ST / ST_Events-old

This is a fork of the `events` subdirectory of https://github.com/ARMmbed/mbed-os

Dependents:   HelloWorld_CCA01M1 HelloWorld_CCA02M1 CI-data-logger-server HelloWorld_CCA02M1 ... more

This is a fork of the events subdirectory of https://github.com/ARMmbed/mbed-os.

Note, you must import this library with import name: events!!!

equeue/equeue_posix.c@0:a792d4bf36c2, 2016-09-29 (annotated)

Committer:
Bogdan Marinescu
Date:
Thu Sep 29 12:38:02 2016 +0300
Revision:
0:a792d4bf36c2
Child:
2:a60d8117d0e0
Added mbed-events library



Added mbed-events from https://github.com/ARMMbed/mbed-events. Changes

from upstream:



- the whole code is licensed under the Apache license. Sources and

  headers were updates with this information.

- removed the porting layers for Windows and FreeRTOS and the references

  to these porting layers in equeue_platform.h.

- moved the TESTS directory in mbed-events to the TESTS directory of

  mbed-os.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Bogdan Marinescu 0:a792d4bf36c2 1 /*
Bogdan Marinescu 0:a792d4bf36c2 2 * Implementation for Posix compliant platforms
Bogdan Marinescu 0:a792d4bf36c2 3 *
Bogdan Marinescu 0:a792d4bf36c2 4 * Copyright (c) 2016 Christopher Haster
Bogdan Marinescu 0:a792d4bf36c2 5 *
Bogdan Marinescu 0:a792d4bf36c2 6 * Licensed under the Apache License, Version 2.0 (the "License");
Bogdan Marinescu 0:a792d4bf36c2 7 * you may not use this file except in compliance with the License.
Bogdan Marinescu 0:a792d4bf36c2 8 * You may obtain a copy of the License at
Bogdan Marinescu 0:a792d4bf36c2 9 *
Bogdan Marinescu 0:a792d4bf36c2 10 * http://www.apache.org/licenses/LICENSE-2.0
Bogdan Marinescu 0:a792d4bf36c2 11 *
Bogdan Marinescu 0:a792d4bf36c2 12 * Unless required by applicable law or agreed to in writing, software
Bogdan Marinescu 0:a792d4bf36c2 13 * distributed under the License is distributed on an "AS IS" BASIS,
Bogdan Marinescu 0:a792d4bf36c2 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Bogdan Marinescu 0:a792d4bf36c2 15 * See the License for the specific language governing permissions and
Bogdan Marinescu 0:a792d4bf36c2 16 * limitations under the License.
Bogdan Marinescu 0:a792d4bf36c2 17 */
Bogdan Marinescu 0:a792d4bf36c2 18 #include "equeue_platform.h"
Bogdan Marinescu 0:a792d4bf36c2 19
Bogdan Marinescu 0:a792d4bf36c2 20 #if defined(EQUEUE_PLATFORM_POSIX)
Bogdan Marinescu 0:a792d4bf36c2 21
Bogdan Marinescu 0:a792d4bf36c2 22 #include <time.h>
Bogdan Marinescu 0:a792d4bf36c2 23 #include <sys/time.h>
Bogdan Marinescu 0:a792d4bf36c2 24 #include <errno.h>
Bogdan Marinescu 0:a792d4bf36c2 25
Bogdan Marinescu 0:a792d4bf36c2 26
Bogdan Marinescu 0:a792d4bf36c2 27 // Tick operations
Bogdan Marinescu 0:a792d4bf36c2 28 unsigned equeue_tick(void) {
Bogdan Marinescu 0:a792d4bf36c2 29 struct timeval tv;
Bogdan Marinescu 0:a792d4bf36c2 30 gettimeofday(&tv, 0);
Bogdan Marinescu 0:a792d4bf36c2 31 return (unsigned)(tv.tv_sec*1000 + tv.tv_usec/1000);
Bogdan Marinescu 0:a792d4bf36c2 32 }
Bogdan Marinescu 0:a792d4bf36c2 33
Bogdan Marinescu 0:a792d4bf36c2 34
Bogdan Marinescu 0:a792d4bf36c2 35 // Mutex operations
Bogdan Marinescu 0:a792d4bf36c2 36 int equeue_mutex_create(equeue_mutex_t *m) {
Bogdan Marinescu 0:a792d4bf36c2 37 return pthread_mutex_init(m, 0);
Bogdan Marinescu 0:a792d4bf36c2 38 }
Bogdan Marinescu 0:a792d4bf36c2 39
Bogdan Marinescu 0:a792d4bf36c2 40 void equeue_mutex_destroy(equeue_mutex_t *m) {
Bogdan Marinescu 0:a792d4bf36c2 41 pthread_mutex_destroy(m);
Bogdan Marinescu 0:a792d4bf36c2 42 }
Bogdan Marinescu 0:a792d4bf36c2 43
Bogdan Marinescu 0:a792d4bf36c2 44 void equeue_mutex_lock(equeue_mutex_t *m) {
Bogdan Marinescu 0:a792d4bf36c2 45 pthread_mutex_lock(m);
Bogdan Marinescu 0:a792d4bf36c2 46 }
Bogdan Marinescu 0:a792d4bf36c2 47
Bogdan Marinescu 0:a792d4bf36c2 48 void equeue_mutex_unlock(equeue_mutex_t *m) {
Bogdan Marinescu 0:a792d4bf36c2 49 pthread_mutex_unlock(m);
Bogdan Marinescu 0:a792d4bf36c2 50 }
Bogdan Marinescu 0:a792d4bf36c2 51
Bogdan Marinescu 0:a792d4bf36c2 52
Bogdan Marinescu 0:a792d4bf36c2 53 // Semaphore operations
Bogdan Marinescu 0:a792d4bf36c2 54 int equeue_sema_create(equeue_sema_t *s) {
Bogdan Marinescu 0:a792d4bf36c2 55 int err = pthread_mutex_init(&s->mutex, 0);
Bogdan Marinescu 0:a792d4bf36c2 56 if (err) {
Bogdan Marinescu 0:a792d4bf36c2 57 return err;
Bogdan Marinescu 0:a792d4bf36c2 58 }
Bogdan Marinescu 0:a792d4bf36c2 59
Bogdan Marinescu 0:a792d4bf36c2 60 err = pthread_cond_init(&s->cond, 0);
Bogdan Marinescu 0:a792d4bf36c2 61 if (err) {
Bogdan Marinescu 0:a792d4bf36c2 62 return err;
Bogdan Marinescu 0:a792d4bf36c2 63 }
Bogdan Marinescu 0:a792d4bf36c2 64
Bogdan Marinescu 0:a792d4bf36c2 65 s->signal = false;
Bogdan Marinescu 0:a792d4bf36c2 66 return 0;
Bogdan Marinescu 0:a792d4bf36c2 67 }
Bogdan Marinescu 0:a792d4bf36c2 68
Bogdan Marinescu 0:a792d4bf36c2 69 void equeue_sema_destroy(equeue_sema_t *s) {
Bogdan Marinescu 0:a792d4bf36c2 70 pthread_cond_destroy(&s->cond);
Bogdan Marinescu 0:a792d4bf36c2 71 pthread_mutex_destroy(&s->mutex);
Bogdan Marinescu 0:a792d4bf36c2 72 }
Bogdan Marinescu 0:a792d4bf36c2 73
Bogdan Marinescu 0:a792d4bf36c2 74 void equeue_sema_signal(equeue_sema_t *s) {
Bogdan Marinescu 0:a792d4bf36c2 75 pthread_mutex_lock(&s->mutex);
Bogdan Marinescu 0:a792d4bf36c2 76 s->signal = true;
Bogdan Marinescu 0:a792d4bf36c2 77 pthread_cond_signal(&s->cond);
Bogdan Marinescu 0:a792d4bf36c2 78 pthread_mutex_unlock(&s->mutex);
Bogdan Marinescu 0:a792d4bf36c2 79 }
Bogdan Marinescu 0:a792d4bf36c2 80
Bogdan Marinescu 0:a792d4bf36c2 81 bool equeue_sema_wait(equeue_sema_t *s, int ms) {
Bogdan Marinescu 0:a792d4bf36c2 82 pthread_mutex_lock(&s->mutex);
Bogdan Marinescu 0:a792d4bf36c2 83 if (!s->signal) {
Bogdan Marinescu 0:a792d4bf36c2 84 if (ms < 0) {
Bogdan Marinescu 0:a792d4bf36c2 85 pthread_cond_wait(&s->cond, &s->mutex);
Bogdan Marinescu 0:a792d4bf36c2 86 } else {
Bogdan Marinescu 0:a792d4bf36c2 87 struct timeval tv;
Bogdan Marinescu 0:a792d4bf36c2 88 gettimeofday(&tv, 0);
Bogdan Marinescu 0:a792d4bf36c2 89
Bogdan Marinescu 0:a792d4bf36c2 90 struct timespec ts = {
Bogdan Marinescu 0:a792d4bf36c2 91 .tv_sec = ms/1000 + tv.tv_sec,
Bogdan Marinescu 0:a792d4bf36c2 92 .tv_nsec = ms*1000000 + tv.tv_usec*1000,
Bogdan Marinescu 0:a792d4bf36c2 93 };
Bogdan Marinescu 0:a792d4bf36c2 94
Bogdan Marinescu 0:a792d4bf36c2 95 pthread_cond_timedwait(&s->cond, &s->mutex, &ts);
Bogdan Marinescu 0:a792d4bf36c2 96 }
Bogdan Marinescu 0:a792d4bf36c2 97 }
Bogdan Marinescu 0:a792d4bf36c2 98
Bogdan Marinescu 0:a792d4bf36c2 99 bool signal = s->signal;
Bogdan Marinescu 0:a792d4bf36c2 100 s->signal = false;
Bogdan Marinescu 0:a792d4bf36c2 101 pthread_mutex_unlock(&s->mutex);
Bogdan Marinescu 0:a792d4bf36c2 102
Bogdan Marinescu 0:a792d4bf36c2 103 return signal;
Bogdan Marinescu 0:a792d4bf36c2 104 }
Bogdan Marinescu 0:a792d4bf36c2 105
Bogdan Marinescu 0:a792d4bf36c2 106 #endif