1 /*** 2 This file is part of PulseAudio. 3 4 Copyright 2004-2006 Lennart Poettering 5 6 PulseAudio is free software; you can redistribute it and/or modify 7 it under the terms of the GNU Lesser General Public License as published 8 by the Free Software Foundation; either version 2.1 of the License, 9 or (at your option) any later version. 10 11 PulseAudio is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public License 17 along with PulseAudio; if not, see <http://www.gnu.org/licenses/>. 18 ***/ 19 20 #ifdef HAVE_CONFIG_H 21 #include <config.h> 22 #endif 23 24 #include <pulsecore/macro.h> 25 #include <pulsecore/atomic.h> 26 27 #include "sioman.h" 28 29 static pa_atomic_t stdio_inuse = PA_ATOMIC_INIT(0); 30 pa_stdio_acquire(void)31int pa_stdio_acquire(void) { 32 return pa_atomic_cmpxchg(&stdio_inuse, 0, 1) ? 0 : -1; 33 } 34 pa_stdio_release(void)35void pa_stdio_release(void) { 36 pa_assert_se(pa_atomic_cmpxchg(&stdio_inuse, 1, 0)); 37 } 38