Transfers.cpp

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//
// Transfers.cpp
//
// Copyright (c) Shareaza Development Team, 2002-2005.
// This file is part of SHAREAZA (www.shareaza.com)
//
// Shareaza is free software; you can redistribute it
// and/or modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2 of
// the License, or (at your option) any later version.
//
// Shareaza is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Shareaza; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//

#include "StdAfx.h"
#include "Shareaza.h"
#include "Settings.h"
#include "Transfers.h"
#include "Transfer.h"
#include "TransferFile.h"
#include "Downloads.h"
#include "Uploads.h"
#include "EDClients.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

CTransfers Transfers;


// CTransfers construction

CTransfers::CTransfers()
{
        m_nBuffer               = 256*1024;
        m_pBuffer               = new BYTE[ m_nBuffer ];
        m_hThread               = NULL;
        m_bThread               = FALSE;
        m_nRunCookie    = 0;
}

CTransfers::~CTransfers()
{
        StopThread();
        delete [] m_pBuffer;
}

// CTransfers list tests

int CTransfers::GetActiveCount() const
{
        return Downloads.GetCount( TRUE ) + Uploads.GetTransferCount();
}

BOOL CTransfers::IsConnectedTo(IN_ADDR* pAddress)
{
        CSingleLock pLock( &m_pSection );
        if ( ! pLock.Lock( 100 ) ) return FALSE;

        for ( POSITION pos = GetIterator() ; pos ; )
        {
                if ( GetNext( pos )->m_pHost.sin_addr.S_un.S_addr == pAddress->S_un.S_addr ) return TRUE;
        }

        return FALSE;
}

// CTransfers thread start and stop

BOOL CTransfers::StartThread()
{
        if ( m_hThread != NULL && m_bThread ) return TRUE;
        if ( GetCount() == 0 && Downloads.GetCount() == 0 ) return FALSE;

        m_hThread       = NULL;
        m_bThread       = TRUE;

        CWinThread* pThread = AfxBeginThread( ThreadStart, this, THREAD_PRIORITY_NORMAL );
        m_hThread = pThread->m_hThread;

        return TRUE;
}

void CTransfers::StopThread()
{
        if ( m_hThread == NULL ) return;

        m_bThread = FALSE;
        m_pWakeup.SetEvent();

    int nAttempt = 40;
        for ( ; nAttempt > 0 ; nAttempt-- )
        {
                DWORD nCode;
                if ( ! GetExitCodeThread( m_hThread, &nCode ) ) break;
                if ( nCode != STILL_ACTIVE ) break;
                Sleep( 100 );
        }

        if ( nAttempt == 0 )
        {
                TerminateThread( m_hThread, 0 );
                theApp.Message( MSG_DEBUG, _T("WARNING: Terminating CTransfers thread.") );
                Sleep( 100 );
        }

        m_hThread = NULL;

        Downloads.m_nTransfers  = 0;
        Downloads.m_nBandwidth  = 0;
        Uploads.m_nCount                = 0;
        Uploads.m_nBandwidth    = 0;
}

// CTransfers registration

void CTransfers::Add(CTransfer* pTransfer)
{
        ASSERT( pTransfer->m_hSocket != INVALID_SOCKET );
        WSAEventSelect( pTransfer->m_hSocket, m_pWakeup, FD_CONNECT|FD_READ|FD_WRITE|FD_CLOSE );

        POSITION pos = m_pList.Find( pTransfer );
        ASSERT( pos == NULL );
        if ( pos == NULL ) m_pList.AddHead( pTransfer );

        if ( Settings.General.Debug && Settings.General.DebugLog ) theApp.Message( MSG_DEBUG, _T("CTransfers::Add(): %x"), pTransfer );

        StartThread();
}

void CTransfers::Remove(CTransfer* pTransfer)
{
        if ( Settings.General.Debug && Settings.General.DebugLog ) theApp.Message( MSG_DEBUG, _T("CTransfers::Remove(): %x"), pTransfer );

        if ( pTransfer->m_hSocket != INVALID_SOCKET )
                WSAEventSelect( pTransfer->m_hSocket, m_pWakeup, 0 );

        CTransfers::Lock oLock;
        if ( POSITION pos = m_pList.Find( pTransfer ) )
                m_pList.RemoveAt( pos );
}

// CTransfers thread run

UINT CTransfers::ThreadStart(LPVOID pParam)
{
        CTransfers* pTransfers = (CTransfers*)pParam;
        pTransfers->OnRun();
        return 0;
}

void CTransfers::OnRun()
{
        while ( m_bThread )
        {
                Sleep( Settings.General.MinTransfersRest );
                WaitForSingleObject( m_pWakeup, 50 );

                CTransfers::Lock(), EDClients.OnRun();
                if ( ! m_bThread ) break;

                OnRunTransfers();
                if ( ! m_bThread ) break;
                Downloads.OnRun();
                if ( ! m_bThread ) break;

                CTransfers::Lock(), Uploads.OnRun(), OnCheckExit();

                TransferFiles.CommitDeferred();
        }

        Downloads.m_nTransfers = Downloads.m_nBandwidth = 0;
        Uploads.m_nCount = Uploads.m_nBandwidth = 0;
}

void CTransfers::OnRunTransfers()
{
        CTransfers::Lock oLock;
        ++m_nRunCookie;

        while ( !m_pList.IsEmpty()
                && static_cast< CTransfer* >( m_pList.GetHead() )->m_nRunCookie != m_nRunCookie )
        {
                CTransfer* pTransfer = static_cast< CTransfer* >( m_pList.RemoveHead() );
                m_pList.AddTail( pTransfer );
                pTransfer->m_nRunCookie = m_nRunCookie;
                pTransfer->DoRun();
        }
}

void CTransfers::OnCheckExit()
{
        if ( GetCount() == 0 && Downloads.GetCount() == 0 ) m_bThread = FALSE;

        if ( Settings.Live.AutoClose && GetActiveCount() == 0 )
        {
                CSingleLock pLock( &theApp.m_pSection );

                if ( pLock.Lock( 250 ) )
                {
                        if ( CWnd* pWnd = (CWnd*)theApp.SafeMainWnd() )
                        {
                                Settings.Live.AutoClose = FALSE;
                                pWnd->PostMessage( WM_CLOSE );
                        }
                }
        }
}

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