[svn-r14064] Implemented function allowing the user to cork the metadata cache.

Also implemented associated test code.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/H5Cpkg.h b/src/H5Cpkg.h
index 3b8d650..949f923 100644
--- a/src/H5Cpkg.h
+++ b/src/H5Cpkg.h
@@ -176,6 +176,18 @@
  *		entry is flushed to disk.
  *
  *
+ * In cases where memory is plentiful, and performance is an issue, it
+ * is useful to disable all cache evictions, and thereby postpone metadata
+ * writes.  The following field is used to implement this.
+ *
+ * evictions_enabled:  Boolean flag that is initialized to TRUE.  When
+ * 		this flag is set to FALSE, the metadata cache will not 
+ * 		attempt to evict entries to make space for newly protected
+ * 		entries, and instead the will grow without limit.
+ * 		
+ * 		Needless to say, this feature must be used with care.
+ *
+ *
  * The cache requires an index to facilitate searching for entries.  The
  * following fields support that index.
  *
@@ -802,6 +814,8 @@ struct H5C_t
 
     H5C_log_flush_func_t	log_flush;
 
+    hbool_t			evictions_enabled;
+
     int32_t                     index_len;
     size_t                      index_size;
     H5C_cache_entry_t *		(index[H5C__HASH_TABLE_LEN]);