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Add support for thread-specific log targets.

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A worker thread can now have its own log target which will be used directly
by the log functions instead of buffering log output in the main thread; the
GUI thread in the thread sample shows how it works.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61422 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2009-07-13 11:09:26 +00:00
parent 409aa9e1ef
commit acad886cb4
6 changed files with 228 additions and 45 deletions
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26
samples/thread/thread.cpp
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@@ -5,7 +5,7 @@
// Modified by:
// Created: 06/16/98
// RCS-ID: $Id$
// Copyright: (c) 1998-2002 wxWidgets team
// Copyright: (c) 1998-2009 wxWidgets team
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
@@ -720,8 +720,8 @@ void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event) )
wxMessageDialog dialog(this,
_T("wxWidgets multithreaded application sample\n")
_T("(c) 1998 Julian Smart, Guilhem Lavaux\n")
_T("(c) 1999 Vadim Zeitlin\n")
_T("(c) 2000 Robert Roebling"),
_T("(c) 2000 Robert Roebling\n")
_T("(c) 1999,2009 Vadim Zeitlin"),
_T("About wxThread sample"),
wxOK | wxICON_INFORMATION);
@@ -1003,6 +1003,14 @@ wxThread::ExitCode MyWorkerThread::Entry()
wxThread::ExitCode MyGUIThread::Entry()
{
// this goes to the main window
wxLogMessage("GUI thread starting");
// use a thread-specific log target for this thread to show that its
// messages don't appear in the main window while it runs
wxLogBuffer logBuf;
wxLog::SetThreadActiveTarget(&logBuf);
for (int i=0; i<GUITHREAD_NUM_UPDATES && !TestDestroy(); i++)
{
// inform the GUI toolkit that we're going to use GUI functions
@@ -1029,10 +1037,22 @@ wxThread::ExitCode MyGUIThread::Entry()
event.SetInt(i+1);
wxQueueEvent( m_dlg, event.Clone() );
if ( !((i + 1) % 10) )
{
// this message will go to the buffer
wxLogMessage("Step #%d.", i + 1);
}
// give the main thread the time to refresh before we lock the GUI mutex again
// FIXME: find a better way to do this!
wxMilliSleep(100);
}
// now remove the thread-specific thread target
wxLog::SetThreadActiveTarget(NULL);
// so that this goes to the main window again
wxLogMessage("GUI thread finished.");
return (ExitCode)0;
}