108 lines
5.7 KiB
C
108 lines
5.7 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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/** POSIX wrapper for THREADX */
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/** */
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/** */
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/** */
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/**************************************************************************/
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/**************************************************************************/
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/* Include necessary system files. */
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#include "tx_api.h" /* Threadx API */
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#include "pthread.h" /* Posix API */
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#include "px_int.h" /* Posix helper functions */
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/**************************************************************************/
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/* */
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/* FUNCTION RELEASE */
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/* */
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/* posix_in_thread_context PORTABLE C */
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/* 6.1.7 */
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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 determines if the system is currently in "thread" */
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/* context, i.e. not timer routine, not ISR, not idling. */
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/* */
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/* INPUT */
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/* */
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/* None */
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/* */
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/* OUTPUT */
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/* */
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/* TX_TRUE | TX_FALSE */
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/* */
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/* CALLS */
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/* */
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/* None */
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/* */
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/* CALLED BY */
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/* */
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/* posix internal 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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/* 06-02-2021 William E. Lamie Initial Version 6.1.7 */
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/* */
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/**************************************************************************/
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ULONG posix_in_thread_context(VOID)
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{
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/* External variables, defined within ThreadX, needed here. */
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extern TX_THREAD * _tx_thread_current_ptr;
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extern ULONG _tx_thread_system_state;
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#ifndef TX_TIMER_PROCESS_IN_ISR
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extern TX_THREAD _tx_timer_thread;
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#endif
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/* Return TX_FALSE if any of the following are true:
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- we are in the scheduling loop (not in a thread);
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- we are in an ISR
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- we are in a timer routine
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Return TX_TRUE otherwise (we are in a thread.)
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*/
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if (_tx_thread_system_state == TX_INITIALIZE_IN_PROGRESS)
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{
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/* We are calling from initialization, return TRUE. */
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return(TX_TRUE);
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}
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else if ((!_tx_thread_current_ptr) /* Not in a thread */
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|| (_tx_thread_system_state) /* In an ISR */
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#ifndef TX_TIMER_PROCESS_IN_ISR
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/* Timer routine */
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|| (_tx_thread_current_ptr == &_tx_timer_thread)
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#endif
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)
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{
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/* We are NOT in thread (thread) context. */
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return (TX_FALSE);
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}
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else
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{
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/* We ARE in thread (thread) context. */
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return (TX_TRUE);
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}
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}
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