diff options
Diffstat (limited to 'src/H5FDlog.c')
| -rw-r--r-- | src/H5FDlog.c | 81 |
1 files changed, 74 insertions, 7 deletions
diff --git a/src/H5FDlog.c b/src/H5FDlog.c index eb2c0e3..a8228e0 100644 --- a/src/H5FDlog.c +++ b/src/H5FDlog.c @@ -179,6 +179,8 @@ static herr_t H5FD_log_read(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr static herr_t H5FD_log_write(H5FD_t *_file, H5FD_mem_t type, hid_t fapl_id, haddr_t addr, size_t size, const void *buf); static herr_t H5FD_log_truncate(H5FD_t *_file, hid_t dxpl_id, hbool_t closing); +static herr_t H5FD_log_lock(H5FD_t *_file, hbool_t rw); +static herr_t H5FD_log_unlock(H5FD_t *_file); static const H5FD_class_t H5FD_log_g = { "log", /*name */ @@ -210,8 +212,8 @@ static const H5FD_class_t H5FD_log_g = { H5FD_log_write, /*write */ NULL, /*flush */ H5FD_log_truncate, /*truncate */ - NULL, /*lock */ - NULL, /*unlock */ + H5FD_log_lock, /*lock */ + H5FD_log_unlock, /*unlock */ H5FD_FLMAP_DICHOTOMY /*fl_map */ }; @@ -888,11 +890,11 @@ H5FD_log_query(const H5FD_t *_file, unsigned long *flags /* out */) /* Set the VFL feature flags that this driver supports */ if(flags) { *flags = 0; - *flags |= H5FD_FEAT_AGGREGATE_METADATA; /* OK to aggregate metadata allocations */ - *flags |= H5FD_FEAT_ACCUMULATE_METADATA; /* OK to accumulate metadata for faster writes */ - *flags |= H5FD_FEAT_DATA_SIEVE; /* OK to perform data sieving for faster raw data reads & writes */ - *flags |= H5FD_FEAT_AGGREGATE_SMALLDATA; /* OK to aggregate "small" raw data allocations */ - *flags |= H5FD_FEAT_POSIX_COMPAT_HANDLE; /* VFD handle is POSIX I/O call compatible */ + *flags |= H5FD_FEAT_AGGREGATE_METADATA; /* OK to aggregate metadata allocations */ + *flags |= H5FD_FEAT_ACCUMULATE_METADATA; /* OK to accumulate metadata for faster writes */ + *flags |= H5FD_FEAT_DATA_SIEVE; /* OK to perform data sieving for faster raw data reads & writes */ + *flags |= H5FD_FEAT_AGGREGATE_SMALLDATA; /* OK to aggregate "small" raw data allocations */ + *flags |= H5FD_FEAT_POSIX_COMPAT_HANDLE; /* VFD handle is POSIX I/O call compatible */ /* Check for flags that are set by h5repart */ if(file && file->fam_to_sec2) @@ -1556,3 +1558,68 @@ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5FD_log_truncate() */ + +/*------------------------------------------------------------------------- + * Function: H5FD_log_lock + * + * Purpose: Place a lock on the file + * + * Return: Success: SUCCEED + * Failure: FAIL, file not locked. + * + * Programmer: Vailin Choi; May 2013 + * + *------------------------------------------------------------------------- + */ +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 */ + + FUNC_ENTER_NOAPI_NOINIT + + /* Sanity check */ + 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") + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5FD_log_lock() */ + + +/*------------------------------------------------------------------------- + * Function: H5FD_log_unlock + * + * Purpose: Remove the existing lock on the file + * + * Return: SUCCEED/FAIL + * + * Programmer: Vailin Choi; May 2013 + * + *------------------------------------------------------------------------- + */ +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 */ + + 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") + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5FD_log_unlock() */ + |