67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
/* Copyright (C) 2008-2019 Free Software Foundation, Inc.
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Contributed by Jakub Jelinek <jakub@redhat.com>.
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This file is part of the GNU Offloading and Multi Processing Library
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(libgomp).
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Libgomp is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/* This is a generic POSIX implementation of a mutex synchronization
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mechanism for libgomp. This type is private to the library. */
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#ifndef GOMP_PTRLOCK_H
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#define GOMP_PTRLOCK_H 1
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typedef struct { void *ptr; gomp_mutex_t lock; } gomp_ptrlock_t;
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static inline void gomp_ptrlock_init (gomp_ptrlock_t *ptrlock, void *ptr)
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{
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ptrlock->ptr = ptr;
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gomp_mutex_init (&ptrlock->lock);
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}
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static inline void *gomp_ptrlock_get (gomp_ptrlock_t *ptrlock)
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{
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if (ptrlock->ptr != NULL)
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return ptrlock->ptr;
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gomp_mutex_lock (&ptrlock->lock);
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if (ptrlock->ptr != NULL)
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{
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gomp_mutex_unlock (&ptrlock->lock);
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return ptrlock->ptr;
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}
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return NULL;
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}
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static inline void gomp_ptrlock_set (gomp_ptrlock_t *ptrlock, void *ptr)
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{
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ptrlock->ptr = ptr;
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gomp_mutex_unlock (&ptrlock->lock);
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}
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static inline void gomp_ptrlock_destroy (gomp_ptrlock_t *ptrlock)
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{
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gomp_mutex_destroy (&ptrlock->lock);
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}
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#endif /* GOMP_PTRLOCK_H */
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