1 /*

     2 * Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *    Implementation for the RDosServer class.

    16 *

    17 */

    18 

    19 

    20 #include <e32svr.h>

    21 #include "DosSvrServices.h"

    22 #include "dosclientserver.h"

    23 #include "dosserver.h"

    24 #include "dos_debug.h"

    25 

    26 // CONSTANTS

    27 const TUid KDosServerUid = {0x101f6efa};

    28 const TInt KConnectionTries = 5;

    29 #if defined(__WINS__)

    30 _LIT( KDosSrvLibName, "DosSrv.dll" );

    31 const TInt KDosSrvThreadStartPos = 103;

    32 #endif

    33 

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

    35 

    36 // -----------------------------------------------------------------------------

    37 // RDosServer::StartServer

    38 // Creates the server thread/process

    39 // -----------------------------------------------------------------------------

    40 EXPORT_C TInt RDosServer::StartServer() const

    41 {

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

    43 

    44     TInt ret(KErrNone);

    45 	TRequestStatus status;

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

    47 	// otherwise API change would be required.

    48 	CDosServer::TSignal signal( status );

    49 

    50 	// Create startup semaphore

    51 	RSemaphore startupSemaphore;

    52 	ret = startupSemaphore.CreateGlobal( KServerStartupSemaphoreName, 0 );

    53 

    54 	if ( ret == KErrAlreadyExists )

    55 		{

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

    57 		startupSemaphore.OpenGlobal( KServerStartupSemaphoreName );

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

    59 		startupSemaphore.Close();

    60 		return ret;

    61 		}

    62 

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

    64 

    65 	RProcess server;

    66 

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

    68                        TUidType( KNullUid, KNullUid, KDosServerUid ),

    69                        EOwnerThread );

    70 

    71 	if ( ret )

    72 	{

    73 		startupSemaphore.Close();

    74 		return ret;

    75 	}

    76 

    77 	server.SetPriority(EPriorityHigh);

    78 

    79 	server.Resume();

    80 	server.Close();

    81 

    82 	startupSemaphore.Wait();

    83 	startupSemaphore.Close();

    84 

    85 	return KErrNone;

    86 }

    87 

    88 // -----------------------------------------------------------------------------

    89 // RDosServer::Connect

    90 // -----------------------------------------------------------------------------

    91 EXPORT_C TInt RDosServer::Connect()

    92 {

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

    94 

    95     TInt err( KErrNone );

    96 

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

    98     {

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

   100 

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

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

   103 

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

   105         // other than missing server.

   106 

   107         if ( err == KErrNone || 

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

   109         {

   110             break;

   111         }

   112 

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

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

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

   116         if ( tries < (KConnectionTries - 1) )

   117 		{

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

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

   120 

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

   122 			// try connect again.

   123 

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

   125 			{

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

   127 			}

   128 		}

   129     }

   130 

   131     return err;

   132 }

   133 

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

   135 //

   136 // KAutoComplete:

   137 // 

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

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

   140 //			1 -> AutoComplete is active.

   141 

   142 

   143 // -----------------------------------------------------------------------------

   144 // RDosServer::Close()

   145 // Closes the session.

   146 // -----------------------------------------------------------------------------

   147 

   148 EXPORT_C void RDosServer::Close() 

   149 {

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

   151 

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

   153 }

   154 

   155 

   156 // -----------------------------------------------------------------------------

   157 // RDosServer::ServerShutdown()

   158 // Shutdowns the server

   159 // -----------------------------------------------------------------------------

   160 

   161 EXPORT_C void RDosServer::ServerShutdown() const

   162 {

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

   164 

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

   166 }

   167