diff options
Diffstat (limited to 'src/H5FDlog.c')
| -rw-r--r-- | src/H5FDlog.c | 50 |
1 files changed, 29 insertions, 21 deletions
diff --git a/src/H5FDlog.c b/src/H5FDlog.c index 9f5dfa5..a2891cb 100644 --- a/src/H5FDlog.c +++ b/src/H5FDlog.c @@ -1567,15 +1567,7 @@ static herr_t H5FD_log_truncate(H5FD_t *_file, hid_t H5_ATTR_UNUSED dxpl_id, hbool_t H5_ATTR_UNUSED closing) { H5FD_log_t *file = (H5FD_log_t *)_file; -#ifdef H5_HAVE_WIN32_API - LARGE_INTEGER li; /* 64-bit (union) integer for SetFilePointer() call */ - DWORD dwPtrLow; /* Low-order pointer bits from SetFilePointer() - * Only used as an error code here. - */ - DWORD dwError; /* DWORD error code from GetLastError() */ - BOOL bError; /* Boolean error flag */ -#endif /* H5_HAVE_WIN32_API */ -herr_t ret_value = SUCCEED; /* Return value */ + herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT @@ -1586,6 +1578,14 @@ herr_t ret_value = SUCCEED; /* Return value */ #ifdef H5_HAVE_GETTIMEOFDAY struct timeval timeval_start, timeval_stop; #endif /* H5_HAVE_GETTIMEOFDAY */ +#ifdef H5_HAVE_WIN32_API + LARGE_INTEGER li; /* 64-bit (union) integer for SetFilePointer() call */ + DWORD dwPtrLow; /* Low-order pointer bits from SetFilePointer() + * Only used as an error code here. + */ + DWORD dwError; /* DWORD error code from GetLastError() */ + BOOL bError; /* Boolean error flag */ +#endif /* H5_HAVE_WIN32_API */ #ifdef H5_HAVE_GETTIMEOFDAY if(file->fa.flags & H5FD_LOG_TIME_TRUNCATE) @@ -1677,21 +1677,25 @@ done: static herr_t H5FD_log_lock(H5FD_t *_file, hbool_t rw) { - H5FD_log_t *file = (H5FD_log_t *)_file; - int lock; - herr_t ret_value = SUCCEED; /* Return value */ + H5FD_log_t *file = (H5FD_log_t *)_file; /* VFD file struct */ + int lock_flags; /* file locking flags */ + herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT /* Sanity check */ HDassert(file); - /* Determine the type of lock */ - lock = rw ? LOCK_EX : LOCK_SH; + /* Set exclusive or shared lock based on rw status */ + lock_flags = 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") + /* 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) @@ -1712,15 +1716,19 @@ done: static herr_t H5FD_log_unlock(H5FD_t *_file) { - H5FD_log_t *file = (H5FD_log_t *)_file; /* VFD file struct */ - herr_t ret_value = SUCCEED; /* Return value */ + H5FD_log_t *file = (H5FD_log_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) |