[svn-r19247] Description:

	Bring r19246 from Coverity branch to trunk:

    Improve metadata "accumulator" for files to track the dirty region within
the accumulator data.  This allows the accumulator to drop clean data and
reduces the number of I/O operations when it is dirtied.

    This is progress toward Bz#1142 - speeding up the fheap test (which it
doesn't help much, actually, but it does help other aspects of file I/O).

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 (amani) 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, w/threadsafe, in production mode
        Linux/PPC 2.6 (heiwa) w/C++ & FORTRAN, w/threadsafe, in debug mode
        Linux/64-ia64 2.6 (cobalt) w/Intel compilers, w/C++ & FORTRAN,
                in production mode
        Linux/64-amd64 2.6 (abe) w/parallel, w/FORTRAN, in debug mode
        Mac OS X/32 10.6.4 (amazon) in debug mode
        Mac OS X/32 10.6.4 (amazon) w/C++ & FORTRAN, w/threadsafe,
                in production mode
        Mac OS X/32 10.6.4 (amazon) w/parallel, in debug mode

1 files changed, 2 insertions, 0 deletions

diff --git a/src/H5Fpkg.h b/src/H5Fpkg.h
index 0f5616f..d264d04 100644
--- a/src/H5Fpkg.h
+++ b/src/H5Fpkg.h
@@ -142,6 +142,8 @@ typedef struct H5F_meta_accum_t {
     haddr_t             loc;            /* File location (offset) of the accumulated metadata */
     size_t              size;           /* Size of the accumulated metadata buffer used (in bytes) */
     size_t              alloc_size;     /* Size of the accumulated metadata buffer allocated (in bytes) */
+    size_t              dirty_off;      /* Offset of the dirty region in the accumulator buffer */
+    size_t              dirty_len;      /* Length of the dirty region in the accumulator buffer */
     hbool_t             dirty;          /* Flag to indicate that the accumulated metadata is dirty */
 } H5F_meta_accum_t;