[svn-r10184] Purpose:

    New feature

Description:
    Add new "block tracker" data structure to library, for tracking blocks of
bytes in a file.  Block trackers will be used to keep track of the blocks
belonging to the soon-to-be-implemented "segmented heap" which is designed to
replace the current local & global heaps (starting with the local heap).
Block trackers will also keep track of the free space in the segmented heap
and someday could be used to track the free space in the entire HDF5 file.
    They are implemented as a small header of information to cache the state
of the blocks (max & min sizes of blocks tracked, etc.) and the records of
the blocks themselves are stored in a v2 B-tree.

Platforms tested:
    FreeBSD 4.11 (sleipnir)
    Solaris 2.9 (shanti)
    h5committest

1 files changed, 104 insertions, 0 deletions

diff --git a/src/H5BTdbg.c b/src/H5BTdbg.c
new file mode 100644
index 0000000..a926801
--- /dev/null
+++ b/src/H5BTdbg.c
@@ -0,0 +1,104 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have     *
+ * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created:		H5BTdbg.c
+ *			Mar 10 2005
+ *			Quincey Koziol <koziol@ncsa.uiuc.edu>
+ *
+ * Purpose:		Dump debugging information about a block tracker
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#define H5BT_PACKAGE		/*suppress error about including H5BTpkg  */
+
+/* Private headers */
+#include "H5private.h"		/* Generic Functions			*/
+#include "H5BTpkg.h"		/* B-trees				*/
+#include "H5Eprivate.h"		/* Error handling		  	*/
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5BT_debug
+ *
+ * Purpose:	Prints debugging info about a block tracker info
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Mar 10 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5BT_hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int fwidth)
+{
+    H5BT_t	*bt = NULL;
+    herr_t      ret_value=SUCCEED;       /* Return value */
+
+    FUNC_ENTER_NOAPI(H5BT_hdr_debug, FAIL)
+
+    /*
+     * Check arguments.
+     */
+    assert(f);
+    assert(H5F_addr_defined(addr));
+    assert(stream);
+    assert(indent >= 0);
+    assert(fwidth >= 0);
+
+    /*
+     * Load the block tracker info
+     */
+    if (NULL == (bt = H5AC_protect(f, dxpl_id, H5AC_BLTR, addr, NULL, NULL, H5AC_READ)))
+	HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load block tracker info")
+
+    /*
+     * Print the values.
+     */
+    HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
+	      "Dirty flag:",
+	      bt->cache_info.is_dirty ? "True" : "False");
+    HDfprintf(stream, "%*s%-*s %x\n", indent, "", fwidth,
+	      "Status:",
+	      (unsigned)bt->status);
+    HDfprintf(stream, "%*s%-*s %Hu\n", indent, "", fwidth,
+	      "Max. Size of Block Tracked:",
+	      bt->max_block_size);
+    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
+	      "Ref. Count of Max. Block Tracked:",
+	      (unsigned)bt->max_block_cnt);
+    HDfprintf(stream, "%*s%-*s %Hu\n", indent, "", fwidth,
+	      "Min. Size of Block Tracked:",
+	      bt->min_block_size);
+    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
+	      "Ref. Count of Min. Block Tracked:",
+	      (unsigned)bt->min_block_cnt);
+    HDfprintf(stream, "%*s%-*s %Hu\n", indent, "", fwidth,
+	      "Total Size of All Blocks Tracked:",
+	      bt->tot_block_size);
+    HDfprintf(stream, "%*s%-*s %a\n", indent, "", fwidth,
+	      "Address of v2 B-tree Storing Block Info Records:",
+	      bt->bt2_addr);
+
+done:
+    if (bt && H5AC_unprotect(f, dxpl_id, H5AC_BLTR, addr, bt, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release block tracker info")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5BT_debug() */
+