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common_modules/module_manager/src/txm_module_manager_object_deallocate.c
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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 */
/** */
/** Module Manager */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
#include "tx_api.h"
#include "tx_thread.h"
#include "txm_module.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _txm_module_manager_object_deallocate PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Scott Larson, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function deallocates a previously allocated object. */
/* */
/* INPUT */
/* */
/* object_ptr Object pointer to deallocate */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _txe_mutex_get Get module instance mutex */
/* _txe_mutex_put Release module instance mutex */
/* _txe_byte_release Release object back to pool */
/* */
/* */
/* CALLED BY */
/* */
/* Application code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 09-30-2020 Scott Larson Initial Version 6.1 */
/* */
/**************************************************************************/
UINT _txm_module_manager_object_deallocate(VOID *object_ptr)
{
TXM_MODULE_INSTANCE *module_instance;
TXM_MODULE_ALLOCATED_OBJECT *module_allocated_object_ptr;
UINT return_value;
/* Get module manager protection mutex. */
_txe_mutex_get(&_txm_module_manager_mutex, TX_WAIT_FOREVER);
/* Determine if an object pool was created. */
if (_txm_module_manager_object_pool_created)
{
TXM_MODULE_ALLOCATED_OBJECT *next_object, *previous_object;
/* Pickup module instance pointer. */
module_instance = _tx_thread_current_ptr -> tx_thread_module_instance_ptr;
/* Setup the memory pointer. */
module_allocated_object_ptr = (TXM_MODULE_ALLOCATED_OBJECT *) object_ptr;
/* Position the object pointer backwards to position back to the module manager information. */
previous_object = module_allocated_object_ptr--;
/* Make sure the object is valid. */
if ((module_allocated_object_ptr == TX_NULL) || (module_allocated_object_ptr -> txm_module_allocated_object_module_instance != module_instance) || (module_instance -> txm_module_instance_object_list_count == 0))
{
/* Set return value to invalid pointer. */
return_value = TX_PTR_ERROR;
}
else
{
/* Unlink the node. */
if ((--module_instance -> txm_module_instance_object_list_count) == 0)
{
/* Only allocated object, just set the allocated list to NULL. */
module_instance -> txm_module_instance_object_list_head = TX_NULL;
}
else
{
/* Otherwise, not the only allocated object, link-up the neighbors. */
next_object = module_allocated_object_ptr -> txm_module_allocated_object_next;
previous_object = module_allocated_object_ptr -> txm_module_allocated_object_previous;
next_object -> txm_module_allocated_object_previous = previous_object;
previous_object -> txm_module_allocated_object_next = next_object;
/* See if we have to update the allocated object list head pointer. */
if (module_instance -> txm_module_instance_object_list_head == module_allocated_object_ptr)
{
/* Yes, move the head pointer to the next link. */
module_instance -> txm_module_instance_object_list_head = next_object;
}
}
/* Release the object memory. */
return_value = (ULONG) _txe_byte_release((VOID *) module_allocated_object_ptr);
}
}
else
{
/* Set return value to not enabled. */
return_value = TX_NOT_AVAILABLE;
}
/* Release the protection mutex. */
_txe_mutex_put(&_txm_module_manager_mutex);
return(return_value);
}