/*

* 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: 

*    Implementation for the RDosServer class.

*

*/

#include <e32svr.h>

#include "dosclientserver.h"

#include "dosserver.h"

#include "dos_debug.h"

// CONSTANTS

const TUid KDosServerUid = {0x101f6efa};

const TInt KConnectionTries = 5;

#if defined(__WINS__)

_LIT( KDosSrvLibName, "DosSrv.dll" );

const TInt KDosSrvThreadStartPos = 103;

#endif

// ================= MEMBER FUNCTIONS =======================

// -----------------------------------------------------------------------------

// RDosServer::StartServer

// Creates the server thread/process

// -----------------------------------------------------------------------------

EXPORT_C TInt RDosServer::StartServer() const

{

    API_TRACE_( "[DOSSERVER] RDosServer::StartServer()" );

    TInt ret(KErrNone);

	TRequestStatus status;

    // IPCv2: TSignal no longer used, but still passed to threadfunction as 

	// otherwise API change would be required.

	CDosServer::TSignal signal( status );

	// Create startup semaphore

	RSemaphore startupSemaphore;

	ret = startupSemaphore.CreateGlobal( KServerStartupSemaphoreName, 0 );

	if ( ret == KErrAlreadyExists )

		{

		// The server is starting up, but has not yet started 

		startupSemaphore.OpenGlobal( KServerStartupSemaphoreName );

		startupSemaphore.Wait(); // wait until the server has started up.

		startupSemaphore.Close();

		return ret;

		}

	// launch server thread (emulator) or process (Target platform)

	RProcess server;

	ret = server.Create( KDosServerExe, signal.Get(),

                       TUidType( KNullUid, KNullUid, KDosServerUid ),

                       EOwnerThread );

	if ( ret )

	{

		startupSemaphore.Close();

		return ret;

	}

	server.SetPriority(EPriorityHigh);

	server.Resume();

	server.Close();

	startupSemaphore.Wait();

	startupSemaphore.Close();

	return KErrNone;

}

// -----------------------------------------------------------------------------

// RDosServer::Connect

// -----------------------------------------------------------------------------

EXPORT_C TInt RDosServer::Connect()

{

    API_TRACE_( "[DOSSERVER] RDosServer::Connect()" );

    TInt err( KErrNone );

    for ( TInt tries = 0; tries < KConnectionTries ; tries++ )

    {

    COM_TRACE_1( "[DOSSERVER]\t RDosServer::Connect() tries: %d", tries );

        err = CreateSession( KDosServerName, TVersion(1,0,0));

        COM_TRACE_1( "[DOSSERVER]\t RDosServer::Connect()-CreateSession err: %d", err );

        // Break if connected to existing server or if the problem is

        // other than missing server.

        if ( err == KErrNone || 

           ( err != KErrNotFound && err != KErrServerTerminated ) )

        {

            break;

        }

        // do not try to start server on last round (since if it failed before with KErrNone

        // (i.e. failure in server side on launch),

        // it is likely to fail again and reset the error code to KErrNone)

        if ( tries < (KConnectionTries - 1) )

		{

	        err = StartServer();    // try start a new server

            COM_TRACE_1( "[DOSSERVER]\t RDosServer::Connect()-StartServer err: %d", err );

			// If server launched ok or someone else got to launch it first,

			// try connect again.

			if ( err != KErrNone && err != KErrAlreadyExists )

			{

				break; // server not launched: don't cycle round again

			}

		}

    }

    return err;

}

// FLAGS STRUCTURE (It always goes in the third (2) position of the parameter array)

//

// KAutoComplete:

// 

// Position: 0 0 0 0 0 0 0 x

// Values:	0 -> AutoComplete is not active.

//			1 -> AutoComplete is active.

// -----------------------------------------------------------------------------

// RDosServer::Close()

// Closes the session.

// -----------------------------------------------------------------------------

EXPORT_C void RDosServer::Close() 

{

    API_TRACE_( "[DOSSERVER] RDosServer::Close()" );

    RSessionBase::Close();  // deletes session object

}

// -----------------------------------------------------------------------------

// RDosServer::ServerShutdown()

// Shutdowns the server

// -----------------------------------------------------------------------------

EXPORT_C void RDosServer::ServerShutdown() const

{

    API_TRACE_( "[DOSSERVER] RDosServer::ServerShutdown()" );

    Send(EServerShutdown, TIpcArgs(TIpcArgs::ENothing, TIpcArgs::ENothing, KAutoComplete));

}