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
     NULL,
     variable_free_icr,
     NULL,
-  },
-  {
+}};
+
+static const H5C_class_t notify_class[1] = {{
     NOTIFY_ENTRY_TYPE,
     "notify_entry",
     H5FD_MEM_DEFAULT,
@@ -483,7 +475,22 @@ const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
     notify_notify,
     notify_free_icr,
     NULL,
-  }
+}};
+
+/* callback table declaration */
+
+const H5C_class_t *types[NUMBER_OF_ENTRY_TYPES] = {
+    pico_class,
+    nano_class,
+    micro_class,
+    tiny_class,
+    small_class,
+    medium_class,
+    large_class,
+    huge_class,
+    monster_class,
+    variable_class,
+    notify_class
 };
 
 /* address translation functions: */
@@ -3300,7 +3307,7 @@ setup_cache(size_t max_cache_size,
         cache_ptr = H5C_create(max_cache_size,
                                min_clean_size,
                                (NUMBER_OF_ENTRY_TYPES - 1),
-			       (const char **)entry_type_names,
+                               types,
                                check_write_permitted,
                                TRUE,
                                NULL,
@@ -3533,7 +3540,7 @@ expunge_entry(H5F_t * file_ptr,
 	HDassert( ! ( entry_ptr->is_pinned ) );
 
         result = H5C_expunge_entry(file_ptr, H5AC_ind_read_dxpl_id,
-                &(types[type]), entry_ptr->addr, H5C__NO_FLAGS_SET);
+                types[type], entry_ptr->addr, H5C__NO_FLAGS_SET);
 
         if ( result < 0 ) {
 
@@ -3754,11 +3761,11 @@ insert_entry(H5F_t * file_ptr,
         }
 
         result = H5C_insert_entry(file_ptr, xfer,
-	        &(types[type]), entry_ptr->addr, (void *)entry_ptr, flags);
+	        types[type], entry_ptr->addr, (void *)entry_ptr, flags);
 
         if ( ( result < 0 ) ||
              ( entry_ptr->header.is_protected ) ||
-             ( entry_ptr->header.type != &(types[type]) ) ||
+             ( entry_ptr->header.type != types[type] ) ||
              ( entry_ptr->size != entry_ptr->header.size ) ||
              ( entry_ptr->addr != entry_ptr->header.addr ) ) {
 
@@ -3771,8 +3778,8 @@ insert_entry(H5F_t * file_ptr,
             HDfprintf(stdout, "entry_ptr->header.is_protected = %d\n",
                       (int)(entry_ptr->header.is_protected));
             HDfprintf(stdout,
-		      "entry_ptr->header.type != &(types[type]) = %d\n",
-                      (int)(entry_ptr->header.type != &(types[type])));
+		      "entry_ptr->header.type != types[type] = %d\n",
+                      (int)(entry_ptr->header.type != types[type]));
             HDfprintf(stdout,
                       "entry_ptr->size != entry_ptr->header.size = %d\n",
                       (int)(entry_ptr->size != entry_ptr->header.size));
@@ -3855,7 +3862,7 @@ mark_entry_dirty(int32_t type,
              ( !entry_ptr->header.is_protected && !entry_ptr->header.is_pinned ) ||
              ( entry_ptr->header.is_protected && !entry_ptr->header.dirtied ) ||
              ( !entry_ptr->header.is_protected && !entry_ptr->header.is_dirty ) ||
-             ( entry_ptr->header.type != &(types[type]) ) ||
+             ( entry_ptr->header.type != types[type] ) ||
              ( entry_ptr->size != entry_ptr->header.size ) ||
              ( entry_ptr->addr != entry_ptr->header.addr ) ) {
 
@@ -3948,7 +3955,7 @@ move_entry(H5C_t * cache_ptr,
                 mark_flush_dep_dirty(entry_ptr);
 
             entry_ptr->action = TEST_ENTRY_ACTION_MOVE;
-            result = H5C_move_entry(cache_ptr, &(types[type]), old_addr, new_addr);
+            result = H5C_move_entry(cache_ptr, types[type], old_addr, new_addr);
             entry_ptr->action = TEST_ENTRY_ACTION_NUL;
         }
 
@@ -4027,12 +4034,12 @@ protect_entry(H5F_t * file_ptr, int32_t type, int32_t idx)
         } /* end if */
 
         cache_entry_ptr = (H5C_cache_entry_t *)H5C_protect(file_ptr, xfer,
-                &(types[type]), entry_ptr->addr, &entry_ptr->addr, 
+                types[type], entry_ptr->addr, &entry_ptr->addr, 
                 H5C__NO_FLAGS_SET);
 
         if ( ( cache_entry_ptr != (void *)entry_ptr ) ||
              ( !(entry_ptr->header.is_protected) ) ||
-             ( entry_ptr->header.type != &(types[type]) ) ||
+             ( entry_ptr->header.type != types[type] ) ||
              ( entry_ptr->size != entry_ptr->header.size ) ||
              ( entry_ptr->addr != entry_ptr->header.addr ) ) {
 
@@ -4049,8 +4056,8 @@ protect_entry(H5F_t * file_ptr, int32_t type, int32_t idx)
             HDfprintf(stdout, "entry_ptr->header.is_protected = %d\n",
                       (int)(entry_ptr->header.is_protected));
             HDfprintf(stdout,
-                      "( entry_ptr->header.type != &(types[type]) ) = %d\n",
-                      (int)( entry_ptr->header.type != &(types[type]) ));
+                      "( entry_ptr->header.type != types[type] ) = %d\n",
+                      (int)( entry_ptr->header.type != types[type] ));
             HDfprintf(stdout,
                       "entry_ptr->size = %d, entry_ptr->header.size = %d\n",
                       (int)(entry_ptr->size), (int)(entry_ptr->header.size));
@@ -4131,13 +4138,13 @@ protect_entry_ro(H5F_t * file_ptr,
 		    ( entry_ptr->ro_ref_count > 0 ) ) );
 
         cache_entry_ptr = (H5C_cache_entry_t *)H5C_protect(file_ptr, H5AC_ind_read_dxpl_id,
-                &(types[type]), entry_ptr->addr, &entry_ptr->addr, H5C__READ_ONLY_FLAG);
+                types[type], entry_ptr->addr, &entry_ptr->addr, H5C__READ_ONLY_FLAG);
 
         if ( ( cache_entry_ptr != (void *)entry_ptr ) ||
              ( !(entry_ptr->header.is_protected) ) ||
              ( !(entry_ptr->header.is_read_only) ) ||
              ( entry_ptr->header.ro_ref_count <= 0 ) ||
-             ( entry_ptr->header.type != &(types[type]) ) ||
+             ( entry_ptr->header.type != types[type] ) ||
              ( entry_ptr->size != entry_ptr->header.size ) ||
              ( entry_ptr->addr != entry_ptr->header.addr ) ) {
 
@@ -4268,7 +4275,7 @@ unpin_entry(int32_t type,
         if ( ( result < 0 ) ||
              ( entry_ptr->header.pinned_from_client ) ||
              ( entry_ptr->header.is_pinned && !entry_ptr->header.pinned_from_cache ) ||
-             ( entry_ptr->header.type != &(types[type]) ) ||
+             ( entry_ptr->header.type != types[type] ) ||
              ( entry_ptr->size != entry_ptr->header.size ) ||
              ( entry_ptr->addr != entry_ptr->header.addr ) ) {
 
@@ -4353,7 +4360,7 @@ unprotect_entry(H5F_t * file_ptr,
              ( ( entry_ptr->header.is_protected ) &&
 	       ( ( ! ( entry_ptr->is_read_only ) ) ||
 		 ( entry_ptr->ro_ref_count <= 0 ) ) ) ||
-             ( entry_ptr->header.type != &(types[type]) ) ||
+             ( entry_ptr->header.type != types[type] ) ||
              ( entry_ptr->size != entry_ptr->header.size ) ||
              ( entry_ptr->addr != entry_ptr->header.addr ) ) {
 
diff --git a/test/cache_common.h b/test/cache_common.h
index befcee4..f003189 100644
--- a/test/cache_common.h
+++ b/test/cache_common.h
@@ -553,11 +553,10 @@ H5TEST_DLLVAR const int32_t max_indices[NUMBER_OF_ENTRY_TYPES];
 H5TEST_DLLVAR const size_t entry_sizes[NUMBER_OF_ENTRY_TYPES];
 H5TEST_DLLVAR const haddr_t base_addrs[NUMBER_OF_ENTRY_TYPES];
 H5TEST_DLLVAR const haddr_t alt_base_addrs[NUMBER_OF_ENTRY_TYPES];
-H5TEST_DLLVAR const char * entry_type_names[NUMBER_OF_ENTRY_TYPES];
 
 /* callback table extern */
 
-H5TEST_DLLVAR const H5C_class_t types[NUMBER_OF_ENTRY_TYPES];
+H5TEST_DLLVAR const H5C_class_t *types[NUMBER_OF_ENTRY_TYPES];
 
 
 #ifdef __cplusplus
diff --git a/testpar/t_cache.c b/testpar/t_cache.c
index 8753325..039b3ab 100644
--- a/testpar/t_cache.c
+++ b/testpar/t_cache.c
@@ -410,7 +410,8 @@ static herr_t datum_notify(H5C_notify_action_t action, void *thing);
 
 static herr_t datum_free_icr(void * thing);
 
-#define DATUM_ENTRY_TYPE	H5AC_TEST_ID
+/* Masquerade as object header entries to the cache */
+#define DATUM_ENTRY_TYPE	H5AC_OHDR_ID
 
 #define NUMBER_OF_ENTRY_TYPES	1
 
@@ -434,7 +435,7 @@ const H5C_class_t types[NUMBER_OF_ENTRY_TYPES] =
   {
     /* id            */ DATUM_ENTRY_TYPE,
     /* name          */ "datum",
-    /* mem_type      */ H5FD_MEM_DEFAULT,
+    /* mem_type      */ H5FD_MEM_OHDR,
     /* flags         */ H5AC__CLASS_SKIP_READS | H5AC__CLASS_SKIP_WRITES,
     /* get_initial_load_size */ datum_get_initial_load_size,
     /* get_final_load_size */ NULL,