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/*
* Copyright (c) 2013-2015, Texas Instruments Incorporated
* 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 Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 THE COPYRIGHT OWNER OR
* CONTRIBUTORS 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.
*/
/*
* ======== GateMutex.c ========
*/
/* Standard headers */
#include <ti/ipc/Std.h>
/* Linux headers */
#include <stdlib.h>
#include <pthread.h>
#include <string.h>
#include <assert.h>
#include <IGateProvider.h>
/*
* TODO: does this belong in ti/ipc/Std.h? We should consider getting rid of
* error blocks from the GateMutex.h interface.
*/
typedef UInt32 Error_Block;
#include <GateMutex.h>
#if defined (__cplusplus)
extern "C" {
#endif
/* -----------------------------------------------------------------------------
* Structs & Enums
* -----------------------------------------------------------------------------
*/
struct GateMutex_Object {
IGateProvider_SuperObject; /* For inheritance from IGateProvider */
pthread_mutex_t mutex; /* Mutex lock */
};
/* -----------------------------------------------------------------------------
* Forward declarations
* -----------------------------------------------------------------------------
*/
IArg GateMutex_enter(GateMutex_Handle gmhandle);
Void GateMutex_leave(GateMutex_Handle gmhandle, IArg key);
/* -----------------------------------------------------------------------------
* APIs
* -----------------------------------------------------------------------------
*/
GateMutex_Handle GateMutex_create(const GateMutex_Params * params,
Error_Block *eb)
{
pthread_mutexattr_t attr;
GateMutex_Object * obj = (GateMutex_Object *)calloc(1,
sizeof(GateMutex_Object));
if (obj == NULL) {
return NULL;
}
memset(obj, 0, sizeof(GateMutex_Object));
IGateProvider_ObjectInitializer(obj, GateMutex);
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&(obj->mutex), &attr);
return (GateMutex_Handle)obj;
}
Int GateMutex_delete(GateMutex_Handle * handle)
{
GateMutex_Object * obj = (GateMutex_Object *)*handle;
if (handle == NULL) {
return GateMutex_E_INVALIDARG;
}
if (*handle == NULL) {
return GateMutex_E_INVALIDARG;
}
pthread_mutex_destroy(&(obj->mutex));
free(*handle);
*handle = NULL;
return GateMutex_S_SUCCESS;
}
IArg GateMutex_enter (GateMutex_Handle gmHandle)
{
GateMutex_Object * obj = (GateMutex_Object *)gmHandle;
int ret;
ret = pthread_mutex_lock(&(obj->mutex));
assert(ret == 0);
return (IArg)ret;
}
Void GateMutex_leave (GateMutex_Handle gmHandle, IArg key)
{
GateMutex_Object * obj = (GateMutex_Object *)gmHandle;
int ret;
ret = pthread_mutex_unlock(&(obj->mutex));
assert(ret == 0);
}
#if defined (__cplusplus)
}
#endif /* defined (__cplusplus) */
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