/*
 * scr.h
 *
 * Copyright(c) 1998 - 2009 Texas Instruments. All rights reserved.      
 * All rights reserved.                                                  
 *                                                                       
 * Redistribution and use in source and binary forms, with or without    
 * modification, are permitted provided that the following conditions    
 * are met:                                                              
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 *  * Redistributions of source code must retain the above copyright     
 *    notice, this list of conditions and the following disclaimer.      
 *  * Redistributions in binary form must reproduce the above copyright  
 *    notice, this list of conditions and the following disclaimer in    
 *    the documentation and/or other materials provided with the         
 *    distribution.                                                      
 *  * Neither the name Texas Instruments nor the names of its            
 *    contributors may be used to endorse or promote products derived    
 *    from this software without specific prior written permission.      
 *                                                                       
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS   
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT     
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT  
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
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 */

/** \file  scr.h
 *  \brief This file includes internal (private) definitions to the SCR module
 *
 *  \see   scrApi.h, scr.c
 */


#ifndef __SCR_H__
#define __SCR_H__

#include "scrApi.h"

/*
 ***********************************************************************
 *  Constant definitions.
 ***********************************************************************
 */

 /*
 ***********************************************************************
 *  Enums.
 ***********************************************************************
 */

/** \enum EScrClientState 
 * \brief enumerates the different states a client may be in .\n
 */
typedef enum
{
    SCR_CS_IDLE = 0,    /**< client is idle */
    SCR_CS_PENDING,     /**< client is pending to use the channel */
    SCR_CS_RUNNING,     /**< client is using the channel */
    SCR_CS_ABORTING     /**< 
                         * client was using the channel, but was aborted, 
                         * and complete notification is expected.
                         */
} EScrClientState;


/*
 ***********************************************************************
 *  Typedefs.
 ***********************************************************************
 */

/*
 ***********************************************************************
 *  Structure definitions.
 ***********************************************************************
 */

/** \struct TScrClient
 * \brief This structure contains information for a specific client
 */
typedef struct
{
    EScrClientState     state[ SCR_RESOURCE_NUM_OF_RESOURCES ];     /**< the client current state, per resource */
    TScrCB              clientRequestCB;                            /**< the client's callback function */
    TI_HANDLE           ClientRequestCBObj;                         /**< the client's object */
    EScePendReason      currentPendingReason[ SCR_RESOURCE_NUM_OF_RESOURCES ];
                                                                    /**< 
                                                                     * the reason why this client is pending
                                                                     * (if at all)
                                                                     */
} TScrClient;

/** \struct TScr
 * \brief This structure contains the SCR object data
 */
typedef struct
{
    TI_HANDLE               hOS;                                    /**< a handle to the OS object */
    TI_HANDLE               hReport;                                /**< a handle to the report object */
    TI_BOOL                 statusNotficationPending;               /**< 
                                                                     * whether the SCR is in the process of  
                                                                     * notifying a status change to a client
                                                                     * (used to solve re-entrance problem)
                                                                     */
    EScrClientId            runningClient[ SCR_RESOURCE_NUM_OF_RESOURCES ];
                                                                    /**< 
                                                                     * The index of the current running client 
                                                                     * (SCR_CID_NO_CLIENT if none), per resource
                                                                     */
    EScrGroupId             currentGroup;                           /**< the current group */
    EScrModeId              currentMode;                            /**< the current mode */
    TScrClient              clientArray[ SCR_CID_NUM_OF_CLIENTS ];  /**< array holding all clients' info */
} TScr;


/*
 ***********************************************************************
 *  External functions definitions
 ***********************************************************************
 */
/**
 * \\n
 * \date 01-Dec-2004\n
 * \brief Searches the client database for a client with matching state, from startFrom to endAt\n
 *
 * Function Scope \e Private.\n
 * \param hScr - handle to the SCR object.\n
 * \param requiredState - the state to match.\n
 * \param eResource - the resource to macth.\n
 * \param startFrom - the highest priority to begin searching from.\n
 * \param endAt - the lowest priority to include in the search.\n
 * \return the client ID if found, SCR_CID_NO_CLIENT if not found.\n
 */
EScrClientId scrFindHighest( TI_HANDLE hScr,
                             EScrClientState requiredState,
                             EScrResourceId eResource,
                             TI_UINT32 startFrom,
                             TI_UINT32 endAt );

#endif /* __SCR_H__ */