[svn-r6383] Purpose:

    New feature for developers.

Description:
    Added "function stack" tracing to library.  This allows developers (there
    is no public API) to call H5FS_print within the library and get a listing
    of the functions traversed to reach that point in the library.  Eventually,
    I may add support for reporting the parameters to each function also...

    Mainly for debugging parallel I/O programs, but I think it will come in
    handy in other cases also.

    The function stack tracking is controlled with a configure switch:
    --enable-funcstack, which defaults to enabled currently.  When we branch
    for 1.6, we should change the default setting on the branch to be disabled.

    Also, added a destructor to the thread-specific keys when thread-safety is
    turned on in the library.  Otherwise, they were leaking memory and causing
    difficult to debug errors in threaded programs (like the test/ttsafe test).

Platforms tested:
    Tested h5committest {arabica (fortran), eirene (fortran, C++)
	modi4 (parallel, fortran)}

    FreeBSD 4.7 (sleipnir) w/thread-safety enabled.

Misc. update:
    Updated MANIFEST with new files added (src/H5FS.c & src/H5FDprivate.h)

    Update release_docs/RELEASE with thread-safety bug fix.

1 files changed, 40 insertions, 0 deletions

diff --git a/src/H5CSprivate.h b/src/H5CSprivate.h
new file mode 100644
index 0000000..6dba575
--- /dev/null
+++ b/src/H5CSprivate.h
@@ -0,0 +1,40 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * 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. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ *  Header file for function stacks, etc.
+ */
+#ifndef _H5FSprivate_H
+#define _H5FSprivate_H
+
+#ifdef NOT_YET
+#include "H5FSpublic.h"
+#endif /* NOT_YET */
+
+/* Private headers needed by this file */
+#include "H5private.h"
+
+#define H5FS_NSLOTS	32	/*number of slots in an function stack	     */
+
+/* A function stack */
+typedef struct H5FS_t {
+    int	nused;			        /*num slots currently used in stack  */
+    const char *slot[H5FS_NSLOTS];	/*array of function records	     */
+} H5FS_t;
+
+H5_DLL herr_t H5FS_push (const char *func_name);
+H5_DLL herr_t H5FS_pop (void);
+H5_DLL herr_t H5FS_print (FILE *stream);
+
+#endif /* _H5FSprivate_H */