summaryrefslogtreecommitdiffstats
path: root/src/H5FDsec2.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/H5FDsec2.c')
-rw-r--r--src/H5FDsec2.c34
1 files changed, 21 insertions, 13 deletions
diff --git a/src/H5FDsec2.c b/src/H5FDsec2.c
index bb8f004..04a0790 100644
--- a/src/H5FDsec2.c
+++ b/src/H5FDsec2.c
@@ -922,20 +922,24 @@ done:
static herr_t
H5FD_sec2_lock(H5FD_t *_file, hbool_t rw)
{
- H5FD_sec2_t *file = (H5FD_sec2_t *)_file; /* VFD file struct */
- int lock; /* The type of lock */
- herr_t ret_value = SUCCEED; /* Return value */
+ H5FD_sec2_t *file = (H5FD_sec2_t *)_file; /* VFD file struct */
+ int lock_flags; /* file locking flags */
+ herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT
HDassert(file);
- /* Determine the type of lock */
- lock = rw ? LOCK_EX : LOCK_SH;
-
- /* Place the lock with non-blocking */
- if(HDflock(file->fd, lock | LOCK_NB) < 0)
- HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, FAIL, "unable to flock file")
+ /* Set exclusive or shared lock based on rw status */
+ lock_flags = rw ? LOCK_EX : LOCK_SH;
+
+ /* Place a non-blocking lock on the file */
+ if(HDflock(file->fd, lock_flags | LOCK_NB) < 0) {
+ if(ENOSYS == errno)
+ HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, FAIL, "file locking disabled on this file system (use HDF5_USE_FILE_LOCKING environment variable to override)")
+ else
+ HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, FAIL, "unable to lock file")
+ } /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)
@@ -956,15 +960,19 @@ done:
static herr_t
H5FD_sec2_unlock(H5FD_t *_file)
{
- H5FD_sec2_t *file = (H5FD_sec2_t *)_file; /* VFD file struct */
- herr_t ret_value = SUCCEED; /* Return value */
+ H5FD_sec2_t *file = (H5FD_sec2_t *)_file; /* VFD file struct */
+ herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_NOAPI_NOINIT
HDassert(file);
- if(HDflock(file->fd, LOCK_UN) < 0)
- HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, FAIL, "unable to flock (unlock) file")
+ if(HDflock(file->fd, LOCK_UN) < 0) {
+ if(ENOSYS == errno)
+ HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, FAIL, "file locking disabled on this file system (use HDF5_USE_FILE_LOCKING environment variable to override)")
+ else
+ HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, FAIL, "unable to unlock file")
+ } /* end if */
done:
FUNC_LEAVE_NOAPI(ret_value)