diff options
Diffstat (limited to 'libiot/sys/mutex.c')
| -rw-r--r-- | libiot/sys/mutex.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/libiot/sys/mutex.c b/libiot/sys/mutex.c new file mode 100644 index 0000000..6c63fe3 --- /dev/null +++ b/libiot/sys/mutex.c @@ -0,0 +1,155 @@ +/* + * Copyright (C) 2015 - 2018, IBEROXARXA SERVICIOS INTEGRALES, S.L. + * Copyright (C) 2015 - 2018, Jaume Olivé Petrus (jolive@whitecatboard.org) + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of the <organization> nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * * The WHITECAT logotype cannot be changed, you can remove it, but you + * cannot change it in any way. The WHITECAT logotype is: + * + * /\ /\ + * / \_____/ \ + * /_____________\ + * W H I T E C A T + * + * * Redistributions in binary form must retain all copyright notices printed + * to any local or remote output device. This include any reference to + * Lua RTOS, whitecatboard.org, Lua, and other copyright notices that may + * appear in the future. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Lua RTOS mutex api implementation over FreeRTOS + * + */ + +//#include "sdkconfig.h" +#include <FreeRTOS.h> +#include "../freertos/adds.h" + +//#include "esp_attr.h" + +#include "mutex.h" +#include "panic.h" + +int mtx_inited(struct mtx *mutex) { + return (mutex->lock != 0); +} + +void mtx_init(struct mtx *mutex, const char *name, const char *type, int opts) { + mutex->opts = opts; + + if (mutex->opts == MTX_DEF) { + mutex->lock = xSemaphoreCreateBinary(); + } else if (opts == MTX_RECURSE) { + mutex->lock = xSemaphoreCreateRecursiveMutex(); + } else { + return; + } + + if (mutex->lock) { +#if 0 //{} + if (xPortInIsrContext()) { + BaseType_t xHigherPriorityTaskWoken = pdFALSE; + xSemaphoreGiveFromISR( mutex->lock, &xHigherPriorityTaskWoken); + portEND_SWITCHING_ISR( xHigherPriorityTaskWoken ); + } else { +#endif + if (mutex->opts == MTX_DEF) { + xSemaphoreGive( mutex->lock ); + } +//{} } + } +} + +void mtx_lock(struct mtx *mutex) { +#if 0 //{} + if (xPortInIsrContext()) { + BaseType_t xHigherPriorityTaskWoken = pdFALSE; + xSemaphoreTakeFromISR( mutex->lock, &xHigherPriorityTaskWoken ); + portEND_SWITCHING_ISR( xHigherPriorityTaskWoken ); + } else { +#endif + if (mutex->opts == MTX_DEF) { + xSemaphoreTake( mutex->lock, portMAX_DELAY ); + } else if (mutex->opts == MTX_RECURSE) { + xSemaphoreTakeRecursive( mutex->lock, portMAX_DELAY ); + } +//{} } +} + +int mtx_trylock(struct mtx *mutex) { + if (mutex->opts == MTX_DEF) { + if (xSemaphoreTake( mutex->lock, 0 ) == pdTRUE) { + return 1; + } else { + return 0; + } + } else if (mutex->opts == MTX_RECURSE) { + if (xSemaphoreTakeRecursive( mutex->lock, 0 ) == pdTRUE) { + return 1; + } else { + return 0; + } + } + + return 0; +} + +void mtx_unlock(struct mtx *mutex) { +#if 0 //{} + if (xPortInIsrContext()) { + BaseType_t xHigherPriorityTaskWoken = pdFALSE; + xSemaphoreGiveFromISR( mutex->lock, &xHigherPriorityTaskWoken ); + portEND_SWITCHING_ISR( xHigherPriorityTaskWoken ); + } else { +#endif + if (mutex->opts == MTX_DEF) { + xSemaphoreGive( mutex->lock ); + } else if (mutex->opts == MTX_RECURSE) { + xSemaphoreGiveRecursive( mutex->lock ); + } +//{} } +} + +void mtx_destroy(struct mtx *mutex) { + if (!mutex->lock) return; + + if (mutex->opts == MTX_DEF) { +#if 0 //{} + if (xPortInIsrContext()) { + BaseType_t xHigherPriorityTaskWoken = pdFALSE; + xSemaphoreGiveFromISR( mutex->lock, &xHigherPriorityTaskWoken ); + portEND_SWITCHING_ISR( xHigherPriorityTaskWoken ); + } else { +#endif + xSemaphoreGive( mutex->lock ); +//{} } + + vSemaphoreDelete( mutex->lock ); + } else if (mutex->opts == MTX_RECURSE) { + vSemaphoreDelete( mutex->lock ); + } + + mutex->lock = 0; +} |