94 lines
5.5 KiB
C
94 lines
5.5 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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/* pthread_cond_init 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 shall initialize the condition variable referenced by */
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/* cond with attributes referenced by attr. If attr is NULL,the default*/
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/* condition variable attributes shall be used; the effect is the same */
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/* as passing the address of a default condition variable attributes */
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/* object. Upon successful initialization, the state of the condition */
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/* variable shall become initialized. */
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/* */
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/* INPUT */
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/* */
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/* Nothing */
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/* */
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/* OUTPUT */
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/* */
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/* cond condition variable object */
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/* attr attributes */
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/* */
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/* CALLS */
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/* */
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/* tx_semaphore_create create a semaphore internal to */
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/* cond variable */
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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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/* xx-xx-xxxx William E. Lamie Initial Version 6.x */
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/* */
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/**************************************************************************/
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INT pthread_cond_init(pthread_cond_t *cond, pthread_condattr_t *attr)
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{
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TX_SEMAPHORE *semaphore_ptr;
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UINT status;
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cond->in_use = TX_TRUE;
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/* Get the condition variable's internal semaphore. */
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/* Simply convert the COndition variable control block into a semaphore a cast */
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semaphore_ptr = (&( cond->cond_semaphore ));
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/* Now create the internal semaphore for this cond variable */
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status = tx_semaphore_create(semaphore_ptr,"csem",0);
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if (status != TX_SUCCESS)
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{
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posix_errno = EINVAL;
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posix_set_pthread_errno(EINVAL);
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return(EINVAL);
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}
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else
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return(OK);
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}
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