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| -rw-r--r-- | src/flocker.py | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/flocker.py b/src/flocker.py new file mode 100644 index 0000000..8965ee2 --- /dev/null +++ b/src/flocker.py @@ -0,0 +1,31 @@ +#!/usr/bin/env python3 +# -*- coding: utf-8 -*- +''' +featherweight – A lightweight terminal news feed reader + +Copyright © 2013 Mattias Andrée (maandree@member.fsf.org) + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see <http://www.gnu.org/licenses/>. +''' +import fcntl + + +def flock(file, exclusive, nonblocking = False): + locktype = (fcntl.LOCK_EX if exclusive else fcntl.LOCK_SH) | (fcntl.LOCK_NB if nonblocking else 0) + fcntl(file.fileno(), locktype) + + +def unflock(file): + fcntl(file.fileno(), LOCK_UN) + |