utility/rtos_compatibility_layers/posix/px_memory_release.c


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/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 * Copyright (c) 2026-present Eclipse ThreadX contributors
 *
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** POSIX wrapper for THREADX                                             */
/**                                                                       */
/**                                                                       */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/

/* Include necessary system files.  */

#include "tx_api.h"    /* Threadx API */
#include "pthread.h"  /* Posix API */
#include "px_int.h"    /* Posix helper functions */


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    posix_memory_release                                PORTABLE C      */
/*                                                           6.1.7        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    William E. Lamie, Microsoft Corporation                             */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function attempts to return the specified memory region back   */
/*    into the POSIX heap.                                                */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    memory_ptr                            Memory pointer to return      */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    tx_byte_release                       Release the memory            */
/*    posix_internal_error                  internal error handler        */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    POSIX internal code                                                 */
/*                                                                        */
/**************************************************************************/
VOID posix_memory_release(VOID * memory_ptr)
{

    /* Check if memory_ptr is part of the POSIX byte pool,
     * if not just return  */
    if (((CHAR *)memory_ptr >=
                (CHAR *)&posix_heap_byte_pool.tx_byte_pool_start)  ||
        ((CHAR *)memory_ptr <=
                (CHAR *)posix_heap_byte_pool.tx_byte_pool_start
                      + posix_heap_byte_pool.tx_byte_pool_size)) {
      tx_byte_release(memory_ptr);
    }

    /* Return to caller.  */
    return;
}