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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 */
/** */
/** Byte Memory */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
/* Include necessary system files. */
#include "tx_api.h"
#include "tx_initialize.h"
#include "tx_thread.h"
#include "tx_timer.h"
#include "tx_byte_pool.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _txe_byte_allocate PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks for errors in allocate bytes function call. */
/* */
/* INPUT */
/* */
/* pool_ptr Pointer to pool control block */
/* memory_ptr Pointer to place allocated bytes */
/* pointer */
/* memory_size Number of bytes to allocate */
/* wait_option Suspension option */
/* */
/* OUTPUT */
/* */
/* TX_POOL_ERROR Invalid memory pool pointer */
/* TX_PTR_ERROR Invalid destination pointer */
/* TX_WAIT_ERROR Invalid wait option */
/* TX_CALLER_ERROR Invalid caller of this function */
/* TX_SIZE_ERROR Invalid size of memory request */
/* status Actual completion status */
/* */
/* CALLS */
/* */
/* _tx_byte_allocate Actual byte allocate function */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* 09-30-2020 Yuxin Zhou Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _txe_byte_allocate(TX_BYTE_POOL *pool_ptr, VOID **memory_ptr,
ULONG memory_size, ULONG wait_option)
{
UINT status;
#ifndef TX_TIMER_PROCESS_IN_ISR
TX_THREAD *thread_ptr;
#endif
/* Default status to success. */
status = TX_SUCCESS;
/* Check for an invalid byte pool pointer. */
if (pool_ptr == TX_NULL)
{
/* Byte pool pointer is invalid, return appropriate error code. */
status = TX_POOL_ERROR;
}
/* Now check for invalid pool ID. */
else if (pool_ptr -> tx_byte_pool_id != TX_BYTE_POOL_ID)
{
/* Byte pool pointer is invalid, return appropriate error code. */
status = TX_POOL_ERROR;
}
/* Check for an invalid destination for return pointer. */
else if (memory_ptr == TX_NULL)
{
/* Null destination pointer, return appropriate error. */
status = TX_PTR_ERROR;
}
/* Check for an invalid memory size. */
else if (memory_size == ((ULONG) 0))
{
/* Error in size, return appropriate error. */
status = TX_SIZE_ERROR;
}
/* Determine if the size is greater than the pool size. */
else if (memory_size > pool_ptr -> tx_byte_pool_size)
{
/* Error in size, return appropriate error. */
status = TX_SIZE_ERROR;
}
else
{
/* Check for a wait option error. Only threads are allowed any form of
suspension. */
if (wait_option != TX_NO_WAIT)
{
/* Is call from ISR or Initialization? */
if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0))
{
/* A non-thread is trying to suspend, return appropriate error code. */
status = TX_WAIT_ERROR;
}
}
}
#ifndef TX_TIMER_PROCESS_IN_ISR
/* Check for timer execution. */
if (status == TX_SUCCESS)
{
/* Pickup thread pointer. */
TX_THREAD_GET_CURRENT(thread_ptr)
/* Check for invalid caller of this function. First check for a calling thread. */
if (thread_ptr == &_tx_timer_thread)
{
/* Invalid caller of this function, return appropriate error code. */
status = TX_CALLER_ERROR;
}
}
#endif
/* Is everything still okay? */
if (status == TX_SUCCESS)
{
/* Check for interrupt call. */
if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0))
{
/* Now, make sure the call is from an interrupt and not initialization. */
if (TX_THREAD_GET_SYSTEM_STATE() < TX_INITIALIZE_IN_PROGRESS)
{
/* Invalid caller of this function, return appropriate error code. */
status = TX_CALLER_ERROR;
}
}
}
/* Determine if everything is okay. */
if (status == TX_SUCCESS)
{
/* Call actual byte memory allocate function. */
status = _tx_byte_allocate(pool_ptr, memory_ptr, memory_size, wait_option);
}
/* Return completion status. */
return(status);
}