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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** POSIX wrapper for THREADX */
/** */
/** */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#include "tx_api.h" /* Threadx API */
#include "pthread.h" /* Posix API */
#include "px_int.h" /* Posix helper functions */
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* pthread_mutex_trylock PORTABLE C */
/* 6.1.7 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function shall be equivalent to pthread_mutex_lock(), except */
/* that if the mutex object referenced by mutex is currently locked */
/* (by any thread,including the current thread), the call shall return */
/* immediately. If the mutex type is PTHREAD_MUTEX_RECURSIVE and the */
/* mutex is currently owned by the calling thread,the mutex lock count */
/* shall be incremented by one and the pthread_mutex_trylock()function */
/* shall immediately return success. */
/* */
/* INPUT */
/* */
/* mutex Pointer to the mutex object */
/* */
/* OUTPUT */
/* */
/* 0 If successful */
/* Value In case of any error */
/* */
/* CALLS */
/* */
/* tx_mutex_get ThreadX Mutex get service. */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
INT pthread_mutex_trylock(pthread_mutex_t *mutex)
{
TX_MUTEX *mutex_ptr;
INT retval,status;
/* convert pthread mutex object to ThreadX mutex */
mutex_ptr = (TX_MUTEX *)mutex;
/* Try to get the mutex */
status = tx_mutex_get( mutex_ptr, TX_NO_WAIT);
switch ( status)
{
case TX_SUCCESS:
retval = OK;
break;
case TX_DELETED:
posix_errno = EINVAL;
posix_set_pthread_errno(EINVAL);
retval = EINVAL;
break;
case TX_NOT_AVAILABLE:
posix_errno = EBUSY;
posix_set_pthread_errno(EBUSY);
retval = EBUSY;
break;
default:
posix_errno = EINVAL;
posix_set_pthread_errno(EINVAL);
retval = EINVAL;
break;
}
return (retval);
}
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