91 lines
5.1 KiB
C
91 lines
5.1 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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/* sem_destroy PORTABLE C */
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/* 6.x */
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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 destroys a nameless semphore */
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/* Waiting threads will be rescheduled */
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/* No memory will be released */
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/* */
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/* INPUT */
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/* */
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/* sem Semaphore pointer */
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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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/* EBUSY if threads were waiting */
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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_delete deletes 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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/* xx-xx-xxxx William E. Lamie Initial Version 6.x */
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/* */
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/**************************************************************************/
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INT sem_destroy(sem_t *sem)
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{
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INT result;
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if((sem==NULL)|| ( sem->in_use == TX_FALSE))
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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(sem->sem.tx_semaphore_suspended_count > 0 ) result = EBUSY;
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else result = NO_ERROR;
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tx_semaphore_delete(&(sem->sem));
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sem->in_use = TX_FALSE;
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}
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return result;
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}
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