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"
24 #define UNUSED(expr) do { (void)(expr); } while (0)
26 JSemaphore::JSemaphore() {
27 int sem_init_retval = sem_init(&m_semaphore,0,0);
28 assert(sem_init_retval == 0);
29 UNUSED(sem_init_retval);
32 JSemaphore::~JSemaphore() {
33 int sem_destroy_retval = sem_destroy(&m_semaphore);
34 assert(sem_destroy_retval == 0);
35 UNUSED(sem_destroy_retval);
38 JSemaphore::JSemaphore(int initval) {
39 int sem_init_retval = sem_init(&m_semaphore,0,initval);
40 assert(sem_init_retval == 0);
41 UNUSED(sem_init_retval);
44 void JSemaphore::Post() {
45 int sem_post_retval = sem_post(&m_semaphore);
46 assert(sem_post_retval == 0);
47 UNUSED(sem_post_retval);
50 void JSemaphore::Wait() {
51 int sem_wait_retval = sem_wait(&m_semaphore);
52 assert(sem_wait_retval == 0);
53 UNUSED(sem_wait_retval);
56 bool JSemaphore::Wait(unsigned int time_ms) {
57 struct timespec waittime;
60 if (gettimeofday(&now, NULL) == -1) {
61 assert("Unable to get time by clock_gettime!" == 0);
65 waittime.tv_nsec = ((time_ms % 1000) * 1000 * 1000) + (now.tv_usec * 1000);
66 waittime.tv_sec = (time_ms / 1000) + (waittime.tv_nsec / (1000*1000*1000)) + now.tv_sec;
67 waittime.tv_nsec %= 1000*1000*1000;
70 int sem_wait_retval = sem_timedwait(&m_semaphore,&waittime);
72 if (sem_wait_retval == 0)
77 assert((errno == ETIMEDOUT) || (errno == EINTR));
80 return sem_wait_retval == 0 ? true : false;
83 int JSemaphore::GetValue() {
86 sem_getvalue(&m_semaphore,&retval);