utility/rtos_compatibility_layers/posix/px_mx_attr_getprotocol.c


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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_mutexattr_getprotocol                       PORTABLE C      */
/*                                                           6.1.7        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    William E. Lamie, Microsoft Corporation                             */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function shall gets the mutex protocol attribute.              */
/*    The protocol of a mutex is contained in the protocol attribute.     */
/*    attributes.                                                         */
/*                                                                        */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    attr                           Pointer to the mutex attributes      */
/*    protocol                       Pointer to return mutex protocol     */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*     0                             If successful                        */
/*     Value                         In case of any error                 */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application Code                                                    */
/*                                                                        */
/**************************************************************************/
INT  pthread_mutexattr_getprotocol( pthread_mutexattr_t *attr, INT *protocol)
{

    /* First check the attribute object is already destroyed? */
    if (attr->in_use == TX_FALSE)
    {
        posix_errno = EINVAL;
        posix_set_pthread_errno(EINVAL);
        return(EINVAL);
    }
    else
    {
        *protocol = attr->protocol;
        return(OK);
    }
}