Rahul Dahiya / Mbed OS STM32F7 Ethernet

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mbed-os/events/equeue/equeue_posix.c@0:fb8047b156bb, 2020-01-15 (annotated)

Committer:
rahul_dahiya
Date:
Wed Jan 15 15:57:15 2020 +0530
Revision:
0:fb8047b156bb
STM32F7 LWIP

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rahul_dahiya 0:fb8047b156bb 1 /*
rahul_dahiya 0:fb8047b156bb 2 * Implementation for Posix compliant platforms
rahul_dahiya 0:fb8047b156bb 3 *
rahul_dahiya 0:fb8047b156bb 4 * Copyright (c) 2016 Christopher Haster
rahul_dahiya 0:fb8047b156bb 5 *
rahul_dahiya 0:fb8047b156bb 6 * Licensed under the Apache License, Version 2.0 (the "License");
rahul_dahiya 0:fb8047b156bb 7 * you may not use this file except in compliance with the License.
rahul_dahiya 0:fb8047b156bb 8 * You may obtain a copy of the License at
rahul_dahiya 0:fb8047b156bb 9 *
rahul_dahiya 0:fb8047b156bb 10 * http://www.apache.org/licenses/LICENSE-2.0
rahul_dahiya 0:fb8047b156bb 11 *
rahul_dahiya 0:fb8047b156bb 12 * Unless required by applicable law or agreed to in writing, software
rahul_dahiya 0:fb8047b156bb 13 * distributed under the License is distributed on an "AS IS" BASIS,
rahul_dahiya 0:fb8047b156bb 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rahul_dahiya 0:fb8047b156bb 15 * See the License for the specific language governing permissions and
rahul_dahiya 0:fb8047b156bb 16 * limitations under the License.
rahul_dahiya 0:fb8047b156bb 17 */
rahul_dahiya 0:fb8047b156bb 18 #include "equeue/equeue_platform.h"
rahul_dahiya 0:fb8047b156bb 19
rahul_dahiya 0:fb8047b156bb 20 #if defined(EQUEUE_PLATFORM_POSIX)
rahul_dahiya 0:fb8047b156bb 21
rahul_dahiya 0:fb8047b156bb 22 #include <time.h>
rahul_dahiya 0:fb8047b156bb 23 #include <sys/time.h>
rahul_dahiya 0:fb8047b156bb 24 #include <errno.h>
rahul_dahiya 0:fb8047b156bb 25
rahul_dahiya 0:fb8047b156bb 26
rahul_dahiya 0:fb8047b156bb 27 // Tick operations
rahul_dahiya 0:fb8047b156bb 28 unsigned equeue_tick(void) {
rahul_dahiya 0:fb8047b156bb 29 struct timeval tv;
rahul_dahiya 0:fb8047b156bb 30 gettimeofday(&tv, 0);
rahul_dahiya 0:fb8047b156bb 31 return (unsigned)(tv.tv_sec*1000 + tv.tv_usec/1000);
rahul_dahiya 0:fb8047b156bb 32 }
rahul_dahiya 0:fb8047b156bb 33
rahul_dahiya 0:fb8047b156bb 34
rahul_dahiya 0:fb8047b156bb 35 // Mutex operations
rahul_dahiya 0:fb8047b156bb 36 int equeue_mutex_create(equeue_mutex_t *m) {
rahul_dahiya 0:fb8047b156bb 37 return pthread_mutex_init(m, 0);
rahul_dahiya 0:fb8047b156bb 38 }
rahul_dahiya 0:fb8047b156bb 39
rahul_dahiya 0:fb8047b156bb 40 void equeue_mutex_destroy(equeue_mutex_t *m) {
rahul_dahiya 0:fb8047b156bb 41 pthread_mutex_destroy(m);
rahul_dahiya 0:fb8047b156bb 42 }
rahul_dahiya 0:fb8047b156bb 43
rahul_dahiya 0:fb8047b156bb 44 void equeue_mutex_lock(equeue_mutex_t *m) {
rahul_dahiya 0:fb8047b156bb 45 pthread_mutex_lock(m);
rahul_dahiya 0:fb8047b156bb 46 }
rahul_dahiya 0:fb8047b156bb 47
rahul_dahiya 0:fb8047b156bb 48 void equeue_mutex_unlock(equeue_mutex_t *m) {
rahul_dahiya 0:fb8047b156bb 49 pthread_mutex_unlock(m);
rahul_dahiya 0:fb8047b156bb 50 }
rahul_dahiya 0:fb8047b156bb 51
rahul_dahiya 0:fb8047b156bb 52
rahul_dahiya 0:fb8047b156bb 53 // Semaphore operations
rahul_dahiya 0:fb8047b156bb 54 int equeue_sema_create(equeue_sema_t *s) {
rahul_dahiya 0:fb8047b156bb 55 int err = pthread_mutex_init(&s->mutex, 0);
rahul_dahiya 0:fb8047b156bb 56 if (err) {
rahul_dahiya 0:fb8047b156bb 57 return err;
rahul_dahiya 0:fb8047b156bb 58 }
rahul_dahiya 0:fb8047b156bb 59
rahul_dahiya 0:fb8047b156bb 60 err = pthread_cond_init(&s->cond, 0);
rahul_dahiya 0:fb8047b156bb 61 if (err) {
rahul_dahiya 0:fb8047b156bb 62 return err;
rahul_dahiya 0:fb8047b156bb 63 }
rahul_dahiya 0:fb8047b156bb 64
rahul_dahiya 0:fb8047b156bb 65 s->signal = false;
rahul_dahiya 0:fb8047b156bb 66 return 0;
rahul_dahiya 0:fb8047b156bb 67 }
rahul_dahiya 0:fb8047b156bb 68
rahul_dahiya 0:fb8047b156bb 69 void equeue_sema_destroy(equeue_sema_t *s) {
rahul_dahiya 0:fb8047b156bb 70 pthread_cond_destroy(&s->cond);
rahul_dahiya 0:fb8047b156bb 71 pthread_mutex_destroy(&s->mutex);
rahul_dahiya 0:fb8047b156bb 72 }
rahul_dahiya 0:fb8047b156bb 73
rahul_dahiya 0:fb8047b156bb 74 void equeue_sema_signal(equeue_sema_t *s) {
rahul_dahiya 0:fb8047b156bb 75 pthread_mutex_lock(&s->mutex);
rahul_dahiya 0:fb8047b156bb 76 s->signal = true;
rahul_dahiya 0:fb8047b156bb 77 pthread_cond_signal(&s->cond);
rahul_dahiya 0:fb8047b156bb 78 pthread_mutex_unlock(&s->mutex);
rahul_dahiya 0:fb8047b156bb 79 }
rahul_dahiya 0:fb8047b156bb 80
rahul_dahiya 0:fb8047b156bb 81 bool equeue_sema_wait(equeue_sema_t *s, int ms) {
rahul_dahiya 0:fb8047b156bb 82 pthread_mutex_lock(&s->mutex);
rahul_dahiya 0:fb8047b156bb 83 if (!s->signal) {
rahul_dahiya 0:fb8047b156bb 84 if (ms < 0) {
rahul_dahiya 0:fb8047b156bb 85 pthread_cond_wait(&s->cond, &s->mutex);
rahul_dahiya 0:fb8047b156bb 86 } else {
rahul_dahiya 0:fb8047b156bb 87 struct timeval tv;
rahul_dahiya 0:fb8047b156bb 88 gettimeofday(&tv, 0);
rahul_dahiya 0:fb8047b156bb 89
rahul_dahiya 0:fb8047b156bb 90 struct timespec ts = {
rahul_dahiya 0:fb8047b156bb 91 .tv_sec = ms/1000 + tv.tv_sec,
rahul_dahiya 0:fb8047b156bb 92 .tv_nsec = ms*1000000 + tv.tv_usec*1000,
rahul_dahiya 0:fb8047b156bb 93 };
rahul_dahiya 0:fb8047b156bb 94
rahul_dahiya 0:fb8047b156bb 95 pthread_cond_timedwait(&s->cond, &s->mutex, &ts);
rahul_dahiya 0:fb8047b156bb 96 }
rahul_dahiya 0:fb8047b156bb 97 }
rahul_dahiya 0:fb8047b156bb 98
rahul_dahiya 0:fb8047b156bb 99 bool signal = s->signal;
rahul_dahiya 0:fb8047b156bb 100 s->signal = false;
rahul_dahiya 0:fb8047b156bb 101 pthread_mutex_unlock(&s->mutex);
rahul_dahiya 0:fb8047b156bb 102
rahul_dahiya 0:fb8047b156bb 103 return signal;
rahul_dahiya 0:fb8047b156bb 104 }
rahul_dahiya 0:fb8047b156bb 105
rahul_dahiya 0:fb8047b156bb 106 #endif