/* Copyright 2008, 2009 Mariano Cerdeiro
 * Copyright 2014, ACSE & CADIEEL
 *      ACSE: http://www.sase.com.ar/asociacion-civil-sistemas-embebidos/ciaa/
 *      CADIEEL: http://www.cadieel.org.ar
 *
 * This file is part of CIAA Firmware.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. Neither the name of the copyright holder 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 HOLDER 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.
 *
 */

/** \brief FreeOSEK Os ReleaseResource Implementation File
 **
 ** This file implements the ReleaseResource API
 **
 ** \file ReleaseResource.c
 **
 **/

/** \addtogroup FreeOSEK
 ** @{ */
/** \addtogroup FreeOSEK_Os
 ** @{ */
/** \addtogroup FreeOSEK_Os_Global
 ** @{ */

/*
 * Initials     Name
 * ---------------------------
 * MaCe         Mariano Cerdeiro
 * KLi          Kang Li
 */

/*
 * modification history (new versions first)
 * -----------------------------------------------------------
 * 20090414 v0.1.7 MaCe fix optmization for NO_RES_SCHEDULER
 * 20090414 v0.1.6 MaCe bugfix NON_PREEMPTIVE == OSEK_DISABLE and not OSEK_ENABLE
 * 20090331 v0.1.5 MaCe add support to NO_RES_SCHEDULER
 * 20090330 v0.1.5 MaCe correct errors done in v0.1.3
 * 20090330 v0.1.4 MaCe add support to NON_PREEMPTIVE systems and add non
 *                      preemptive check
 * 20090329 v0.1.3 MaCe add RES_SCHEDULER and imp. code if RESOURCE_COUNT is
 *                      different than 0
 * 20090130 v0.1.2 MaCe add OSEK_MEMMAP check
 * 20081113 v0.1.1 KLi  Added memory layout attribute macros
 * 20080909 v0.1.0 MaCe initial version
 */

/*==================[inclusions]=============================================*/
#include "Os_Internal.h"

/*==================[macros and definitions]=================================*/

/*==================[internal data declaration]==============================*/

/*==================[internal functions declaration]=========================*/

/*==================[internal data definition]===============================*/

/*==================[external data definition]===============================*/

/*==================[internal functions definition]==========================*/

/*==================[external functions definition]==========================*/
/* only compile this function if RESOURCE_COUNT != 0 or if RES_SCHEDULER is
 * used */
#if ( (NO_RES_SCHEDULER == OSEK_DISABLE) || (RESOURCES_COUNT != 0) )
StatusType ReleaseResource
(
   ResourceType ResID
)
{
   /* \req OSEK_SYS_3.13 The system service StatusType
    * ReleaseResource ( ResourceType ResID ) shall be defined */

   /* \req OSEK_SYS_3.14.2: Possible return values in Standard mode is
    * E_OK  */
   StatusType ret = E_OK;

#if (RESOURCES_COUNT != 0)
   uint8 loopi;
#endif /* #if (RESOURCES_COUNT != 0) */

   /* asign the static priority to the task */
   TaskPriorityType priority = TasksConst[GetRunningTask()].StaticPriority;

#if (ERROR_CHECKING_TYPE == ERROR_CHECKING_EXTENDED)
   if (
/* only if one or more resources were defined */
#if (RESOURCES_COUNT != 0)
        ( ResID > RESOURCES_COUNT )
#endif /* #if (RESOURCES_COUNT != 0) */
#if ( (RESOURCES_COUNT != 0) && (NO_RES_SCHEDULER == OSEK_DISABLE) )
            &&
#endif /* #if ( (RESOURCES_COUNT != 0) && (NO_RES_SCHEDULER == OSEK_DISABLE) ) */
/* check RES_SCHEDULER only if used */
#if (NO_RES_SCHEDULER == OSEK_DISABLE)
        ( ResID != RES_SCHEDULER )
#endif /* #if (NO_RES_SCHEDULER == OSEK_DISABLE) */
      )
   {
      /* \req OSEK_SYS_3.14.3-1/2 Extra possible return values in Extended mode are
       * E_OS_ID, E_OS_NOFUNC, E_OS_ACCESS */
      ret = E_OS_ID;
   }
   else
#if (NO_RES_SCHEDULER == OSEK_DISABLE)
      if ( ResID != RES_SCHEDULER )
#endif /* #if (NO_RES_SCHEDULER == OSEK_DISABLE) */
   {
      if ( ( TasksVar[GetRunningTask()].Resources & ( 1 << ResID ) ) == 0 )
      {
         /* \req OSEK_SYS_3.14.3-2/2 Extra possible return values in Extended mode are
          ** E_OS_ID, E_OS_NOFUNC, E_OS_ACCESS */
         ret = E_OS_NOFUNC;
      }
   }
#if (NO_RES_SCHEDULER == OSEK_DISABLE)
   else
   {
      /* nothing to do */
   }
#endif /* #if (NO_RES_SCHEDULER == OSEK_DISABLE) */

   if ( ret == E_OK )
#endif /* #if (ERROR_CHECKING_TYPE == ERROR_CHECKING_EXTENDED) */
   {
      IntSecure_Start();

#if (RESOURCES_COUNT != 0)
#if (NO_RES_SCHEDULER == OSEK_DISABLE)
      if ( ResID != RES_SCHEDULER )
#endif /* #if (NO_RES_SCHEDULER == OSEK_DISABLE) */
      {
         /* clear resource */
         TasksVar[GetRunningTask()].Resources &= ~( 1 << ResID );
      }

      for (loopi = 0; loopi < RESOURCES_COUNT; loopi++)
      {
         if ( TasksVar[GetRunningTask()].Resources & ( 1 << loopi ) )
         {
            if ( priority < ResourcesPriority[loopi] )
            {
               priority = ResourcesPriority[loopi];
            }
         }
      }
#endif /* #if (RESOURCES_COUNT != 0) */

      /* \req OSEK_SYS_3.14.1 ReleaseResource is the counterpart of GetResource
       * and serves to leave critical sections in the code that are assigned to
       * the resource referenced by ResID */
      TasksVar[GetRunningTask()].ActualPriority = priority;

      IntSecure_End();

#if (NON_PREEMPTIVE == OSEK_DISABLE)
      /* check if called from a Task Context */
      if ( GetCallingContext() ==  CONTEXT_TASK )
      {
         if ( ( TasksConst[GetRunningTask()].ConstFlags.Preemtive ) &&
              ( ret == E_OK ) )
         {
            /* \req OSEK_SYS_3.14.4 Rescheduling shall take place only if called from a
             * preemptable task. */
            (void)Schedule();
         }
      }
#endif /* #if (NON_PREEMPTIVE == OSEK_DISABLE) */

   }

#if ( (ERROR_CHECKING_TYPE == ERROR_CHECKING_EXTENDED) && \
      (HOOK_ERRORHOOK == OSEK_ENABLE) )
   /* \req OSEK_ERR_1.3-7/xx The ErrorHook hook routine shall be called if a
    * system service returns a StatusType value not equal to E_OK.*/
   /* \req OSEK_ERR_1.3.1-7/xx The hook routine ErrorHook is not called if a
    * system service is called from the ErrorHook itself. */
   if ( ( ret != E_OK ) && (ErrorHookRunning != 1))
   {
      SetError_Api(OSServiceId_ReleaseResource);
      SetError_Param1(ResID);
      SetError_Ret(ret);
      SetError_Msg("ReleaseResource returns != E_OK");
      SetError_ErrorHook();
   }
#endif

   return ret;
}
#endif /* #if ( (NO_RES_SCHEDULER == OSEK_DISABLE) || (RESOURCES_COUNT != 0) ) */

/** @} doxygen end group definition */
/** @} doxygen end group definition */
/** @} doxygen end group definition */
/*==================[end of file]============================================*/

