#ifndef foopulseoncehfoo
#define foopulseoncehfoo

/* $Id$ */

/***
  This file is part of PulseAudio.
 
  PulseAudio 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 of the
  License, or (at your option) any later version.
 
  PulseAudio 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 Lesser General Public
  License along with PulseAudio; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  USA.
***/

#include <pulsecore/atomic.h>

typedef struct pa_once {
    pa_atomic_int_t atomic;
} pa_once_t;

#define PA_ONCE_INIT { PA_ATOMIC_INIT(0) }

#define pa_once_test(o) (pa_atomic_cmpxchg(&(o)->atomic, 0, 1))

typedef void (*pa_once_func_t) (void);

static inline void pa_once(pa_once_t *o, pa_once_func_t f) {
    if (pa_once_test(o))
        f();
}

#endif