37 lines
1.4 KiB
C
37 lines
1.4 KiB
C
/*
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* Copyright (c) 2014 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* pthread/pthread_once.c
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* Dynamic package initialization.
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*/
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#include <pthread.h>
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int pthread_once(pthread_once_t* once_control, void (*init_routine)(void))
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{
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pthread_mutex_lock(&once_control->lock);
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if ( !once_control->executed )
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{
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// TODO: If this thread is a cancellation point and is canceled, we must
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// pretend this pthread_once was never called. This means that we
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// need to ensure that once_control->lock is unlocked in the event
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// of a cancellation.
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init_routine();
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once_control->executed = 1;
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}
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pthread_mutex_unlock(&once_control->lock);
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return 0;
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}
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