1 /*-*- Mode: C; c-basic-offset: 8 -*-*/ 2 3 /*** 4 This file is part of libcanberra. 5 6 Copyright 2008 Lennart Poettering 7 8 libcanberra is free software; you can redistribute it and/or modify 9 it under the terms of the GNU Lesser General Public License as 10 published by the Free Software Foundation, either version 2.1 of the 11 License, or (at your option) any later version. 12 13 libcanberra is distributed in the hope that it will be useful, but 14 WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 Lesser General Public License for more details. 17 18 You should have received a copy of the GNU Lesser General Public 19 License along with libcanberra. If not, see 20 <http://www.gnu.org/licenses/>. 21 ***/ 22 23 #ifdef HAVE_CONFIG_H 24 #include <config.h> 25 #endif 26 27 #include <pthread.h> 28 #include <errno.h> 29 30 #include "mutex.h" 31 #include "malloc.h" 32 33 struct ca_mutex { 34 pthread_mutex_t mutex; 35 }; 36 ca_mutex_new(void)37ca_mutex* ca_mutex_new(void) { 38 ca_mutex *m; 39 40 if (!(m = ca_new(ca_mutex, 1))) 41 return NULL; 42 43 if (pthread_mutex_init(&m->mutex, NULL) < 0) { 44 ca_free(m); 45 return NULL; 46 } 47 48 return m; 49 } 50 ca_mutex_free(ca_mutex * m)51void ca_mutex_free(ca_mutex *m) { 52 ca_assert(m); 53 54 ca_assert_se(pthread_mutex_destroy(&m->mutex) == 0); 55 ca_free(m); 56 } 57 ca_mutex_lock(ca_mutex * m)58void ca_mutex_lock(ca_mutex *m) { 59 ca_assert(m); 60 61 ca_assert_se(pthread_mutex_lock(&m->mutex) == 0); 62 } 63 ca_mutex_try_lock(ca_mutex * m)64ca_bool_t ca_mutex_try_lock(ca_mutex *m) { 65 int r; 66 ca_assert(m); 67 68 if ((r = pthread_mutex_trylock(&m->mutex)) != 0) { 69 ca_assert(r == EBUSY); 70 return FALSE; 71 } 72 73 return TRUE; 74 } 75 ca_mutex_unlock(ca_mutex * m)76void ca_mutex_unlock(ca_mutex *m) { 77 ca_assert(m); 78 79 ca_assert_se(pthread_mutex_unlock(&m->mutex) == 0); 80 } 81