LCOV - code coverage report
Current view: top level - extensions/source/plugin/unx - mediator.cxx (source / functions) Hit Total Coverage
Test: commit 10e77ab3ff6f4314137acd6e2702a6e5c1ce1fae Lines: 1 149 0.7 %
Date: 2014-11-03 Functions: 2 19 10.5 %
Legend: Lines: hit not hit

          Line data    Source code
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      19             :  * GNU Lesser General Public License version 3 for more details
      20             :  * (a copy is included in the LICENSE file that accompanied this code).
      21             :  *
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      23             :  * version 3 along with OpenOffice.org.  If not, see
      24             :  * <http://www.openoffice.org/license.html>
      25             :  * for a copy of the LGPLv3 License.
      26             :  *
      27             :  ************************************************************************/
      28             : 
      29             : #include <errno.h>
      30             : #include <unistd.h>
      31             : 
      32             : #include <plugin/unx/mediator.hxx>
      33             : #include <sal/log.hxx>
      34             : #include <vcl/svapp.hxx>
      35             : #include <boost/scoped_array.hpp>
      36             : 
      37             : #define MEDIATOR_MAGIC 0xf7a8d2f4
      38             : 
      39           0 : Mediator::Mediator( int nSocket ) :
      40             :         m_nSocket( nSocket ),
      41             :         m_pListener( NULL ),
      42             :         m_nCurrentID( 1 ),
      43           0 :         m_bValid( true )
      44             : {
      45           0 :     m_pListener = new MediatorListener( this );
      46           0 :     m_pListener->create();
      47           0 : }
      48             : 
      49           0 : Mediator::~Mediator()
      50             : {
      51           0 :     if( m_pListener )
      52             :     {
      53             :         {
      54           0 :             ::osl::MutexGuard aGuard( m_pListener->m_aMutex );
      55           0 :             m_pListener->m_pMediator = NULL;
      56             :         }
      57           0 :         m_pListener = NULL;
      58           0 :         if( m_bValid )
      59             :         {
      60             :             sal_uLong aHeader[3];
      61           0 :             aHeader[0] = 0;
      62           0 :             aHeader[1] = 0;
      63           0 :             aHeader[2] = MEDIATOR_MAGIC;
      64           0 :             ssize_t nToWrite = sizeof(aHeader);
      65           0 :             bool bSuccess = (nToWrite == write(m_nSocket, aHeader, nToWrite));
      66             :             SAL_WARN_IF(!bSuccess, "extensions.plugin", "short write");
      67             :         }
      68             :         // kick the thread out of its run method; it deletes itself
      69           0 :         close( m_nSocket );
      70             :     }
      71             :     else
      72           0 :         close( m_nSocket );
      73           0 :     for( std::vector< MediatorMessage* >::iterator it = m_aMessageQueue.begin();
      74           0 :          it != m_aMessageQueue.end(); ++it )
      75             :     {
      76           0 :         delete *it;
      77             :     }
      78           0 : }
      79             : 
      80             : 
      81           0 : sal_uLong Mediator::SendMessage( sal_uLong nBytes, const char* pBytes, sal_uLong nMessageID )
      82             : {
      83           0 :     if( ! m_pListener )
      84           0 :         return 0;
      85             : 
      86           0 :     osl::MutexGuard aGuard( m_aSendMutex );
      87           0 :     if( ! nMessageID )
      88           0 :         nMessageID = m_nCurrentID;
      89             : 
      90           0 :     m_nCurrentID++;
      91           0 :     if( m_nCurrentID >= 1 << 24 ) // protection against overflow
      92           0 :         m_nCurrentID = 1;
      93             : 
      94           0 :     if( ! m_bValid )
      95           0 :         return nMessageID;
      96             : 
      97           0 :     boost::scoped_array<sal_uLong> pBuffer(new sal_uLong[ (nBytes/sizeof(sal_uLong)) + 4 ]);
      98           0 :     pBuffer[ 0 ] = nMessageID;
      99           0 :     pBuffer[ 1 ] = nBytes;
     100           0 :     pBuffer[ 2 ] = MEDIATOR_MAGIC;
     101           0 :     memcpy( &pBuffer[3], pBytes, (size_t)nBytes );
     102           0 :     ssize_t nToWrite = nBytes + 3*sizeof( sal_uLong );
     103           0 :     bool bSuccess = (nToWrite == write( m_nSocket, pBuffer.get(), nToWrite ));
     104             :     SAL_WARN_IF(!bSuccess, "extensions.plugin", "short write");
     105             : 
     106           0 :     return nMessageID;
     107             : }
     108             : 
     109           0 : bool Mediator::WaitForMessage( sal_uLong nTimeOut )
     110             : {
     111           0 :     if( ! m_pListener )
     112           0 :         return false;
     113             : 
     114           0 :     size_t nItems = m_aMessageQueue.size();
     115             : 
     116           0 :     if( ! nTimeOut && nItems > 0 )
     117           0 :         return true;
     118             : 
     119             :     TimeValue aValue;
     120           0 :     aValue.Seconds = nTimeOut/1000;
     121           0 :     aValue.Nanosec = ( nTimeOut % 1000 ) * 1000;
     122             : 
     123           0 :     while( m_aMessageQueue.size() == nItems )
     124             :     {
     125           0 :         m_aNewMessageCdtn.wait( & aValue );
     126           0 :         m_aNewMessageCdtn.reset();
     127           0 :         if( nTimeOut && m_aMessageQueue.size() == nItems )
     128           0 :             return false;
     129             :     }
     130           0 :     return true;
     131             : }
     132             : 
     133           0 : MediatorMessage* Mediator::WaitForAnswer( sal_uLong nMessageID )
     134             : {
     135           0 :     nMessageID &= 0x00ffffff;
     136           0 :     while( m_pListener )
     137             :     {
     138             :         {
     139           0 :             osl::MutexGuard aGuard( m_aQueueMutex );
     140           0 :             for( size_t i = 0; i < m_aMessageQueue.size(); i++ )
     141             :             {
     142           0 :                 MediatorMessage* pMessage = m_aMessageQueue[ i ];
     143           0 :                 sal_uLong nID = pMessage->m_nID;
     144           0 :                 if(  ( nID & 0xff000000 ) &&
     145           0 :                      ( ( nID & 0x00ffffff ) == nMessageID ) )
     146             :                 {
     147           0 :                     m_aMessageQueue.erase( m_aMessageQueue.begin() + i );
     148           0 :                     return pMessage;
     149             :                 }
     150           0 :             }
     151             :         }
     152           0 :         WaitForMessage( 10 );
     153             :     }
     154           0 :     return NULL;
     155             : }
     156             : 
     157           0 : MediatorMessage* Mediator::GetNextMessage( bool bWait )
     158             : {
     159           0 :     while( m_pListener )
     160             :     {
     161             :         {
     162             :             // guard must be after WaitForMessage, else the listener
     163             :             // cannot insert a new one -> deadlock
     164           0 :             osl::MutexGuard aGuard( m_aQueueMutex );
     165           0 :             for( size_t i = 0; i < m_aMessageQueue.size(); i++ )
     166             :             {
     167           0 :                 MediatorMessage* pMessage = m_aMessageQueue[ i ];
     168           0 :                 if( ! ( pMessage->m_nID & 0xff000000 ) )
     169             :                 {
     170           0 :                     m_aMessageQueue.erase( m_aMessageQueue.begin() + i );
     171           0 :                     return pMessage;
     172             :                 }
     173             :             }
     174           0 :             if( ! bWait )
     175           0 :                 return NULL;
     176             :         }
     177           0 :         WaitForMessage();
     178             :     }
     179           0 :     return NULL;
     180             : }
     181             : 
     182           0 : MediatorMessage* Mediator::TransactMessage( sal_uLong nBytes, char* pBytes )
     183             : {
     184           0 :     sal_uLong nID = SendMessage( nBytes, pBytes );
     185           0 :     return WaitForAnswer( nID );
     186             : }
     187             : 
     188           0 : MediatorListener::MediatorListener( Mediator* pMediator ) :
     189           0 :         m_pMediator( pMediator )
     190             : {
     191           0 : }
     192             : 
     193           0 : MediatorListener::~MediatorListener()
     194             : {
     195           0 : }
     196             : 
     197           0 : void MediatorListener::run()
     198             : {
     199           0 :     osl_setThreadName("MediatorListener");
     200             : 
     201           0 :     bool bRun = true;
     202           0 :     while( schedule() && m_pMediator && bRun )
     203             :     {
     204             :         sal_uLong nHeader[ 3 ];
     205             :         int nBytes;
     206             : 
     207           0 :         if( ( nBytes = read( m_pMediator->m_nSocket, nHeader, sizeof( nHeader ) ) ) == sizeof( nHeader ) && nHeader[2] == MEDIATOR_MAGIC)
     208             :         {
     209           0 :             if( nHeader[ 0 ] == 0 && nHeader[ 1 ] == 0 )
     210           0 :                 return;
     211           0 :             boost::scoped_array<char> pBuffer(new char[ nHeader[ 1 ] ]);
     212           0 :             if( m_pMediator && (sal_uLong)read( m_pMediator->m_nSocket, pBuffer.get(), nHeader[ 1 ] ) == nHeader[ 1 ] )
     213             :             {
     214           0 :                 ::osl::MutexGuard aMyGuard( m_aMutex );
     215             :                 {
     216             :                     osl::MutexGuard
     217           0 :                         aGuard( m_pMediator->m_aQueueMutex );
     218             :                     MediatorMessage* pMessage =
     219           0 :                         new MediatorMessage( nHeader[ 0 ], nHeader[ 1 ], pBuffer.get() );
     220           0 :                     m_pMediator->m_aMessageQueue.push_back( pMessage );
     221             :                 }
     222           0 :                 m_pMediator->m_aNewMessageCdtn.set();
     223           0 :                 m_pMediator->m_aNewMessageHdl.Call( m_pMediator );
     224             :             }
     225             :             else
     226             :             {
     227             :                 SAL_WARN(
     228             :                     "extensions.plugin",
     229             :                     "got incomplete MediatorMessage: { " << nHeader[0] << ", "
     230             :                         << nHeader[1] << ", ... }");
     231           0 :                 bRun = false;
     232           0 :             }
     233             :         }
     234             :         else
     235             :         {
     236             :             SAL_WARN(
     237             :                 "extensions.plugin",
     238             :                 "got incomplete message header of " << nBytes
     239             :                     << " bytes (nHeader = [" << nHeader[0] << ", " << nHeader[1]
     240             :                     << "]), errno is " << errno);
     241           0 :             bRun = false;
     242             :         }
     243             :     }
     244             : }
     245             : 
     246           0 : void MediatorListener::onTerminated()
     247             : {
     248           0 :     if( m_pMediator )
     249             :     {
     250           0 :         m_pMediator->m_aConnectionLostHdl.Call( m_pMediator );
     251           0 :         m_pMediator->m_pListener = NULL;
     252             :     }
     253           0 :     delete this;
     254           0 : }
     255             : 
     256           0 : sal_uLong MediatorMessage::ExtractULONG()
     257             : {
     258           0 :     if( ! m_pRun )
     259           0 :         m_pRun = m_pBytes;
     260             : 
     261             :     SAL_WARN_IF(
     262             :         (sal_uLong)(m_pRun - m_pBytes) >= m_nBytes, "extensions.plugin",
     263             :         "overflow in MediatorMessage::ExtractULONG");
     264             :     sal_uLong nCount;
     265           0 :     memcpy( &nCount, m_pRun, sizeof( sal_uLong ) );
     266           0 :     m_pRun += sizeof( sal_uLong );
     267           0 :     return nCount;
     268             : }
     269             : 
     270           0 : void* MediatorMessage::GetBytes( sal_uLong& rBytes )
     271             : {
     272           0 :     if( ! m_pRun )
     273           0 :         m_pRun = m_pBytes;
     274             : 
     275             :     SAL_WARN_IF(
     276             :         (sal_uLong)(m_pRun - m_pBytes) >= m_nBytes, "extensions.plugin",
     277             :         "overflow in MediatorMessage::GetBytes");
     278           0 :     sal_uLong nBytes = ExtractULONG();
     279             : 
     280           0 :     if( nBytes == 0 )
     281           0 :         return NULL;
     282             : 
     283             :     SAL_WARN_IF(
     284             :         (sal_uLong)(m_pRun - m_pBytes) >= m_nBytes, "extensions.plugin",
     285             :         "overflow in MediatorMessage::GetBytes");
     286           0 :     char* pBuffer = new char[ nBytes ];
     287           0 :     memcpy( pBuffer, m_pRun, nBytes );
     288           0 :     m_pRun += nBytes;
     289           0 :     rBytes = nBytes;
     290           0 :     return pBuffer;
     291             : }
     292             : 
     293           0 : char* MediatorMessage::GetString()
     294             : {
     295           0 :     if( ! m_pRun )
     296           0 :         m_pRun = m_pBytes;
     297             : 
     298             :     SAL_WARN_IF(
     299             :         (sal_uLong)(m_pRun - m_pBytes) >= m_nBytes, "extensions.plugin",
     300             :         "overflow in MediatorMessage::GetString");
     301           0 :     sal_uLong nBytes = ExtractULONG();
     302             : 
     303           0 :     if( nBytes == 0 )
     304           0 :         return NULL;
     305             : 
     306             :     SAL_WARN_IF(
     307             :         (sal_uLong)(m_pRun - m_pBytes) >= m_nBytes, "extensions.plugin",
     308             :         "overflow in MediatorMessage::GetString");
     309           0 :     char* pBuffer = new char[ nBytes+1 ];
     310           0 :     memcpy( pBuffer, m_pRun, nBytes );
     311           0 :     pBuffer[ nBytes ] = 0;
     312           0 :     m_pRun += nBytes;
     313           0 :     return pBuffer;
     314             : }
     315             : 
     316           0 : sal_uInt32 MediatorMessage::GetUINT32()
     317             : {
     318           0 :     if( ! m_pRun )
     319           0 :         m_pRun = m_pBytes;
     320             : 
     321             :     SAL_WARN_IF(
     322             :         (sal_uLong)(m_pRun - m_pBytes) >= m_nBytes, "extensions.plugin",
     323             :         "overflow in MediatorMessage::GetUINT32");
     324           0 :     sal_uLong nBytes = ExtractULONG();
     325             :     SAL_WARN_IF(
     326             :         nBytes != sizeof( sal_uInt32 ), "extensions.plugin",
     327             :         "no sal_uInt32 in MediatorMessage::GetUINT32");
     328             :     SAL_WARN_IF(
     329             :         (sal_uLong)(m_pRun - m_pBytes) >= m_nBytes, "extensions.plugin",
     330             :         "overflow in MediatorMessage::GetUINT32");
     331             :     sal_uInt32 nRet;
     332           0 :     memcpy( &nRet, m_pRun, sizeof( nRet ) );
     333           0 :     m_pRun += sizeof( sal_uInt32 );
     334           0 :     return nRet;
     335           6 : }
     336             : 
     337             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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