[svn-r6502] Purpose:

    Update

Description:
    More changes to the FPHDF5 file driver. Too many to mention here.
    Some highlights:

        - Addition of lock/unlock methods to the driver, though they
          aren't implemented fully just yet.
        - Extra query functions to determine various things about the
          file. (If this is the captain process, etc)
        - Fixes to make things work...

Platforms tested:
    Linux

Misc. update:

1 files changed, 35 insertions, 0 deletions

diff --git a/src/H5FDfphdf5.h b/src/H5FDfphdf5.h
index 733908a..20a5c83 100644
--- a/src/H5FDfphdf5.h
+++ b/src/H5FDfphdf5.h
@@ -16,6 +16,7 @@
 #define H5FDFPHDF5_H__
 
 #include "H5FDmpio.h"
+#include "H5FDpublic.h"         /* for the H5FD_t structure         */
 
 #ifdef H5_HAVE_PARALLEL
 #   define H5FD_FPHDF5      (H5FD_fphdf5_init())
@@ -42,6 +43,38 @@
 #define H5FD_FPHDF5_XFER_DUMPING_METADATA   "H5FD_fphdf5_dumping_metadata"
 #define H5FD_FPHDF5_XFER_DUMPING_SIZE       sizeof(unsigned)
 
+/*
+ * For specifying that only the captain is allowed to allocate things at
+ * this time.
+ */
+#define H5FD_FPHDF5_CAPTN_ALLOC_ONLY        "Only_Captain_Alloc"
+#define H5FD_FPHDF5_CAPTN_ALLOC_SIZE        sizeof(unsigned)
+
+/*
+ * The description of a file belonging to this driver.
+ *
+ * The FILE_ID field is an SAP defined value. When reading/writing to the
+ * SAP, this value should be sent.
+ *
+ * The EOF field is only used just after the file is opened in order for
+ * the library to determine whether the file is empty, truncated, or
+ * okay. The FPHDF5 driver doesn't bother to keep it updated since it's
+ * an expensive operation.
+ */
+typedef struct H5FD_fphdf5_t {
+    H5FD_t      pub;            /*Public stuff, must be first (ick!)    */
+    unsigned    file_id;        /*ID used by the SAP                    */
+    MPI_File    f;              /*MPIO file handle                      */
+    MPI_Comm    comm;           /*Communicator                          */
+    MPI_Comm    barrier_comm;   /*Barrier communicator                  */
+    MPI_Info    info;           /*File information                      */
+    int         mpi_rank;       /*This process's rank                   */
+    int         mpi_size;       /*Total number of processes             */
+    haddr_t     eof;            /*End-of-file marker                    */
+    haddr_t     eoa;            /*End-of-address marker                 */
+    haddr_t     last_eoa;       /*Last known end-of-address marker      */
+} H5FD_fphdf5_t;
+
 extern const H5FD_class_t H5FD_fphdf5_g;
 
 /* Function prototypes */
@@ -78,6 +111,8 @@ H5_DLL int      H5FD_fphdf5_mpi_rank(H5FD_t *_file);
 H5_DLL int      H5FD_fphdf5_mpi_size(H5FD_t *_file);
 H5_DLL unsigned H5FD_fphdf5_file_id(H5FD_t *_file);
 H5_DLL hbool_t  H5FD_fphdf5_is_sap(H5FD_t *_file);
+H5_DLL hbool_t  H5FD_fphdf5_is_captain(H5FD_t *_file);
+H5_DLL hbool_t  H5FD_is_fphdf5_driver(H5FD_t *_file);
 
 H5_DLL herr_t   H5FD_fphdf5_write_real(H5FD_t *_file, hid_t dxpl_id,
                                        MPI_Offset mpi_off, int size,