[svn-r8877]

Purpose:
Bug Fix

Description:
If an HDF5 file grows larger than its address space, it dies and is unable to
write any data.  This is more likely to happen since users are able to change
the number of bytes used to store addresses in the file.

Solution:
HDF5 now throws an error instead of dying.  In addition, it "reserves" address
space for the local heap and for object headers (which do not allocate space
immediately).  This ensures that after the error occurs, there is enough address
space left to flush the entire file to disk, so no data is lost.
A more complete explanation is at /doc/html/TechNotes/ReservedFileSpace.html

Platforms tested:
sleipnir, copper (parallel), verbena, arabica, Windows (Visual Studio 7)


Solution:

Platforms tested:

Misc. update:

1 files changed, 1 insertions, 0 deletions

diff --git a/src/H5FDpublic.h b/src/H5FDpublic.h
index 3454f28..596e0f1 100644
--- a/src/H5FDpublic.h
+++ b/src/H5FDpublic.h
@@ -187,6 +187,7 @@ struct H5FD_t {
     unsigned long       feature_flags;  /* VFL Driver feature Flags */
     hsize_t             threshold;      /* Threshold for alignment  */
     hsize_t             alignment;      /* Allocation alignment     */
+    hsize_t             reserved_alloc; /* Space reserved for later alloc calls */
 
     /* Metadata aggregation fields */
     hsize_t             def_meta_block_size;  /* Metadata allocation