common_smp/src/txe_event_flags_set.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                                                     */
/**                                                                       */
/**   Event Flags                                                         */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/

#define TX_SOURCE_CODE


/* Include necessary system files.  */

#include "tx_api.h"
#include "tx_event_flags.h"


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _txe_event_flags_set                                PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    William E. Lamie, Microsoft Corporation                             */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function checks for errors in the set event flags function     */
/*    call.                                                               */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    group_ptr                         Pointer to group control block    */
/*    flags_to_set                      Event flags to set                */
/*    set_option                        Specified either AND or OR        */
/*                                        operation on the event flags    */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    TX_GROUP_ERROR                    Invalid event flags group pointer */
/*    TX_OPTION_ERROR                   Invalid set option                */
/*    status                            Actual completion status          */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _tx_event_flags_set               Actual set event flags 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_event_flags_set(TX_EVENT_FLAGS_GROUP *group_ptr, ULONG flags_to_set, UINT set_option)
{

UINT        status;


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

    /* Check for an invalid event flag group pointer.  */
    if (group_ptr == TX_NULL)
    {

        /* Event flags group pointer is invalid, return appropriate error code.  */
        status =  TX_GROUP_ERROR;
    }

    /* Now check for invalid event flag group ID.  */
    else if (group_ptr -> tx_event_flags_group_id != TX_EVENT_FLAGS_ID)
    {

        /* Event flags group pointer is invalid, return appropriate error code.  */
        status =  TX_GROUP_ERROR;
    }
    else
    {

        /* Check for invalid set option.  */
        if (set_option != TX_AND)
        {

            if (set_option != TX_OR)
            {

                /* Invalid set events option, return appropriate error.  */
                status =  TX_OPTION_ERROR;
            }
        }
    }

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

        /* Call actual event flags set function.  */
        status =  _tx_event_flags_set(group_ptr, flags_to_set, set_option);
    }

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