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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_unlock PORTABLE C */
/* 6.1.7 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function shall release the mutex object referenced by mutex. */
/* The manner in which a mutex is released is dependent upon the mutex */
/* type attribute. If there are threads blocked on the mutex object */
/* referenced by mutex when pthread_mutex_unlock() is called,resulting */
/* in the mutex becoming available,the scheduling policy shall */
/* determine which thread shall acquire the mutex. */
/* */
/* INPUT */
/* */
/* mutex Address of the mutex */
/* */
/* OUTPUT */
/* */
/* 0 if successful */
/* Value in case of any error */
/* */
/* CALLS */
/* */
/* tx_mutex_put ThreadX Mutex service */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
INT pthread_mutex_unlock(pthread_mutex_t *mutex )
{
TX_MUTEX *mutex_ptr;
INT retval,status;
/* convert pthread mutex object to ThreadX mutex */
mutex_ptr = (TX_MUTEX*)mutex;
status = tx_mutex_put( mutex_ptr);
switch ( status)
{
case TX_SUCCESS:
retval = OK;
break;
case TX_MUTEX_ERROR:
posix_errno = EINVAL;
posix_set_pthread_errno(EINVAL);
retval = EINVAL;
break;
case TX_NOT_OWNED:
posix_errno = EPERM;
posix_set_pthread_errno(EPERM);
retval = EPERM;
break;
default:
posix_errno = EINVAL;
posix_set_pthread_errno(EINVAL);
retval = EINVAL;
break;
}
return (retval);
}
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