1*38fd1498Szrj /* Copyright (C) 2008-2018 Free Software Foundation, Inc.
2*38fd1498Szrj Contributed by Jakub Jelinek <jakub@redhat.com>.
3*38fd1498Szrj
4*38fd1498Szrj This file is part of the GNU Offloading and Multi Processing Library
5*38fd1498Szrj (libgomp).
6*38fd1498Szrj
7*38fd1498Szrj Libgomp is free software; you can redistribute it and/or modify it
8*38fd1498Szrj under the terms of the GNU General Public License as published by
9*38fd1498Szrj the Free Software Foundation; either version 3, or (at your option)
10*38fd1498Szrj any later version.
11*38fd1498Szrj
12*38fd1498Szrj Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
13*38fd1498Szrj WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14*38fd1498Szrj FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15*38fd1498Szrj more details.
16*38fd1498Szrj
17*38fd1498Szrj Under Section 7 of GPL version 3, you are granted additional
18*38fd1498Szrj permissions described in the GCC Runtime Library Exception, version
19*38fd1498Szrj 3.1, as published by the Free Software Foundation.
20*38fd1498Szrj
21*38fd1498Szrj You should have received a copy of the GNU General Public License and
22*38fd1498Szrj a copy of the GCC Runtime Library Exception along with this program;
23*38fd1498Szrj see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24*38fd1498Szrj <http://www.gnu.org/licenses/>. */
25*38fd1498Szrj
26*38fd1498Szrj /* This is a generic POSIX implementation of a mutex synchronization
27*38fd1498Szrj mechanism for libgomp. This type is private to the library. */
28*38fd1498Szrj
29*38fd1498Szrj #ifndef GOMP_PTRLOCK_H
30*38fd1498Szrj #define GOMP_PTRLOCK_H 1
31*38fd1498Szrj
32*38fd1498Szrj typedef struct { void *ptr; gomp_mutex_t lock; } gomp_ptrlock_t;
33*38fd1498Szrj
gomp_ptrlock_init(gomp_ptrlock_t * ptrlock,void * ptr)34*38fd1498Szrj static inline void gomp_ptrlock_init (gomp_ptrlock_t *ptrlock, void *ptr)
35*38fd1498Szrj {
36*38fd1498Szrj ptrlock->ptr = ptr;
37*38fd1498Szrj gomp_mutex_init (&ptrlock->lock);
38*38fd1498Szrj }
39*38fd1498Szrj
gomp_ptrlock_get(gomp_ptrlock_t * ptrlock)40*38fd1498Szrj static inline void *gomp_ptrlock_get (gomp_ptrlock_t *ptrlock)
41*38fd1498Szrj {
42*38fd1498Szrj if (ptrlock->ptr != NULL)
43*38fd1498Szrj return ptrlock->ptr;
44*38fd1498Szrj
45*38fd1498Szrj gomp_mutex_lock (&ptrlock->lock);
46*38fd1498Szrj if (ptrlock->ptr != NULL)
47*38fd1498Szrj {
48*38fd1498Szrj gomp_mutex_unlock (&ptrlock->lock);
49*38fd1498Szrj return ptrlock->ptr;
50*38fd1498Szrj }
51*38fd1498Szrj
52*38fd1498Szrj return NULL;
53*38fd1498Szrj }
54*38fd1498Szrj
gomp_ptrlock_set(gomp_ptrlock_t * ptrlock,void * ptr)55*38fd1498Szrj static inline void gomp_ptrlock_set (gomp_ptrlock_t *ptrlock, void *ptr)
56*38fd1498Szrj {
57*38fd1498Szrj ptrlock->ptr = ptr;
58*38fd1498Szrj gomp_mutex_unlock (&ptrlock->lock);
59*38fd1498Szrj }
60*38fd1498Szrj
gomp_ptrlock_destroy(gomp_ptrlock_t * ptrlock)61*38fd1498Szrj static inline void gomp_ptrlock_destroy (gomp_ptrlock_t *ptrlock)
62*38fd1498Szrj {
63*38fd1498Szrj gomp_mutex_destroy (&ptrlock->lock);
64*38fd1498Szrj }
65*38fd1498Szrj
66*38fd1498Szrj #endif /* GOMP_PTRLOCK_H */
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