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258 lines
13 KiB
258 lines
13 KiB
/******************************************************************************
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*
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* Copyright (C) 2018 The Android Open Source Project
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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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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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/*****************************************************************************/
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/* */
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/* File Name : osal_mutex.c */
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/* */
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/* Description : This file contains all the necessary function */
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/* definitions required to operate on mutex */
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/* */
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/* List of Functions : osal_get_mutex_handle_size */
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/* osal_mutex_create */
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/* osal_mutex_destroy */
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/* osal_mutex_lock */
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/* osal_mutex_lock_timed */
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/* osal_mutex_unlock */
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/* */
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/* Issues / Problems : None */
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/* */
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/* Revision History : */
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/* */
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/* DD MM YYYY Author(s) Changes (Describe the changes made) */
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/* 20 03 2006 Ittiam Draft */
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/* */
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/*****************************************************************************/
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/*****************************************************************************/
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/* File Includes */
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/*****************************************************************************/
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/* System include files */
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#include <stdio.h>
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#include <errno.h>
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#include <semaphore.h>
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#include <pthread.h>
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#include <time.h>
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/* User include files */
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#include "cast_types.h"
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#include "osal.h"
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#include "osal_handle.h"
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#include "osal_mutex.h"
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/*****************************************************************************/
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/* */
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/* Function Name : osal_mutex_create */
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/* */
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/* Description : This function creates the mutex and returns the handle */
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/* to the user. */
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/* */
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/* Inputs : OSAL handle */
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/* Pointer to Memory manager handle */
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/* */
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/* Globals : None */
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/* */
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/* Processing : Allocates memory for Mutex handle and calls OS specific */
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/* mutex create API call. */
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/* */
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/* Outputs : Mutex handle */
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/* */
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/* Returns : On SUCCESS - Mutex handle */
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/* On FAILURE - NULL */
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/* */
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/* Issues : None */
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/* */
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/* Revision History: */
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/* */
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/* DD MM YYYY Author(s) Changes (Describe the changes made) */
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/* 20 03 2006 Ittiam Draft */
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/* */
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/*****************************************************************************/
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void *osal_mutex_create(IN void *osal_handle)
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{
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void *mmr_handle = 0;
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/* Currenlty naming semaphores is not supported */
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{
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osal_t *handle = osal_handle;
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mutex_handle_t *mutex_handle = 0;
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if(0 == handle || 0 == handle->alloc || 0 == handle->free)
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return 0;
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/* Initialize MMR handle */
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mmr_handle = handle->mmr_handle;
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/* Allocate memory for the Handle */
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mutex_handle = handle->alloc(mmr_handle, sizeof(mutex_handle_t));
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/* Error in memory allocation */
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if(0 == mutex_handle)
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return 0;
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mutex_handle->mmr_handle = mmr_handle;
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mutex_handle->hdl = handle;
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/* Create semaphore */
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if(0 != pthread_mutex_init(&(mutex_handle->mutex_handle), NULL))
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{
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handle->free(mmr_handle, mutex_handle);
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return 0;
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}
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return mutex_handle;
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}
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}
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/*****************************************************************************/
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/* */
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/* Function Name : osal_mutex_destroy */
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/* */
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/* Description : This function destroys the mutex. */
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/* */
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/* Inputs : Mutex Handle */
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/* */
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/* Globals : None */
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/* */
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/* Processing : This function destroys the mutex refernced by the handle */
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/* and frees the memory held by the handle. */
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/* */
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/* Outputs : Status of mutex destroy */
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/* */
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/* Returns : On SUCCESS - 0 */
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/* On FAILURE - -1 */
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/* */
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/* Issues : None */
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/* */
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/* Revision History: */
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/* */
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/* DD MM YYYY Author(s) Changes (Describe the changes made) */
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/* 22 03 2006 Ittiam Draft */
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/* */
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/*****************************************************************************/
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WORD32 osal_mutex_destroy(IN void *mutex_handle)
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{
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if(0 == mutex_handle)
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return OSAL_ERROR;
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{
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mutex_handle_t *handle = (mutex_handle_t *)mutex_handle;
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WORD32 status = 0;
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if(0 == handle->hdl || 0 == handle->hdl->free)
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return OSAL_ERROR;
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/* Destroy the mutex */
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status = pthread_mutex_destroy(&(handle->mutex_handle));
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if(0 != status)
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return OSAL_ERROR;
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/* Free the handle */
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handle->hdl->free(handle->mmr_handle, handle);
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return OSAL_SUCCESS;
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}
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}
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/*****************************************************************************/
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/* */
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/* Function Name : osal_mutex_lock */
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/* */
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/* Description : This function locks the mutex. */
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/* */
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/* Inputs : Mutex handle */
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/* */
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/* Globals : None */
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/* */
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/* Processing : Calls OS specific mutex lock API. */
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/* */
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/* Outputs : Status of mutex lock */
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/* */
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/* Returns : On SUCCESS - 0 */
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/* On FAILURE - -1 */
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/* */
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/* Issues : None */
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/* */
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/* Revision History: */
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/* */
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/* DD MM YYYY Author(s) Changes (Describe the changes made) */
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/* 22 03 2006 Ittiam Draft */
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/* */
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/*****************************************************************************/
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WORD32 osal_mutex_lock(IN void *mutex_handle)
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{
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if(0 == mutex_handle)
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return OSAL_ERROR;
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{
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mutex_handle_t *handle = (mutex_handle_t *)mutex_handle;
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/* Wait on mutex lock */
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return pthread_mutex_lock(&(handle->mutex_handle));
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}
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}
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/*****************************************************************************/
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/* */
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/* Function Name : osal_mutex_unlock */
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/* */
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/* Description : This function unlocks the mutex */
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/* */
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/* Inputs : Mutex handle */
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/* */
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/* Globals : None */
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/* */
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/* Processing : Calls OS specific unlock mutex API. */
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/* */
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/* Outputs : Status of mutex unlock */
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/* */
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/* Returns : On SUCCESS - 0 */
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/* On FAILURE - -1 */
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/* */
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/* Issues : None */
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/* */
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/* Revision History: */
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/* */
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/* DD MM YYYY Author(s) Changes (Describe the changes made) */
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/* 22 03 2006 Ittiam Draft */
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/* */
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/*****************************************************************************/
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WORD32 osal_mutex_unlock(IN void *mutex_handle)
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{
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if(0 == mutex_handle)
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return OSAL_ERROR;
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{
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mutex_handle_t *handle = (mutex_handle_t *)mutex_handle;
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/* Release the lock */
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if(0 == pthread_mutex_unlock(&(handle->mutex_handle)))
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return OSAL_SUCCESS;
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return OSAL_ERROR;
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}
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}
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