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PProvost
2020-05-11 08:55:07 -06:00
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common/src/txe_block_release.c Normal file
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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** ThreadX Component */
/** */
/** Block Pool */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
/* Include necessary system files. */
#include "tx_api.h"
#include "tx_block_pool.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _txe_block_release PORTABLE C */
/* 6.0 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks for errors in the block release function call. */
/* */
/* INPUT */
/* */
/* block_ptr Pointer to memory block */
/* */
/* OUTPUT */
/* */
/* TX_PTR_ERROR Invalid memory block pointer */
/* status Actual completion status */
/* */
/* CALLS */
/* */
/* _tx_block_release Actual block release function */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* */
/**************************************************************************/
UINT _txe_block_release(VOID *block_ptr)
{
UINT status;
TX_BLOCK_POOL *pool_ptr;
UCHAR **indirect_ptr;
UCHAR *work_ptr;
/* First check the supplied pointer. */
if (block_ptr == TX_NULL)
{
/* The block pointer is invalid, return appropriate status. */
status = TX_PTR_ERROR;
}
else
{
/* Pickup the pool pointer which is just previous to the starting
address of block that the caller sees. */
work_ptr = TX_VOID_TO_UCHAR_POINTER_CONVERT(block_ptr);
work_ptr = TX_UCHAR_POINTER_SUB(work_ptr, (sizeof(UCHAR *)));
indirect_ptr = TX_UCHAR_TO_INDIRECT_UCHAR_POINTER_CONVERT(work_ptr);
work_ptr = *indirect_ptr;
pool_ptr = TX_UCHAR_TO_BLOCK_POOL_POINTER_CONVERT(work_ptr);
/* Check for an invalid pool pointer. */
if (pool_ptr == TX_NULL)
{
/* Pool pointer is invalid, return appropriate error code. */
status = TX_PTR_ERROR;
}
/* Now check for invalid pool ID. */
else if (pool_ptr -> tx_block_pool_id != TX_BLOCK_POOL_ID)
{
/* Pool pointer is invalid, return appropriate error code. */
status = TX_PTR_ERROR;
}
else
{
/* Call actual block release function. */
status = _tx_block_release(block_ptr);
}
}
/* Return completion status. */
return(status);
}