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43 lines
1.5 KiB
C++
43 lines
1.5 KiB
C++
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2014.
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This file is part of Sortix libpthread.
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Sortix libpthread is free software: you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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Sortix libpthread is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with Sortix libpthread. If not, see <http://www.gnu.org/licenses/>.
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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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extern "C"
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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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