mirror of
https://github.com/eclipse-threadx/threadx.git
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88 lines
4.6 KiB
C
88 lines
4.6 KiB
C
/***************************************************************************
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* Copyright (c) 2024 Microsoft Corporation
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*
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* This program and the accompanying materials are made available under the
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* terms of the MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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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 "tx_posix.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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/* sched_yield 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 routine forces the running thread to relinquish the CPU */
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/* */
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/* INPUT */
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/* */
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/* void . */
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/* */
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/* OUTPUT */
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/* */
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/* OK If successful */
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/* ERROR IF fails */
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/* */
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/* CALLS */
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/* */
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/* posix_in_thread_context Checks thread is called from its context.*/
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/* tx_thread_relinquish Relinquishes processor control */
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/* posix_internal_error Returns generic error */
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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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/* 06-02-2021 William E. Lamie Initial Version 6.1.7 */
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/* */
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/**************************************************************************/
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INT sched_yield(VOID)
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{
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/* Make sure we're calling this routine from a thread context. */
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if (!posix_in_thread_context())
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{
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/* return POSIX error. */
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posix_internal_error(444);
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/* return error. */
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return (ERROR);
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}
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/* This relinquishes the CPU. */
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tx_thread_relinquish();
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return(OK);
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}
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