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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2004 Chris Schoeneman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file COPYING that should have accompanied this file.
*
* This package 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.
*/
#include "CMSWindowsEventQueueBuffer.h"
#include "CThread.h"
#include "IEventQueue.h"
#include "CArchMiscWindows.h"
//
// CEventQueueTimer
//
class CEventQueueTimer { };
//
// CMSWindowsEventQueueBuffer
//
CMSWindowsEventQueueBuffer::CMSWindowsEventQueueBuffer()
{
// remember thread. we'll be posting messages to it.
m_thread = GetCurrentThreadId();
// create a message type for custom events
m_userEvent = RegisterWindowMessage("SYNERGY_USER_EVENT");
// get message type for daemon quit
m_daemonQuit = CArchMiscWindows::getDaemonQuitMessage();
// make sure this thread has a message queue
MSG dummy;
PeekMessage(&dummy, NULL, WM_USER, WM_USER, PM_NOREMOVE);
}
CMSWindowsEventQueueBuffer::~CMSWindowsEventQueueBuffer()
{
// do nothing
}
void
CMSWindowsEventQueueBuffer::waitForEvent(double timeout)
{
// check if messages are available first. if we don't do this then
// MsgWaitForMultipleObjects() will block even if the queue isn't
// empty if the messages in the queue were there before the last
// call to GetMessage()/PeekMessage().
if (HIWORD(GetQueueStatus(QS_ALLINPUT)) != 0) {
return;
}
// convert timeout
DWORD t;
if (timeout < 0.0) {
t = INFINITE;
}
else {
t = (DWORD)(1000.0 * timeout);
}
// wait for a message. we cannot be interrupted by thread
// cancellation but that's okay because we're run in the main
// thread and we never cancel that thread.
HANDLE dummy[1];
MsgWaitForMultipleObjects(0, dummy, FALSE, t, QS_ALLINPUT);
}
IEventQueueBuffer::Type
CMSWindowsEventQueueBuffer::getEvent(CEvent& event, UInt32& dataID)
{
// peek at messages first. waiting for QS_ALLINPUT will return
// if a message has been sent to our window but GetMessage will
// dispatch that message behind our backs and block. PeekMessage
// will also dispatch behind our backs but won't block.
if (!PeekMessage(&m_event, NULL, 0, 0, PM_NOREMOVE) &&
!PeekMessage(&m_event, (HWND)-1, 0, 0, PM_NOREMOVE)) {
return kNone;
}
// BOOL. yeah, right.
BOOL result = GetMessage(&m_event, NULL, 0, 0);
if (result == -1) {
return kNone;
}
else if (result == 0) {
event = CEvent(CEvent::kQuit);
return kSystem;
}
else if (m_daemonQuit != 0 && m_event.message == m_daemonQuit) {
event = CEvent(CEvent::kQuit);
return kSystem;
}
else if (m_event.message == m_userEvent) {
dataID = static_cast<UInt32>(m_event.wParam);
return kUser;
}
else {
event = CEvent(CEvent::kSystem,
IEventQueue::getSystemTarget(), &m_event);
return kSystem;
}
}
bool
CMSWindowsEventQueueBuffer::addEvent(UInt32 dataID)
{
return (PostThreadMessage(m_thread, m_userEvent,
static_cast<WPARAM>(dataID), 0) != 0);
}
bool
CMSWindowsEventQueueBuffer::isEmpty() const
{
return (HIWORD(GetQueueStatus(QS_ALLINPUT)) == 0);
}
CEventQueueTimer*
CMSWindowsEventQueueBuffer::newTimer(double, bool) const
{
return new CEventQueueTimer;
}
void
CMSWindowsEventQueueBuffer::deleteTimer(CEventQueueTimer* timer) const
{
delete timer;
}
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