[svn-r20658] Description:

	Bring code contribution from John Biddiscombe into trunk, according to
IP assignment #002 (on file).  Checkin message from John is:

	This patch includes the changes necessary to compile a Virtual File
	Driver outside of the main hdf5 build and still have it link against
	the hdf5 core and work correctly at run-time.

	Certain MPI-IO related VFD checks were hard-coded in the hdf5 source
	and so it was not possible to extend the functionality to new drivers.
 
	Removed IS_H5FD_MPI macros and replaced with H5F_HAS_FEATURE calls with
	new keys, H5FD_FEAT_HAS_MPI and H5FD_FEAT_ALLOCATE_EARLY.
 
	Change H5FD cleanup (term_interface) so that file drivers call
	terminate when their class types are deleted instead of explicitly
	being called from the finalization code. Move the terminate call out
	of H5I and put it into the FD class_free call. Remove the now obsolete
	check of handles after cleaning types at termination time.
 
Tested on:
        FreeBSD/32 6.3 (duty) in debug mode
        FreeBSD/64 6.3 (liberty) w/C++ & FORTRAN, in debug mode
        FreeBSD/32 8.2 (loyalty) w/gcc4.6, w/C++ & FORTRAN, in debug mode
        FreeBSD/64 8.2 (freedom) w/gcc4.6, 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 (koala) 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 (ember) w/Intel compilers, w/C++ & FORTRAN,
                in production mode
        Linux/64-amd64 2.6 (abe) w/parallel, w/FORTRAN, in debug mode

1 files changed, 14 insertions, 2 deletions

diff --git a/src/H5FDpublic.h b/src/H5FDpublic.h
index c8ec658..f495e2d 100644
--- a/src/H5FDpublic.h
+++ b/src/H5FDpublic.h
@@ -209,8 +209,19 @@ typedef enum H5F_mem_t	H5FD_mem_t;
      * the handle for the VFD (returned with the 'get_handle' callback) is
      * of type 'int' and is compatible with POSIX I/O calls.
      */
-#define H5FD_FEAT_POSIX_COMPAT_HANDLE   0x00000080
-
+#define H5FD_FEAT_POSIX_COMPAT_HANDLE   0x00000080    
+    /*
+     * Defining the H5FD_FEAT_HAS_MPI for a VFL driver means that
+     * the driver makes use of MPI communication and code may retrieve
+     * communicator/rank information from it
+     */
+#define H5FD_FEAT_HAS_MPI               0x00000100
+    /*
+     * Defining the H5FD_FEAT_ALLOCATE_EARLY for a VFL driver means that
+     * the library will use the H5D_ALLOC_TIME_EARLY on dataset create
+     * instead of the default H5D_ALLOC_TIME_LATE
+     */
+#define H5FD_FEAT_ALLOCATE_EARLY        0x00000200
 
 /* Forward declaration */
 typedef struct H5FD_t H5FD_t;
@@ -220,6 +231,7 @@ typedef struct H5FD_class_t {
     const char *name;
     haddr_t maxaddr;
     H5F_close_degree_t fc_degree;
+    herr_t  (*terminate)(void);
     hsize_t (*sb_size)(H5FD_t *file);
     herr_t  (*sb_encode)(H5FD_t *file, char *name/*out*/,
                          unsigned char *p/*out*/);