common_smp/src/txe_mutex_put.c


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/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation 
 * 
 * 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
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** ThreadX Component                                                     */
/**                                                                       */
/**   Mutex                                                               */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/

#define TX_SOURCE_CODE


/* Include necessary system files.  */

#include "tx_api.h"
#include "tx_initialize.h"
#include "tx_thread.h"
#include "tx_mutex.h"


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _txe_mutex_put                                      PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    William E. Lamie, Microsoft Corporation                             */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function checks for errors in the mutex put function call.     */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    mutex_ptr                     Pointer to mutex control block        */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    TX_MUTEX_ERROR                Invalid mutex pointer                 */
/*    status                        Actual completion status              */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _tx_mutex_put                 Actual put mutex function             */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application Code                                                    */
/*                                                                        */
/*  RELEASE HISTORY                                                       */
/*                                                                        */
/*    DATE              NAME                      DESCRIPTION             */
/*                                                                        */
/*  05-19-2020     William E. Lamie         Initial Version 6.0           */
/*  09-30-2020     Yuxin Zhou               Modified comment(s),          */
/*                                            resulting in version 6.1    */
/*                                                                        */
/**************************************************************************/
UINT  _txe_mutex_put(TX_MUTEX *mutex_ptr)
{

UINT            status;


    /* Default status to success.  */
    status =  TX_SUCCESS;

    /* Check for an invalid mutex pointer.  */
    if (mutex_ptr == TX_NULL)
    {

        /* Mutex pointer is invalid, return appropriate error code.  */
        status =  TX_MUTEX_ERROR;
    }

    /* Now check for invalid mutex ID.  */
    else if (mutex_ptr -> tx_mutex_id != TX_MUTEX_ID)
    {

        /* Mutex pointer is invalid, return appropriate error code.  */
        status =  TX_MUTEX_ERROR;
    }
    else
    {

        /* Check for interrupt call.  */
        if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0))
        {

            /* Now, make sure the call is from an interrupt and not initialization.  */
            if (TX_THREAD_GET_SYSTEM_STATE() < TX_INITIALIZE_IN_PROGRESS)
            {

                /* Invalid caller of this function, return appropriate error code.  */
                status =  TX_CALLER_ERROR;
            }
        }
    }

    /* Determine if everything is okay.  */
    if (status == TX_SUCCESS)
    {

        /* Call actual put mutex function.  */
        status =  _tx_mutex_put(mutex_ptr);
    }

    /* Return completion status.  */
    return(status);
}