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