mirror of
https://github.com/eclipse-threadx/threadx.git
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99 lines
5.3 KiB
C
99 lines
5.3 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 "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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/* sem_init 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 initializes a nameless sempaphore. */
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/* */
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/* INPUT */
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/* */
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/* sem Semaphore pointer */
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/* pshared Shared semphore (TRUE/FALSE) */
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/* value Initial value */
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/* */
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/* OUTPUT */
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/* */
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/* EINVAL if error occurs */
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/* NO_ERROR successful */
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/* */
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/* CALLS */
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/* */
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/* tx_semaphore_create creates actual THreadx semaphore */
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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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INT sem_init(sem_t *sem , INT pshared, UINT value)
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{
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INT result;
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if((sem==NULL)||(value > SEM_VALUE_MAX)||(sem->in_use==TX_TRUE))
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{
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result = EINVAL; /* general error */
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}
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else
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{
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if(tx_semaphore_create(&(sem->sem),"",value)) result = EINVAL;
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else
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{ /* initialize semaphore fields */
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sem->count = 0;
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sem->in_use = TX_TRUE;
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sem->psemId = 0;
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sem->refCnt = value;
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sem->sem_name = "";
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sem->unlink_flag =TX_FALSE;
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result = NO_ERROR;
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}
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}
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return result;
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}
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