/**HEADER********************************************************************
* 
* Copyright (c) 2008 Freescale Semiconductor;
* All Rights Reserved
*
* Copyright (c) 2004-2008 Embedded Access Inc.;
* All Rights Reserved
*
* Copyright (c) 1989-2008 ARC International;
* All Rights Reserved
*
*************************************************************************** 
*
* THIS SOFTWARE IS PROVIDED BY FREESCALE "AS IS" AND ANY EXPRESSED 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 FREESCALE OR ITS 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.
*
**************************************************************************
*
* $FileName: mem_zsyf.c$
* $Version : 3.0.4.0$
* $Date    : Mar-5-2009$
*
* Comments:
*
*   This file contains the functions for returning a memory
*   block owned by the system.  The block is also zeroed out.
*
*END************************************************************************/

#define __MEMORY_MANAGER_COMPILE__
#include "mqx_inc.h"
#if MQX_USE_MEM
#include "mem_prv.h"

/*FUNCTION*------------------------------------------------------------
*
* Function Name   : _mem_alloc_system_zero_from
* Returned Value  : None
* Comments        : allocates memory from the specified pool and asigns
*    it to the system, zeroed.
*
*END*------------------------------------------------------------------*/

pointer _mem_alloc_system_zero_from
   (
      /* [IN] the pool to allocate from */
      _mem_pool_id pool_id,

      /* [IN] the size of the memory block */
      _mem_size    size

   )
{ /* Body */
   KERNEL_DATA_STRUCT_PTR  kernel_data;
   MEMPOOL_STRUCT_PTR      mem_pool_ptr;
   pointer                 result;
   _mqx_uint               error;

   _GET_KERNEL_DATA(kernel_data);
   _KLOGE2(KLOG_mem_alloc_system_zero_from, size);

   mem_pool_ptr = (MEMPOOL_STRUCT_PTR)pool_id;

   _INT_DISABLE();
   result = _mem_alloc_internal(size, SYSTEM_TD_PTR(kernel_data), mem_pool_ptr,
      &error);

   /* update the memory allocation pointer in case a lower priority
   ** task was preempted inside _mem_alloc_internal
   */
   mem_pool_ptr->POOL_ALLOC_CURRENT_BLOCK = mem_pool_ptr->POOL_FREE_LIST_PTR;

   _INT_ENABLE();
   
#if MQX_CHECK_ERRORS
   if (error != MQX_OK) {
      _task_set_error(error);
   } /* Endif */
#endif

   if (result != NULL) {
      _mem_zero(result, size);
   } /* Endif */

   _KLOGX3(KLOG_mem_alloc_system_zero_from, result, mem_pool_ptr->POOL_BLOCK_IN_ERROR);

   return(result);

} /* Endbody */

#endif
/* EOF */
