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       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, write to the Free Software
      18                 :            :   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
      19                 :            :   USA.
      20                 :            : ***/
      21                 :            : 
      22                 :            : #ifdef HAVE_CONFIG_H
      23                 :            : #include <config.h>
      24                 :            : #endif
      25                 :            : 
      26                 :            : #include <pulsecore/macro.h>
      27                 :            : #include <pulsecore/atomic.h>
      28                 :            : 
      29                 :            : #include "sioman.h"
      30                 :            : 
      31                 :            : static pa_atomic_t stdio_inuse = PA_ATOMIC_INIT(0);
      32                 :            : 
      33                 :          0 : int pa_stdio_acquire(void) {
      34         [ #  # ]:          0 :     return pa_atomic_cmpxchg(&stdio_inuse, 0, 1) ? 0 : -1;
      35                 :            : }
      36                 :            : 
      37                 :          0 : void pa_stdio_release(void) {
      38         [ #  # ]:          0 :     pa_assert_se(pa_atomic_cmpxchg(&stdio_inuse, 1, 0));
      39                 :          0 : }