|
Packit |
3ae693 |
/*-*- Mode: C; c-basic-offset: 8 -*-*/
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
/***
|
|
Packit |
3ae693 |
This file is part of libcanberra.
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
Copyright 2009 Lennart Poettering
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
libcanberra is free software; you can redistribute it and/or modify
|
|
Packit |
3ae693 |
it under the terms of the GNU Lesser General Public License as
|
|
Packit |
3ae693 |
published by the Free Software Foundation, either version 2.1 of the
|
|
Packit |
3ae693 |
License, or (at your option) any later version.
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
libcanberra is distributed in the hope that it will be useful, but
|
|
Packit |
3ae693 |
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
3ae693 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
3ae693 |
Lesser General Public License for more details.
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
You should have received a copy of the GNU Lesser General Public
|
|
Packit |
3ae693 |
License along with libcanberra. If not, see
|
|
Packit |
3ae693 |
<http://www.gnu.org/licenses/>.
|
|
Packit |
3ae693 |
***/
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
#ifdef HAVE_CONFIG_H
|
|
Packit |
3ae693 |
#include <config.h>
|
|
Packit |
3ae693 |
#endif
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
#include <unistd.h>
|
|
Packit |
3ae693 |
#include <sys/types.h>
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
#include "fork-detect.h"
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
int ca_detect_fork(void) {
|
|
Packit |
3ae693 |
static volatile pid_t pid = (pid_t) -1;
|
|
Packit |
3ae693 |
pid_t v, we;
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
/* Some really stupid applications (Hey, vim, that means you!)
|
|
Packit |
3ae693 |
* love to fork after initializing gtk/libcanberra. This is really
|
|
Packit |
3ae693 |
* bad style. We however have to deal with this cleanly, so we try
|
|
Packit |
3ae693 |
* to detect the forks making sure all our calls fail cleanly
|
|
Packit |
3ae693 |
* after the fork. */
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
/* Ideally we'd use atomic operations here, but we don't have them
|
|
Packit |
3ae693 |
* and this is not exactly crucial, so we don't care */
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
v = pid;
|
|
Packit |
3ae693 |
we = getpid();
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
if (v == we || v == (pid_t) -1) {
|
|
Packit |
3ae693 |
pid = we;
|
|
Packit |
3ae693 |
return 0;
|
|
Packit |
3ae693 |
}
|
|
Packit |
3ae693 |
|
|
Packit |
3ae693 |
return 1;
|
|
Packit |
3ae693 |
}
|