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common_modules/module_manager/src/txm_module_manager_object_allocate.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 "txm_module.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _txm_module_manager_object_allocate PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Scott Larson, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function allocates memory for an object from the memory pool */
/* supplied to txm_module_manager_initialize. */
/* */
/* INPUT */
/* */
/* object_ptr Destination of object pointer on */
/* successful allocation */
/* object_size Size in bytes of the object to be */
/* allocated */
/* module_instance The module instance that the */
/* object belongs to */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _txe_mutex_get Get module instance mutex */
/* _txe_mutex_put Release module instance mutex */
/* _txe_byte_allocate Allocate object from pool */
/* */
/* CALLED BY */
/* */
/* Application code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 09-30-2020 Scott Larson Initial Version 6.1 */
/* */
/**************************************************************************/
UINT _txm_module_manager_object_allocate(VOID **object_ptr_ptr, ULONG object_size, TXM_MODULE_INSTANCE *module_instance)
{
TXM_MODULE_ALLOCATED_OBJECT *object_ptr;
UINT return_value;
/* Ensure the object pointer pointer is valid. */
if (object_ptr_ptr == (VOID **) TX_NULL)
{
/* The object pointer pointer is invalid, return an error. */
return(TXM_MODULE_INVALID_MEMORY);
}
/* Initialize the return pointer to NULL. */
*((VOID **) object_ptr_ptr) = TX_NULL;
/* 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;
/* Allocate the object requested by the module - adding an extra ULONG in order to
store the module instance pointer. */
return_value = (ULONG) _txe_byte_allocate(&_txm_module_manager_object_pool, (VOID **) &object_ptr,
(ULONG) (object_size + sizeof(TXM_MODULE_ALLOCATED_OBJECT)), TX_NO_WAIT);
/* Determine if the request was successful. */
if (return_value == TX_SUCCESS)
{
/* Yes, now store the module instance in the allocated memory block. */
/* Link the allocated memory to the module instance. */
if (module_instance -> txm_module_instance_object_list_count++ == 0)
{
/* The allocated object list is empty. Add object to empty list. */
module_instance -> txm_module_instance_object_list_head = object_ptr;
object_ptr -> txm_module_allocated_object_next = object_ptr;
object_ptr -> txm_module_allocated_object_previous = object_ptr;
}
else
{
/* This list is not NULL, add to the end of the list. */
next_object = module_instance -> txm_module_instance_object_list_head;
previous_object = next_object -> txm_module_allocated_object_previous;
/* Place the new object in the list. */
next_object -> txm_module_allocated_object_previous = object_ptr;
previous_object -> txm_module_allocated_object_next = object_ptr;
/* Setup this object's allocated links. */
object_ptr -> txm_module_allocated_object_previous = previous_object;
object_ptr -> txm_module_allocated_object_next = next_object;
}
/* Setup the module instance pointer in the allocated object. */
object_ptr -> txm_module_allocated_object_module_instance = module_instance;
/* Set the object size. */
object_ptr -> txm_module_object_size = object_size;
/* Move the object pointer forward. This is what the module is given. */
object_ptr++;
/* Return this pointer to the application. */
*((VOID **) object_ptr_ptr) = 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);
}