mirror of
https://github.com/debauchee/barrier.git
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139 lines
3.4 KiB
C++
139 lines
3.4 KiB
C++
/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2004 Chris Schoeneman
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*
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* This package is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* found in the file COPYING that should have accompanied this file.
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*
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* This package is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "CMSWindowsEventQueueBuffer.h"
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#include "CThread.h"
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#include "IEventQueue.h"
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#include "CArchMiscWindows.h"
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//
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// CEventQueueTimer
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//
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class CEventQueueTimer { };
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//
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// CMSWindowsEventQueueBuffer
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//
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CMSWindowsEventQueueBuffer::CMSWindowsEventQueueBuffer()
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{
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// remember thread. we'll be posting messages to it.
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m_thread = GetCurrentThreadId();
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// create a message type for custom events
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m_userEvent = RegisterWindowMessage("SYNERGY_USER_EVENT");
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// get message type for daemon quit
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m_daemonQuit = CArchMiscWindows::getDaemonQuitMessage();
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// make sure this thread has a message queue
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MSG dummy;
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PeekMessage(&dummy, NULL, WM_USER, WM_USER, PM_NOREMOVE);
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}
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CMSWindowsEventQueueBuffer::~CMSWindowsEventQueueBuffer()
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{
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// do nothing
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}
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void
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CMSWindowsEventQueueBuffer::waitForEvent(double timeout)
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{
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// check if messages are available first. if we don't do this then
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// MsgWaitForMultipleObjects() will block even if the queue isn't
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// empty if the messages in the queue were there before the last
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// call to GetMessage()/PeekMessage().
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if (HIWORD(GetQueueStatus(QS_ALLINPUT)) != 0) {
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return;
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}
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// convert timeout
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DWORD t;
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if (timeout < 0.0) {
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t = INFINITE;
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}
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else {
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t = (DWORD)(1000.0 * timeout);
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}
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// wait for a message. we cannot be interrupted by thread
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// cancellation but that's okay because we're run in the main
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// thread and we never cancel that thread.
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HANDLE dummy[1];
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MsgWaitForMultipleObjects(0, dummy, FALSE, t, QS_ALLINPUT);
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}
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IEventQueueBuffer::Type
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CMSWindowsEventQueueBuffer::getEvent(CEvent& event, UInt32& dataID)
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{
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// peek at messages first. waiting for QS_ALLINPUT will return
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// if a message has been sent to our window but GetMessage will
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// dispatch that message behind our backs and block. PeekMessage
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// will also dispatch behind our backs but won't block.
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if (!PeekMessage(&m_event, NULL, 0, 0, PM_NOREMOVE) &&
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!PeekMessage(&m_event, (HWND)-1, 0, 0, PM_NOREMOVE)) {
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return kNone;
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}
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// BOOL. yeah, right.
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BOOL result = GetMessage(&m_event, NULL, 0, 0);
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if (result == -1) {
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return kNone;
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}
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else if (result == 0) {
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event = CEvent(CEvent::kQuit);
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return kSystem;
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}
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else if (m_event.message == m_daemonQuit) {
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event = CEvent(CEvent::kQuit);
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return kSystem;
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}
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else if (m_event.message == m_userEvent) {
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dataID = static_cast<UInt32>(m_event.wParam);
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return kUser;
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}
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else {
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event = CEvent(CEvent::kSystem,
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IEventQueue::getSystemTarget(), &m_event);
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return kSystem;
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}
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}
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bool
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CMSWindowsEventQueueBuffer::addEvent(UInt32 dataID)
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{
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return (PostThreadMessage(m_thread, m_userEvent,
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static_cast<WPARAM>(dataID), 0) != 0);
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}
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bool
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CMSWindowsEventQueueBuffer::isEmpty() const
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{
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return (HIWORD(GetQueueStatus(QS_ALLINPUT)) == 0);
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}
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CEventQueueTimer*
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CMSWindowsEventQueueBuffer::newTimer(double, bool) const
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{
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return new CEventQueueTimer;
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}
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void
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CMSWindowsEventQueueBuffer::deleteTimer(CEventQueueTimer* timer) const
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{
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delete timer;
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}
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