/* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

  *

  * Permission is hereby granted, free of charge, to any person obtaining a

  * copy of this software and/or associated documentation files (the

  * "Materials"), to deal in the Materials without restriction, including

  * without limitation the rights to use, copy, modify, merge, publish,

  * distribute, sublicense, and/or sell copies of the Materials, and to

  * permit persons to whom the Materials are furnished to do so, subject to

  * the following conditions:

  * 

  * The above copyright notice and this permission notice shall be included

  * in all copies or substantial portions of the Materials.

  * 

  * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

  * MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.

  */

 #include <errno.h>

 #include <time.h>

 #include <semaphore.h>

 #include <stdlib.h>

 #include "owfsemaphore.h"

 #include "owfmemory.h"

 #define SEM(x)          (sem_t*)(*x)

 OWF_API_CALL OWFint

 OWF_Semaphore_Init(OWF_SEMAPHORE* sem, OWFint val)

 {

     *sem = xalloc(1, sizeof(sem_t));

     if (!*sem) {

         return ENOMEM;

     }

     return sem_init(SEM(sem), 0, val);

 }

 OWF_API_CALL OWFint

 OWF_Semaphore_Wait(OWF_SEMAPHORE* sem)

 {

     if (!*sem) {

         return EINVAL;

     }

     return sem_wait(SEM(sem));

 }

 OWF_API_CALL OWFint

 OWF_Semaphore_TryWait(OWF_SEMAPHORE* sem)

 {

     if (!*sem) {

         return EINVAL;

     }

     return sem_trywait(SEM(sem));

 }

 OWF_API_CALL void

 OWF_Semaphore_Post(OWF_SEMAPHORE* sem)

 {

     if (!*sem) {

         return;

     }

     sem_post(SEM(sem));

 }

 OWF_API_CALL OWFint

 OWF_Semaphore_GetValue(OWF_SEMAPHORE* sem, OWFint* val)

 {

     if (!*sem) {

         return EINVAL;

     }

     return sem_getvalue(SEM(sem), (int *)val);

 }

 OWF_API_CALL OWFint

 OWF_Semaphore_Destroy(OWF_SEMAPHORE* sem)

 {

     OWFint             err = EINVAL;

     if (*sem) {

         err = sem_destroy(SEM(sem));

         xfree(*sem);

         *sem = NULL;

     }

     return err;

 }