mirror of
https://github.com/eclipse-threadx/threadx.git
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103 lines
4.9 KiB
C
103 lines
4.9 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 "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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/* sem_post 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 releases/puts back a semaphore token. */
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/* */
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/* INPUT */
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/* */
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/* sem semaphore descriptor */
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/* */
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/* OUTPUT */
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/* */
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/* temp1 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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/* tx_semaphore_put ThreadX Semaphore put */
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/* posix_internal_error Internal posix 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 sem_post(sem_t * sem)
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{
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TX_SEMAPHORE *TheSem;
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UINT temp1;
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/* Assign a temporary variable for clarity. */
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TheSem = (TX_SEMAPHORE *)sem;
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if( !TheSem || TheSem->tx_semaphore_id != TX_SEMAPHORE_ID)
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{
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/* Set appropriate errno. */
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posix_errno = EINVAL;
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posix_set_pthread_errno(EINVAL);
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/* Return ERROR. */
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return (EINVAL);
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}
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/* Place an instance of the semaphore. */
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temp1 = tx_semaphore_put(TheSem);
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/* Make sure the semaphore was incremented. */
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if (temp1 != TX_SUCCESS)
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{
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/* return generic error. */
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posix_internal_error(159);
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/* Return ERROR. */
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return (ERROR);
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}
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/* All done. */
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return(temp1);
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}
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