[svn-r17649] Description:

	Refactor v2 B-trees to pin the B-tree header in the cache instead of
using separate reference counted data structure.

Tested on:
        FreeBSD/32 6.3 (duty) in debug mode
        FreeBSD/64 6.3 (liberty) w/C++ & FORTRAN, in debug mode
        Linux/32 2.6 (jam) w/PGI compilers, w/default API=1.8.x,
                w/C++ & FORTRAN, w/threadsafe, in debug mode
        Linux/64-amd64 2.6 (smirom) w/Intel compilers, w/default API=1.6.x,
                w/C++ & FORTRAN, in production mode
        Solaris/32 2.10 (linew) w/deprecated symbols disabled, w/C++ & FORTRAN,
                w/szip filter, in production mode
        Linux/64-ia64 2.6 (cobalt) w/Intel compilers, w/C++ & FORTRAN,
                in production mode
        Linux/64-ia64 2.4 (tg-login3) w/parallel, w/FORTRAN, in debug mode
        Linux/64-amd64 2.6 (abe) w/parallel, w/FORTRAN, in production mode
        Mac OS X/32 10.6.1 (amazon) in debug mode
        Mac OS X/32 10.6.1 (amazon) w/C++ & FORTRAN, w/threadsafe,
                in production mode

1 files changed, 79 insertions, 82 deletions

diff --git a/src/H5B2dbg.c b/src/H5B2dbg.c
index 836486e..573fee8 100644
--- a/src/H5B2dbg.c
+++ b/src/H5B2dbg.c
@@ -91,9 +91,8 @@ H5B2_hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     const H5B2_class_t *type)
 {
     H5B2_t	*bt2 = NULL;            /* B-tree header info */
-    H5B2_shared_t *shared;              /* Shared B-tree information */
     unsigned    u;                      /* Local index variable */
-    char                temp_str[128];  /* Temporary string, for formatting */
+    char        temp_str[128];          /* Temporary string, for formatting */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_NOAPI(H5B2_hdr_debug, FAIL)
@@ -114,9 +113,8 @@ H5B2_hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     if(NULL == (bt2 = (H5B2_t *)H5AC_protect(f, dxpl_id, H5AC_BT2_HDR, addr, type, NULL, H5AC_READ)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree header")
 
-    /* Get the pointer to the shared B-tree info */
-    shared = (H5B2_shared_t *)H5RC_GET_OBJ(bt2->shared);
-    HDassert(shared);
+    /* Set file pointer for this B-tree operation */
+    bt2->f = f;
 
     /* Print opening message */
     HDfprintf(stream, "%*sv2 B-tree Header...\n", indent, "");
@@ -126,29 +124,29 @@ H5B2_hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
      */
     HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
 	      "Tree type ID:",
-	      (shared->type->id == H5B2_TEST_ID ? "H5B2_TEST_ID" :
-                  (shared->type->id == H5B2_FHEAP_HUGE_INDIR_ID ? "H5B2_FHEAP_HUGE_INDIR_ID" :
-                  (shared->type->id == H5B2_FHEAP_HUGE_FILT_INDIR_ID ? "H5B2_FHEAP_HUGE_FILT_INDIR_ID" :
-                  (shared->type->id == H5B2_FHEAP_HUGE_DIR_ID ? "H5B2_FHEAP_HUGE_DIR_ID" :
-                  (shared->type->id == H5B2_FHEAP_HUGE_FILT_DIR_ID ? "H5B2_FHEAP_HUGE_FILT_DIR_ID" :
-                  (shared->type->id == H5B2_GRP_DENSE_NAME_ID ? "H5B2_GRP_DENSE_NAME_ID" :
-                  (shared->type->id == H5B2_GRP_DENSE_CORDER_ID ? "H5B2_GRP_DENSE_CORDER_ID" :
-                  (shared->type->id == H5B2_SOHM_INDEX_ID ? "H5B2_SOHM_INDEX_ID" :
-                  (shared->type->id == H5B2_ATTR_DENSE_NAME_ID ? "H5B2_ATTR_DENSE_NAME_ID" :
-                  (shared->type->id == H5B2_ATTR_DENSE_CORDER_ID ? "H5B2_ATTR_DENSE_CORDER_ID" :
+	      (bt2->type->id == H5B2_TEST_ID ? "H5B2_TEST_ID" :
+                  (bt2->type->id == H5B2_FHEAP_HUGE_INDIR_ID ? "H5B2_FHEAP_HUGE_INDIR_ID" :
+                  (bt2->type->id == H5B2_FHEAP_HUGE_FILT_INDIR_ID ? "H5B2_FHEAP_HUGE_FILT_INDIR_ID" :
+                  (bt2->type->id == H5B2_FHEAP_HUGE_DIR_ID ? "H5B2_FHEAP_HUGE_DIR_ID" :
+                  (bt2->type->id == H5B2_FHEAP_HUGE_FILT_DIR_ID ? "H5B2_FHEAP_HUGE_FILT_DIR_ID" :
+                  (bt2->type->id == H5B2_GRP_DENSE_NAME_ID ? "H5B2_GRP_DENSE_NAME_ID" :
+                  (bt2->type->id == H5B2_GRP_DENSE_CORDER_ID ? "H5B2_GRP_DENSE_CORDER_ID" :
+                  (bt2->type->id == H5B2_SOHM_INDEX_ID ? "H5B2_SOHM_INDEX_ID" :
+                  (bt2->type->id == H5B2_ATTR_DENSE_NAME_ID ? "H5B2_ATTR_DENSE_NAME_ID" :
+                  (bt2->type->id == H5B2_ATTR_DENSE_CORDER_ID ? "H5B2_ATTR_DENSE_CORDER_ID" :
               "Unknown!")))))))))));
     HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
 	      "Size of node:",
-	      shared->node_size);
+	      bt2->node_size);
     HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
 	      "Size of raw (disk) record:",
-	      shared->rrec_size);
+	      bt2->rrec_size);
     HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
 	      "Dirty flag:",
 	      bt2->cache_info.is_dirty ? "True" : "False");
     HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
 	      "Depth:",
-	      shared->depth);
+	      bt2->depth);
     HDfprintf(stream, "%*s%-*s %Hu\n", indent, "", fwidth,
 	      "Number of records in tree:",
 	      bt2->root.all_nrec);
@@ -160,23 +158,26 @@ H5B2_hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
 	      bt2->root.addr);
     HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
 	      "Split percent:",
-	      shared->split_percent);
+	      bt2->split_percent);
     HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
 	      "Merge percent:",
-	      shared->merge_percent);
+	      bt2->merge_percent);
 
     /* Print relevant node info */
     HDfprintf(stream, "%*sNode Info: (max_nrec/split_nrec/merge_nrec)\n", indent, "");
-    for(u = 0; u < (shared->depth + 1); u++) {
+    for(u = 0; u < (bt2->depth + 1); u++) {
         sprintf(temp_str, "Depth %u:", u);
         HDfprintf(stream, "%*s%-*s (%u/%u/%u)\n", indent + 3, "", MAX(0, fwidth - 3),
             temp_str,
-            shared->node_info[u].max_nrec, shared->node_info[u].split_nrec, shared->node_info[u].merge_nrec);
+            bt2->node_info[u].max_nrec, bt2->node_info[u].split_nrec, bt2->node_info[u].merge_nrec);
     } /* end for */
 
 done:
-    if(bt2 && H5AC_unprotect(f, dxpl_id, H5AC_BT2_HDR, addr, bt2, H5AC__NO_FLAGS_SET) < 0)
-        HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree header")
+    if(bt2) {
+        bt2->f = NULL;
+        if(H5AC_unprotect(f, dxpl_id, H5AC_BT2_HDR, addr, bt2, H5AC__NO_FLAGS_SET) < 0)
+            HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree header")
+    } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5B2_hdr_debug() */
@@ -199,11 +200,10 @@ herr_t
 H5B2_int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int fwidth,
     const H5B2_class_t *type, haddr_t hdr_addr, unsigned nrec, unsigned depth)
 {
-    H5B2_t	*bt2 = NULL;
-    H5B2_internal_t	*internal = NULL;
-    H5B2_shared_t 	*shared;        /* Shared B-tree information */
-    unsigned		u;              /* Local index variable */
-    char                temp_str[128];  /* Temporary string, for formatting */
+    H5B2_t	*bt2 = NULL;            /* B-tree header */
+    H5B2_internal_t	*internal = NULL;   /* B-tree internal node */
+    unsigned	u;                      /* Local index variable */
+    char        temp_str[128];          /* Temporary string, for formatting */
     herr_t      ret_value=SUCCEED;      /* Return value */
 
     FUNC_ENTER_NOAPI(H5B2_int_debug, FAIL)
@@ -226,21 +226,15 @@ H5B2_int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     if(NULL == (bt2 = (H5B2_t *)H5AC_protect(f, dxpl_id, H5AC_BT2_HDR, hdr_addr, type, NULL, H5AC_READ)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree header")
 
-    /* Get the pointer to the shared B-tree info */
-    shared = (H5B2_shared_t *)H5RC_GET_OBJ(bt2->shared);
-    HDassert(shared);
+    /* Set file pointer for this B-tree operation */
+    bt2->f = f;
 
     /*
      * Load the B-tree internal node
      */
-    if(NULL == (internal = H5B2_protect_internal(f, dxpl_id, bt2->shared, addr, nrec, depth, H5AC_READ)))
+    if(NULL == (internal = H5B2_protect_internal(f, dxpl_id, bt2, addr, nrec, depth, H5AC_READ)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree internal node")
 
-    /* Release the B-tree header */
-    if(H5AC_unprotect(f, dxpl_id, H5AC_BT2_HDR, hdr_addr, bt2, H5AC__NO_FLAGS_SET) < 0)
-        HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree header")
-    bt2 = NULL;
-
     /* Print opening message */
     if(internal->depth == 1)
         HDfprintf(stream, "%*sv2 B-tree Internal 'Leaf' Node...\n", indent, "");
@@ -252,23 +246,23 @@ H5B2_int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
      */
     HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
 	      "Tree type ID:",
-	      (shared->type->id == H5B2_TEST_ID ? "H5B2_TEST_ID" :
-                  (shared->type->id == H5B2_FHEAP_HUGE_INDIR_ID ? "H5B2_FHEAP_HUGE_INDIR_ID" :
-                  (shared->type->id == H5B2_FHEAP_HUGE_FILT_INDIR_ID ? "H5B2_FHEAP_HUGE_FILT_INDIR_ID" :
-                  (shared->type->id == H5B2_FHEAP_HUGE_DIR_ID ? "H5B2_FHEAP_HUGE_DIR_ID" :
-                  (shared->type->id == H5B2_FHEAP_HUGE_FILT_DIR_ID ? "H5B2_FHEAP_HUGE_FILT_DIR_ID" :
-                  (shared->type->id == H5B2_GRP_DENSE_NAME_ID ? "H5B2_GRP_DENSE_NAME_ID" :
-                  (shared->type->id == H5B2_GRP_DENSE_CORDER_ID ? "H5B2_GRP_DENSE_CORDER_ID" :
-                  (shared->type->id == H5B2_SOHM_INDEX_ID ? "H5B2_SOHM_INDEX_ID" :
-                  (shared->type->id == H5B2_ATTR_DENSE_NAME_ID ? "H5B2_ATTR_DENSE_NAME_ID" :
-                  (shared->type->id == H5B2_ATTR_DENSE_CORDER_ID ? "H5B2_ATTR_DENSE_CORDER_ID" :
+	      (bt2->type->id == H5B2_TEST_ID ? "H5B2_TEST_ID" :
+                  (bt2->type->id == H5B2_FHEAP_HUGE_INDIR_ID ? "H5B2_FHEAP_HUGE_INDIR_ID" :
+                  (bt2->type->id == H5B2_FHEAP_HUGE_FILT_INDIR_ID ? "H5B2_FHEAP_HUGE_FILT_INDIR_ID" :
+                  (bt2->type->id == H5B2_FHEAP_HUGE_DIR_ID ? "H5B2_FHEAP_HUGE_DIR_ID" :
+                  (bt2->type->id == H5B2_FHEAP_HUGE_FILT_DIR_ID ? "H5B2_FHEAP_HUGE_FILT_DIR_ID" :
+                  (bt2->type->id == H5B2_GRP_DENSE_NAME_ID ? "H5B2_GRP_DENSE_NAME_ID" :
+                  (bt2->type->id == H5B2_GRP_DENSE_CORDER_ID ? "H5B2_GRP_DENSE_CORDER_ID" :
+                  (bt2->type->id == H5B2_SOHM_INDEX_ID ? "H5B2_SOHM_INDEX_ID" :
+                  (bt2->type->id == H5B2_ATTR_DENSE_NAME_ID ? "H5B2_ATTR_DENSE_NAME_ID" :
+                  (bt2->type->id == H5B2_ATTR_DENSE_CORDER_ID ? "H5B2_ATTR_DENSE_CORDER_ID" :
               "Unknown!")))))))))));
     HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
 	      "Size of node:",
-	      shared->node_size);
+	      bt2->node_size);
     HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
 	      "Size of raw (disk) record:",
-	      shared->rrec_size);
+	      bt2->rrec_size);
     HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
 	      "Dirty flag:",
 	      internal->cache_info.is_dirty ? "True" : "False");
@@ -290,9 +284,9 @@ H5B2_int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
         sprintf(temp_str, "Record #%u:", u);
         HDfprintf(stream, "%*s%-*s\n", indent + 3, "", MAX(0, fwidth - 3),
                   temp_str);
-        HDassert(H5B2_INT_NREC(internal, shared, u));
+        HDassert(H5B2_INT_NREC(internal, bt2, u));
         (void)(type->debug)(stream, f, dxpl_id, indent + 6, MAX (0, fwidth-6),
-            H5B2_INT_NREC(internal,shared,u), NULL);
+            H5B2_INT_NREC(internal, bt2, u), NULL);
     } /* end for */
 
     /* Print final node pointer */
@@ -304,6 +298,11 @@ H5B2_int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
               internal->node_ptrs[u].addr);
 
 done:
+    if(bt2) {
+        bt2->f = NULL;
+        if(H5AC_unprotect(f, dxpl_id, H5AC_BT2_HDR, hdr_addr, bt2, H5AC__NO_FLAGS_SET) < 0)
+            HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree header")
+    } /* end if */
     if(internal && H5AC_unprotect(f, dxpl_id, H5AC_BT2_INT, addr, internal, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree internal node")
 
@@ -328,12 +327,11 @@ herr_t
 H5B2_leaf_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int fwidth,
     const H5B2_class_t *type, haddr_t hdr_addr, unsigned nrec)
 {
-    H5B2_t	*bt2 = NULL;
-    H5B2_leaf_t	*leaf = NULL;
-    H5B2_shared_t 	*shared;        /* Shared B-tree information */
-    unsigned		u;              /* Local index variable */
-    char                temp_str[128];  /* Temporary string, for formatting */
-    herr_t      ret_value=SUCCEED;      /* Return value */
+    H5B2_t	*bt2 = NULL;            /* B-tree header */
+    H5B2_leaf_t	*leaf = NULL;           /* B-tree leaf node */
+    unsigned	u;                      /* Local index variable */
+    char        temp_str[128];          /* Temporary string, for formatting */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_NOAPI(H5B2_leaf_debug, FAIL)
 
@@ -355,21 +353,15 @@ H5B2_leaf_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     if(NULL == (bt2 = (H5B2_t *)H5AC_protect(f, dxpl_id, H5AC_BT2_HDR, hdr_addr, type, NULL, H5AC_READ)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree header")
 
-    /* Get the pointer to the shared B-tree info */
-    shared = (H5B2_shared_t *)H5RC_GET_OBJ(bt2->shared);
-    HDassert(shared);
+    /* Set file pointer for this B-tree operation */
+    bt2->f = f;
 
     /*
      * Load the B-tree leaf node
      */
-    if(NULL == (leaf = (H5B2_leaf_t *)H5AC_protect(f, dxpl_id, H5AC_BT2_LEAF, addr, &nrec, bt2->shared, H5AC_READ)))
+    if(NULL == (leaf = (H5B2_leaf_t *)H5AC_protect(f, dxpl_id, H5AC_BT2_LEAF, addr, &nrec, bt2, H5AC_READ)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree leaf node")
 
-    /* Release the B-tree header */
-    if(H5AC_unprotect(f, dxpl_id, H5AC_BT2_HDR, hdr_addr, bt2, H5AC__NO_FLAGS_SET) < 0)
-        HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree header")
-    bt2 = NULL;
-
     /* Print opening message */
     HDfprintf(stream, "%*sv2 B-tree Leaf Node...\n", indent, "");
 
@@ -378,23 +370,23 @@ H5B2_leaf_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
      */
     HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
 	      "Tree type ID:",
-	      (shared->type->id == H5B2_TEST_ID ? "H5B2_TEST_ID" :
-                  (shared->type->id == H5B2_FHEAP_HUGE_INDIR_ID ? "H5B2_FHEAP_HUGE_INDIR_ID" :
-                  (shared->type->id == H5B2_FHEAP_HUGE_FILT_INDIR_ID ? "H5B2_FHEAP_HUGE_FILT_INDIR_ID" :
-                  (shared->type->id == H5B2_FHEAP_HUGE_DIR_ID ? "H5B2_FHEAP_HUGE_DIR_ID" :
-                  (shared->type->id == H5B2_FHEAP_HUGE_FILT_DIR_ID ? "H5B2_FHEAP_HUGE_FILT_DIR_ID" :
-                  (shared->type->id == H5B2_GRP_DENSE_NAME_ID ? "H5B2_GRP_DENSE_NAME_ID" :
-                  (shared->type->id == H5B2_GRP_DENSE_CORDER_ID ? "H5B2_GRP_DENSE_CORDER_ID" :
-                  (shared->type->id == H5B2_SOHM_INDEX_ID ? "H5B2_SOHM_INDEX_ID" :
-                  (shared->type->id == H5B2_ATTR_DENSE_NAME_ID ? "H5B2_ATTR_DENSE_NAME_ID" :
-                  (shared->type->id == H5B2_ATTR_DENSE_CORDER_ID ? "H5B2_ATTR_DENSE_CORDER_ID" :
+	      (bt2->type->id == H5B2_TEST_ID ? "H5B2_TEST_ID" :
+                  (bt2->type->id == H5B2_FHEAP_HUGE_INDIR_ID ? "H5B2_FHEAP_HUGE_INDIR_ID" :
+                  (bt2->type->id == H5B2_FHEAP_HUGE_FILT_INDIR_ID ? "H5B2_FHEAP_HUGE_FILT_INDIR_ID" :
+                  (bt2->type->id == H5B2_FHEAP_HUGE_DIR_ID ? "H5B2_FHEAP_HUGE_DIR_ID" :
+                  (bt2->type->id == H5B2_FHEAP_HUGE_FILT_DIR_ID ? "H5B2_FHEAP_HUGE_FILT_DIR_ID" :
+                  (bt2->type->id == H5B2_GRP_DENSE_NAME_ID ? "H5B2_GRP_DENSE_NAME_ID" :
+                  (bt2->type->id == H5B2_GRP_DENSE_CORDER_ID ? "H5B2_GRP_DENSE_CORDER_ID" :
+                  (bt2->type->id == H5B2_SOHM_INDEX_ID ? "H5B2_SOHM_INDEX_ID" :
+                  (bt2->type->id == H5B2_ATTR_DENSE_NAME_ID ? "H5B2_ATTR_DENSE_NAME_ID" :
+                  (bt2->type->id == H5B2_ATTR_DENSE_CORDER_ID ? "H5B2_ATTR_DENSE_CORDER_ID" :
               "Unknown!")))))))))));
     HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
 	      "Size of node:",
-	      shared->node_size);
+	      bt2->node_size);
     HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
 	      "Size of raw (disk) record:",
-	      shared->rrec_size);
+	      bt2->rrec_size);
     HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
 	      "Dirty flag:",
 	      leaf->cache_info.is_dirty ? "True" : "False");
@@ -408,12 +400,17 @@ H5B2_leaf_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
         sprintf(temp_str, "Record #%u:", u);
         HDfprintf(stream, "%*s%-*s\n", indent + 3, "", MAX(0, fwidth - 3),
                   temp_str);
-        HDassert(H5B2_LEAF_NREC(leaf, shared, u));
-        (void)(type->debug)(stream, f, dxpl_id, indent+6, MAX (0, fwidth-6),
-            H5B2_LEAF_NREC(leaf,shared,u), NULL);
+        HDassert(H5B2_LEAF_NREC(leaf, bt2, u));
+        (void)(type->debug)(stream, f, dxpl_id, indent + 6, MAX (0, fwidth-6),
+            H5B2_LEAF_NREC(leaf, bt2, u), NULL);
     } /* end for */
 
 done:
+    if(bt2) {
+        bt2->f = NULL;
+        if(H5AC_unprotect(f, dxpl_id, H5AC_BT2_HDR, hdr_addr, bt2, H5AC__NO_FLAGS_SET) < 0)
+            HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree header")
+    } /* end if */
     if(leaf && H5AC_unprotect(f, dxpl_id, H5AC_BT2_LEAF, addr, leaf, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree leaf node")