-
Notifications
You must be signed in to change notification settings - Fork 195
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #10 from baidu/on-dev
merge 1.6.0 to trunk
- Loading branch information
Showing
9 changed files
with
276 additions
and
45 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| Copyright [CUP] | ||
|
|
||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
|
|
||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
|
|
||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| #!/usr/bin/env python | ||
| # -*- coding: utf-8 -* | ||
| # ############################################################# | ||
| # | ||
| # Copyright (c) Baidu.com, Inc. All Rights Reserved | ||
| # | ||
| # ############################################################# | ||
| """ | ||
| :authors: | ||
| Guannan Ma maguannan @mythmgn | ||
| :description: | ||
| file related functions | ||
| """ | ||
| import os | ||
| import sys | ||
| import fcntl | ||
|
|
||
| from cup import err | ||
| from cup import decorators | ||
|
|
||
| __all__ = [ | ||
| 'LockFile', 'FILELOCK_SHARED', 'FILELOCK_EXCLUSIVE', | ||
| 'FILELOCK_NONBLOCKING', 'FILELOCK_UNLOCK' | ||
| ] | ||
|
|
||
|
|
||
| FILELOCK_EXCLUSIVE = fcntl.LOCK_EX | ||
| FILELOCK_SHARED = fcntl.LOCK_SH | ||
| FILELOCK_NONBLOCKING = fcntl.LOCK_NB | ||
| FILELOCK_UNLOCK = fcntl.LOCK_UN | ||
|
|
||
|
|
||
| class LockFile(object): | ||
| """ | ||
| lock file class | ||
| """ | ||
|
|
||
| def __init__(self, fpath, locktype=FILELOCK_EXCLUSIVE): | ||
| """ | ||
| exclusive lockfile, by default. | ||
| Notice that the file CANNOT exist before you intialize a LockFile obj. | ||
| Otherwise, it will raise cup.err.LockFileError | ||
| :raise: | ||
| cup.err.LockFileError if we encounter errors | ||
| """ | ||
| self._fpath = fpath | ||
| self._locktype = locktype | ||
| self._fhandle = None | ||
| try: | ||
| # if FILELOCK_EXCLUSIVE == locktype: | ||
| # self._fhandle = os.open( | ||
| # self._fpath, os.O_CREAT|os.O_EXCL|os.O_RDWR | ||
| # ) | ||
| # else: | ||
| self._fhandle = os.open( | ||
| self._fpath, os.O_CREAT | os.O_RDWR | ||
| ) | ||
| except IOError as error: | ||
| raise err.LockFileError(error) | ||
| except OSError as error: | ||
| raise err.LockFileError(error) | ||
| except Exception as error: | ||
| raise err.LockFileError( | ||
| 'catch unkown error type:{0}'.format(error) | ||
| ) | ||
|
|
||
| def __del__(self): | ||
| """del the instance""" | ||
| try: | ||
| if self._fhandle is not None: | ||
| os.close(self._fhandle) | ||
| # pylint: disable=W0703 | ||
| except Exception as error: | ||
| sys.stderr.write('failed to close lockfile:{0}, msg:{1}'.format( | ||
| self._fpath, error) | ||
| ) | ||
| sys.stderr.flush() | ||
|
|
||
| @decorators.needposix | ||
| def lock(self, blocking=True): | ||
| """ | ||
| lock the file | ||
| :return: | ||
| return False if locking fails | ||
| :raise: | ||
| raise cup.err.LockFileError if blocking is False and | ||
| the lock action failed | ||
| """ | ||
| flags = 0x1 | ||
| if FILELOCK_SHARED == self._locktype: | ||
| flags = FILELOCK_SHARED | ||
| elif FILELOCK_EXCLUSIVE == self._locktype: | ||
| flags = FILELOCK_EXCLUSIVE | ||
| else: | ||
| raise err.LockFileError('does not support this lock type') | ||
| if not blocking: | ||
| flags |= FILELOCK_NONBLOCKING | ||
| ret = None | ||
| try: | ||
| ret = fcntl.flock(self._fhandle, flags) | ||
| except IOError as error: | ||
| raise err.LockFileError(error) | ||
| except Exception as error: | ||
| raise err.LockFileError(error) | ||
| return ret | ||
|
|
||
| def unlock(self): | ||
| """unlock the locked file""" | ||
| try: | ||
| fcntl.flock(self._fhandle, FILELOCK_UNLOCK) | ||
| except Exception as error: | ||
| raise err.LockFileError(error) | ||
|
|
||
|
|
||
| # TODO tempfile | ||
| # class TempFile(object): | ||
| # """ | ||
| # tempfile | ||
| # """ | ||
| # vi:set tw=0 ts=4 sw=4 nowrap fdm=indent |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.