/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2013 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <pthread.h> #include <unistd.h> #include "sync.h" static void *sync_thread(void *p) { sync(); return NULL; } int asynchronous_sync(void) { pthread_attr_t a; pthread_t t; int r; /* It kinda sucks that we have to resort to threads to * implement an asynchronous sync(), but well, such is * life. * * Note that issuing this command right before exiting a * process will cause the process to wait for the sync() to * complete. This function hence is nicely asynchronous really * only in long running processes. */ r = pthread_attr_init(&a); if (r != 0) return -r; r = pthread_attr_setdetachstate(&a, PTHREAD_CREATE_DETACHED); if (r != 0) { r = -r; goto finish; } r = pthread_create(&t, &a, sync_thread, NULL); if (r != 0) { r = -r; goto finish; } finish: pthread_attr_destroy(&a); return r; }