mirror of https://github.com/ARMmbed/mbed-os.git
107 lines
2.4 KiB
C
107 lines
2.4 KiB
C
/*
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* Implementation for Posix compliant platforms
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*
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* Copyright (c) 2016 Christopher Haster
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "equeue/equeue_platform.h"
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#if defined(EQUEUE_PLATFORM_POSIX)
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#include <time.h>
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#include <sys/time.h>
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#include <errno.h>
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// Tick operations
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unsigned equeue_tick(void) {
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struct timeval tv;
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gettimeofday(&tv, 0);
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return (unsigned)(tv.tv_sec*1000 + tv.tv_usec/1000);
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}
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// Mutex operations
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int equeue_mutex_create(equeue_mutex_t *m) {
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return pthread_mutex_init(m, 0);
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}
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void equeue_mutex_destroy(equeue_mutex_t *m) {
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pthread_mutex_destroy(m);
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}
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void equeue_mutex_lock(equeue_mutex_t *m) {
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pthread_mutex_lock(m);
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}
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void equeue_mutex_unlock(equeue_mutex_t *m) {
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pthread_mutex_unlock(m);
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}
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// Semaphore operations
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int equeue_sema_create(equeue_sema_t *s) {
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int err = pthread_mutex_init(&s->mutex, 0);
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if (err) {
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return err;
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}
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err = pthread_cond_init(&s->cond, 0);
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if (err) {
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return err;
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}
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s->signal = false;
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return 0;
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}
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void equeue_sema_destroy(equeue_sema_t *s) {
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pthread_cond_destroy(&s->cond);
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pthread_mutex_destroy(&s->mutex);
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}
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void equeue_sema_signal(equeue_sema_t *s) {
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pthread_mutex_lock(&s->mutex);
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s->signal = true;
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pthread_cond_signal(&s->cond);
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pthread_mutex_unlock(&s->mutex);
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}
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bool equeue_sema_wait(equeue_sema_t *s, int ms) {
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pthread_mutex_lock(&s->mutex);
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if (!s->signal) {
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if (ms < 0) {
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pthread_cond_wait(&s->cond, &s->mutex);
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} else {
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struct timeval tv;
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gettimeofday(&tv, 0);
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struct timespec ts = {
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.tv_sec = ms/1000 + tv.tv_sec,
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.tv_nsec = ms*1000000 + tv.tv_usec*1000,
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};
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pthread_cond_timedwait(&s->cond, &s->mutex, &ts);
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}
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}
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bool signal = s->signal;
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s->signal = false;
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pthread_mutex_unlock(&s->mutex);
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return signal;
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}
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#endif
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