heap_3.c

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/*
    FreeRTOS V7.5.3 - Copyright (C) 2013 Real Time Engineers Ltd. 
    All rights reserved

    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

    ***************************************************************************
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    ***************************************************************************

    This file is part of the FreeRTOS distribution.

    FreeRTOS is free software; you can redistribute it and/or modify it under
    the terms of the GNU General Public License (version 2) as published by the
    Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.

    >>! NOTE: The modification to the GPL is included to allow you to distribute
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    ***************************************************************************
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*/


/*
 * Implementation of pvPortMalloc() and vPortFree() that relies on the
 * compilers own malloc() and free() implementations.
 *
 * This file can only be used if the linker is configured to to generate
 * a heap memory area.
 *
 * See heap_1.c, heap_2.c and heap_4.c for alternative implementations, and the 
 * memory management pages of http://www.FreeRTOS.org for more information.
 */

#include <stdlib.h>

/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
all the API functions to use the MPU wrappers.  That should only be done when
task.h is included from an application file. */
#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE

#include "FreeRTOS.h"
#include "task.h"

#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE

/*-----------------------------------------------------------*/

void *pvPortMalloc( size_t xWantedSize )
{
void *pvReturn;

    vTaskSuspendAll();
    {
        pvReturn = malloc( xWantedSize );
        traceMALLOC( pvReturn, xWantedSize );
    }
    xTaskResumeAll();

    #if( configUSE_MALLOC_FAILED_HOOK == 1 )
    {
        if( pvReturn == NULL )
        {
            extern void vApplicationMallocFailedHook( void );
            vApplicationMallocFailedHook();
        }
    }
    #endif
    
    return pvReturn;
}
/*-----------------------------------------------------------*/

void vPortFree( void *pv )
{
    if( pv )
    {
        vTaskSuspendAll();
        {
            free( pv );
            traceFREE( pv, 0 );
        }
        xTaskResumeAll();
    }
}