home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
PC World Komputer 1998 May
/
Pcwk5b98.iso
/
Borland
/
Cplus45
/
BC45
/
MTHREAD.PAK
/
MTHREAD.CPP
< prev
next >
Wrap
C/C++ Source or Header
|
1995-08-29
|
4KB
|
157 lines
//----------------------------------------------------------------------------
// ObjectWindows - (C) Copyright 1991, 1993 by Borland International
// A Multi-thread GDI demo program
//----------------------------------------------------------------------------
#include <owl\owlpch.h>
#include <owl\applicat.h>
#include <owl\mdi.h>
#include <string.h>
#include "demobase.h"
#include "line.h"
#include "arty.h"
// Menu bar constants
const int MenuId = 100; // Resource Id of the menubar
const int MoveToLineToDemoId= 201; // Demo->MoveToDemo Id
const int ArtyDemoId = 202; // Demo->Arty Demo Id
const int IconId = 100; // Resource Id of the program icon
//----------------------------------------------------------------------------
int
TOWLThread::Synch()
{
HANDLE Signals[2] = { HANDLE(*GetApplication()->GetMutex()), Done };
return ::WaitForMultipleObjects( 2, Signals, FALSE, -1 );
}
HANDLE
TBaseDemoWindow::Start()
{
HANDLE Result = TThread::Start();
SetPriority( THREAD_PRIORITY_LOWEST );
return Result;
}
unsigned long
TBaseDemoWindow::Run()
{
for(;;)
{
::Sleep(20);
if( Synch() != 0 )
return 0;
else
{
// This is a little tricky. On return from
// Synch() this thread owns a lock on the
// OWL synchronization object. In order to
// be exception-safe we must have an object
// whose destructor will release the lock.
// So we create one, which gives us two nested
// locks on the synchroniztion object. Then
// we release one of the locks. The destructor
// for the TAppLock object releases the other
// one at the end of this block.
TApplication::TAppLock l(*GetApplication());
l.Release();
// Call into the derived class for the actual processing
DoRun();
}
}
}
TApplication *
TBaseDemoWindow::GetApplication() const
{
return TWindow::GetApplication();
}
BOOL
TBaseDemoWindow::CanClose()
{
if( TerminateAndWait( 1000 ) == 0 )
return TRUE;
else
{
MessageBox( "Timeout while terminating thread", "gdidemo.exe" );
return FALSE;
}
}
IMPLEMENT_CASTABLE1(TBaseDemoWindow, TWindow);
//----------------------------------------------------------------------------
class TGdiDemoWindow : public TMDIClient {
public:
TGdiDemoWindow() : TMDIClient() { Attr.Style |= WS_TABSTOP; }
protected:
void CmMoveToLineToDemo();
void CmArtyDemo();
DECLARE_RESPONSE_TABLE(TGdiDemoWindow);
};
DEFINE_RESPONSE_TABLE1(TGdiDemoWindow, TMDIClient)
EV_COMMAND(MoveToLineToDemoId, CmMoveToLineToDemo),
EV_COMMAND(ArtyDemoId, CmArtyDemo),
END_RESPONSE_TABLE;
//
// In response to a demo command, create one of the demo windows as the client
// of an mdi child frame. Turn of the icon for the mdi child to allow the
// client to paint itself when iconic.
//
void
TGdiDemoWindow::CmMoveToLineToDemo()
{
TMDIChild* child = new TMDIChild(*this, "MoveTo/LineTo Window",
new TMoveToLineToWindow);
child->SetIcon(0, 0);
child->Create();
}
void
TGdiDemoWindow::CmArtyDemo()
{
TMDIChild* child = new TMDIChild(*this, "Arty Window", new TArtyWindow);
child->SetIcon(0, 0);
child->Create();
}
//----------------------------------------------------------------------------
class TGdiDemoApp : public TApplication {
public:
TGdiDemoApp() : TApplication() {}
void InitMainWindow();
};
void
TGdiDemoApp::InitMainWindow()
{
MainWindow = new TMDIFrame("Multi-Thread Demo", MenuId, *new TGdiDemoWindow);
MainWindow->SetIcon(this, IconId);
}
int
OwlMain(int /*argc*/, char* /*argv*/ [])
{
#if defined(__WIN32__)
if ((::GetVersion()&0x80000000) && (::GetVersion()&0xFF) < 4) {
::MessageBox(0, "This Example requires a multithreaded version of Windows",
"OWL Examples", MB_OK);
return 0;
}
#endif
return TGdiDemoApp().Run();
}