/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  HtiWatchDog implementation.

*

*/

// INCLUDE FILES

#include <e32base.h>

#ifdef __ENABLE_LOGGING__

#include <flogger.h>

_LIT( KLogFolder, "hti" );

_LIT( KLogFile,   "htiwatchdog.txt" );

#define HTI_LOG_TEXT(a1) {_LIT(temp, a1); RFileLogger::Write(KLogFolder, KLogFile, EFileLoggingModeAppend, temp);}

#define HTI_LOG_DES(a1) {RFileLogger::Write(KLogFolder, KLogFile, EFileLoggingModeAppend, a1);}

#define HTI_LOG_FORMAT(a1,a2) {_LIT(temp, a1); RFileLogger::WriteFormat(KLogFolder, KLogFile, EFileLoggingModeAppend, temp, (a2));}

#else   // !__ENABLE_LOGGING__

#define HTI_LOG_TEXT(a1)

#define HTI_LOG_DES(a1)

#define HTI_LOG_FORMAT(a1,a2)

#endif // __ENABLE_LOGGING__

// CONSTANTS

_LIT( KHtiFrameworkExeName,    "HtiFramework.exe" );

_LIT( KHtiMainThreadName,      "HtiMain" );

_LIT( KHtiWatchDogName,        "HtiWatchDog" );

_LIT( KHtiAdminStartParameter, "admin" );

const TTimeIntervalSeconds minInterval( 60 );

// MACROS

// LOCAL CONSTANTS AND MACROS

// MODULE DATA STRUCTURES

// LOCAL FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// ============================ LOCAL FUNCTIONS ===============================

LOCAL_C void StartHtiProcessL()

    {

    RProcess htiProcess;

    User::LeaveIfError( htiProcess.Create(

            KHtiFrameworkExeName, KHtiAdminStartParameter ) );

    htiProcess.Resume();

    htiProcess.Close();

    }

LOCAL_C TInt StartL()

    {

    HTI_LOG_TEXT( "HtiWatchDog starting..." );

    TFullName threadName;

    TFullName matchPattern;

    matchPattern.Append( _L( "*" ) );

    matchPattern.Append( KHtiMainThreadName );

    matchPattern.Append( _L( "*" ) );

    TTime startTime;

    startTime.HomeTime();

    TTimeIntervalSeconds elapsedTime;

    TTime now;

    while ( true )

        {

        // Use thread finder to find the HTI main thread

        TFindThread threadFinder;

        threadFinder.Find( matchPattern );

        HTI_LOG_TEXT( "Trying to find HTI main thread" );

        TInt err =  threadFinder.Next( threadName );

        if ( err )

            {

            HTI_LOG_FORMAT( "HTI main thread not found, err: %d", err );

            User::Panic( _L( "HTI find err" ), err );

            }

        HTI_LOG_TEXT( "HTI main thread found, opening it" );

        RThread thread;

        err = thread.Open( threadName );

        if ( err )

            {

            HTI_LOG_FORMAT( "Could not open HTI main thread, err: %d", err );

            User::Panic( _L( "HTI open err" ), err );

            }

        // Logon to HTI main thread and wait for its death

        HTI_LOG_TEXT( "HTI main thread opened, waiting for its death" );

        TRequestStatus status;

        thread.Logon( status );

        User::WaitForRequest( status );

        thread.Close();

        // try to restart only if minimum interval time has elapsed

        now.HomeTime();

        now.SecondsFrom( startTime, elapsedTime );

        if ( elapsedTime < minInterval )

            {

            HTI_LOG_FORMAT( "HTI died too quickly, in %d seconds", elapsedTime.Int() );

            HTI_LOG_TEXT( "Giving up" );

            break;

            }

        // reset the startTime

        startTime.HomeTime();

        // try to restart HTI

        HTI_LOG_TEXT( "HTI died, trying to restart it" );

        TRAP( err, StartHtiProcessL() );

        if ( err )

            {

            HTI_LOG_FORMAT( "Could not restart HTI, err: %d", err );

            User::Panic( _L( "HTI start err" ), err );

            }

        // wait a while for HTI process to start

        User::After( 5 * 100 * 1000 );

        }

    HTI_LOG_TEXT( "HtiWatchDog shutting down" );

    return KErrNone;

    }

GLDEF_C TInt E32Main()

    {

    __UHEAP_MARK;

    CTrapCleanup* cleanup = CTrapCleanup::New();

    CActiveScheduler *scheduler = new(ELeave) CActiveScheduler;

    CActiveScheduler::Install( scheduler );

    User::RenameThread( KHtiWatchDogName );

    TRAPD( err, StartL() );

    delete scheduler;

    delete cleanup;

   __UHEAP_MARKEND;

    return err;

    }

// End of File