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43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
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#ifndef foopulseoncehfoo
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#define foopulseoncehfoo
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/* $Id$ */
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/***
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This file is part of PulseAudio.
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#include <pulsecore/atomic.h>
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typedef struct pa_once {
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pa_atomic_int_t atomic;
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} pa_once_t;
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#define PA_ONCE_INIT { PA_ATOMIC_INIT(0) }
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#define pa_once_test(o) (pa_atomic_cmpxchg(&(o)->atomic, 0, 1))
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typedef void (*pa_once_func_t) (void);
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static inline void pa_once(pa_once_t *o, pa_once_func_t f) {
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if (pa_once_test(o))
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f();
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}
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#endif
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