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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
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** POSIX wrapper for THREADX */
/** */
/** */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#include "tx_api.h" /* Threadx API */
#include "pthread.h" /* Posix API */
#include "px_int.h" /* Posix helper functions */
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* posix_in_thread_context PORTABLE C */
/* 6.1.7 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function determines if the system is currently in "thread" */
/* context, i.e. not timer routine, not ISR, not idling. */
/* */
/* INPUT */
/* */
/* None */
/* */
/* OUTPUT */
/* */
/* TX_TRUE | TX_FALSE */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* posix internal code */
/* */
/**************************************************************************/
ULONG posix_in_thread_context(VOID)
{
/* External variables, defined within ThreadX, needed here. */
extern TX_THREAD * _tx_thread_current_ptr;
extern ULONG _tx_thread_system_state;
#ifndef TX_TIMER_PROCESS_IN_ISR
extern TX_THREAD _tx_timer_thread;
#endif
/* Return TX_FALSE if any of the following are true:
- we are in the scheduling loop (not in a thread);
- we are in an ISR
- we are in a timer routine
Return TX_TRUE otherwise (we are in a thread.)
*/
if (_tx_thread_system_state == TX_INITIALIZE_IN_PROGRESS)
{
/* We are calling from initialization, return TRUE. */
return(TX_TRUE);
}
else if ((!_tx_thread_current_ptr) /* Not in a thread */
|| (_tx_thread_system_state) /* In an ISR */
#ifndef TX_TIMER_PROCESS_IN_ISR
/* Timer routine */
|| (_tx_thread_current_ptr == &_tx_timer_thread)
#endif
)
{
/* We are NOT in thread (thread) context. */
return (TX_FALSE);
}
else
{
/* We ARE in thread (thread) context. */
return (TX_TRUE);
}
}
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