[svn-r12902] Checkin of Shared Object Header Message work.

This feature is still in progress; Shared Object Header Messages are not
complete as a feature and are not thoroughly tested.  There are still
"TODO" comments in the code (comments with the word "JAMES" in them,
so as not to be confused with other TODO comments).

Hopefully this checkin will reduce the liklihood of conflicts as I finish
implementing this feature.

All current tests pass on juniper, copper (parallel), heping, kagiso, and mir.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/H5S.c b/src/H5S.c
index 1ea2f21..fa58bc9 100644
--- a/src/H5S.c
+++ b/src/H5S.c
@@ -331,6 +331,9 @@ H5S_create(H5S_class_t type)
 
         /* Reset common selection info pointer */
         ret_value->select.sel_info.hslab=NULL;
+
+        /* Reset "shared" info on extent */
+        ret_value->extent.sh_loc.flags = 0;
     } /* end if */
 
 done:
@@ -639,6 +642,10 @@ H5S_extent_copy(H5S_extent_t *dst, const H5S_extent_t *src)
             break;
     }
 
+    /* Copy the shared object info */
+    if(NULL == H5O_copy(H5O_SHARED_ID, &(src->sh_loc), &(dst->sh_loc)))
+        HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCOPY, FAIL, "can't copy shared information");
+
 done:
     FUNC_LEAVE_NOAPI(ret_value);
 }
@@ -1530,6 +1537,13 @@ H5S_extend (H5S_t *space, const hsize_t *size)
         if(H5S_GET_SELECT_TYPE(space)==H5S_SEL_ALL)
             if(H5S_select_all(space, FALSE)<0)
                 HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't change selection");
+
+        /* Mark the dataspace as no longer shared if it was before */
+        /* JAMES: passes in NULL for the file because the file has nothing to do with it.
+         * can I eliminate the file completely from sharing?
+         */
+        if(H5O_reset_share(NULL, H5O_SDSPACE_ID, space) < 0)
+            HGOTO_ERROR(H5E_DATASPACE, H5E_CANTRESET, FAIL, "can't stop sharing dataspace")
     }
 
 done: