3 Copyright (C) 2013 sapier, < sapier AT gmx DOT net >
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #include "jthread/jsemaphore.h"
27 #define UNUSED(expr) do { (void)(expr); } while (0)
35 #define sem_t semaphore_t
36 #define sem_init(s, p, c) semaphore_create(mach_task_self(), (s), 0, (c))
37 #define sem_wait(s) semaphore_wait(*(s))
38 #define sem_post(s) semaphore_signal(*(s))
39 #define sem_destroy(s) semaphore_destroy(mach_task_self(), *(s))
40 pthread_mutex_t semcount_mutex;
43 JSemaphore::JSemaphore() {
44 int sem_init_retval = sem_init(&m_semaphore,0,0);
45 assert(sem_init_retval == 0);
46 UNUSED(sem_init_retval);
52 JSemaphore::~JSemaphore() {
53 int sem_destroy_retval = sem_destroy(&m_semaphore);
55 // WORKAROUND for broken bionic semaphore implementation!
57 (sem_destroy_retval == 0) ||
61 assert(sem_destroy_retval == 0);
63 UNUSED(sem_destroy_retval);
66 JSemaphore::JSemaphore(int initval) {
67 int sem_init_retval = sem_init(&m_semaphore,0,initval);
68 assert(sem_init_retval == 0);
69 UNUSED(sem_init_retval);
72 void JSemaphore::Post() {
73 int sem_post_retval = sem_post(&m_semaphore);
74 assert(sem_post_retval == 0);
75 UNUSED(sem_post_retval);
77 pthread_mutex_lock(&semcount_mutex);
79 pthread_mutex_unlock(&semcount_mutex);
83 void JSemaphore::Wait() {
84 int sem_wait_retval = sem_wait(&m_semaphore);
85 assert(sem_wait_retval == 0);
86 UNUSED(sem_wait_retval);
88 pthread_mutex_lock(&semcount_mutex);
90 pthread_mutex_unlock(&semcount_mutex);
94 bool JSemaphore::Wait(unsigned int time_ms) {
96 mach_timespec_t waittime;
97 waittime.tv_sec = time_ms / 1000;
98 waittime.tv_nsec = 1000000 * (time_ms % 1000);
100 struct timespec waittime;
104 if (gettimeofday(&now, NULL) == -1) {
105 assert("Unable to get time by clock_gettime!" == 0);
110 waittime.tv_nsec = ((time_ms % 1000) * 1000 * 1000) + (now.tv_usec * 1000);
111 waittime.tv_sec = (time_ms / 1000) + (waittime.tv_nsec / (1000*1000*1000)) + now.tv_sec;
112 waittime.tv_nsec %= 1000*1000*1000;
117 int sem_wait_retval = semaphore_timedwait(m_semaphore, waittime);
119 int sem_wait_retval = sem_timedwait(&m_semaphore, &waittime);
122 if (sem_wait_retval == 0)
125 pthread_mutex_lock(&semcount_mutex);
127 pthread_mutex_unlock(&semcount_mutex);
132 assert((errno == ETIMEDOUT) || (errno == EINTR));
135 return sem_wait_retval == 0 ? true : false;
138 int JSemaphore::GetValue() {
141 pthread_mutex_lock(&semcount_mutex);
143 pthread_mutex_unlock(&semcount_mutex);
145 sem_getvalue(&m_semaphore, &retval);