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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** ThreadX Component */
/** */
/** Block Pool */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
/* Include necessary system files. */
#include "tx_api.h"
#include "tx_thread.h"
#include "tx_timer.h"
#include "tx_block_pool.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _txe_block_allocate PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks for errors in the allocate block memory */
/* function call. */
/* */
/* INPUT */
/* */
/* pool_ptr Pointer to pool control block */
/* block_ptr Pointer to place allocated block */
/* pointer */
/* wait_option Suspension option */
/* */
/* OUTPUT */
/* */
/* TX_POOL_ERROR Invalid pool pointer */
/* TX_PTR_ERROR Invalid destination pointer */
/* TX_WAIT_ERROR Invalid wait option */
/* status Actual Completion status */
/* */
/* CALLS */
/* */
/* _tx_block_allocate Actual block allocate function */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
UINT _txe_block_allocate(TX_BLOCK_POOL *pool_ptr, VOID **block_ptr, ULONG wait_option)
{
UINT status;
#ifndef TX_TIMER_PROCESS_IN_ISR
TX_THREAD *current_thread;
#endif
/* Default status to success. */
status = TX_SUCCESS;
/* Check for an invalid pool pointer. */
if (pool_ptr == TX_NULL)
{
/* Pool pointer is invalid, return appropriate error code. */
status = TX_POOL_ERROR;
}
/* Check for an invalid pool pointer. */
else if (pool_ptr -> tx_block_pool_id != TX_BLOCK_POOL_ID)
{
/* Pool pointer is invalid, return appropriate error code. */
status = TX_POOL_ERROR;
}
/* Check for an invalid destination for return pointer. */
else if (block_ptr == TX_NULL)
{
/* Null destination pointer, return appropriate error. */
status = TX_PTR_ERROR;
}
else
{
/* Check for a wait option error. Only threads are allowed any form of
suspension. */
if (wait_option != TX_NO_WAIT)
{
/* Is the call from an 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
else
{
/* Pickup thread pointer. */
TX_THREAD_GET_CURRENT(current_thread)
/* Is the current thread the timer thread? */
if (current_thread == &_tx_timer_thread)
{
/* A non-thread is trying to suspend, return appropriate error code. */
status = TX_WAIT_ERROR;
}
}
#endif
}
}
/* Determine if everything is okay. */
if (status == TX_SUCCESS)
{
/* Call actual block allocate function. */
status = _tx_block_allocate(pool_ptr, block_ptr, wait_option);
}
/* Return completion status. */
return(status);
}
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