mirror of
https://github.com/debauchee/barrier.git
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166 lines
3.8 KiB
C++
166 lines
3.8 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 "CXWindowsEventQueueBuffer.h"
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#include "CThread.h"
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#include "CEvent.h"
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#include "IEventQueue.h"
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#if UNIX_LIKE
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# if HAVE_POLL
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# include <sys/poll.h>
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# else
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# if HAVE_SYS_SELECT_H
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# include <sys/select.h>
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# endif
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# if HAVE_SYS_TIME_H
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# include <sys/time.h>
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# endif
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# if HAVE_SYS_TYPES_H
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# include <sys/types.h>
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# endif
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# if HAVE_UNISTD_H
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# include <unistd.h>
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# endif
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# endif
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#endif
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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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// CXWindowsEventQueueBuffer
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//
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CXWindowsEventQueueBuffer::CXWindowsEventQueueBuffer(
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Display* display, Window window) :
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m_display(display),
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m_window(window)
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{
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assert(m_display != NULL);
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assert(m_window != None);
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m_userEvent = XInternAtom(m_display, "SYNERGY_USER_EVENT", False);
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}
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CXWindowsEventQueueBuffer::~CXWindowsEventQueueBuffer()
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{
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// do nothing
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}
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void
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CXWindowsEventQueueBuffer::waitForEvent(double dtimeout)
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{
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// use poll() to wait for a message from the X server or for timeout.
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// this is a good deal more efficient than polling and sleeping.
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#if HAVE_POLL
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struct pollfd pfds[1];
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pfds[0].fd = ConnectionNumber(m_display);
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pfds[0].events = POLLIN;
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int timeout = (dtimeout < 0.0) ? -1 :
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static_cast<int>(1000.0 * dtimeout);
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#else
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struct timeval timeout;
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struct timeval* timeoutPtr;
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if (dtimeout < 0.0) {
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timeoutPtr = NULL;
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}
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else {
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timeout.tv_sec = static_cast<int>(dtimeout);
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timeout.tv_usec = static_cast<int>(1.0e+6 *
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(dtimeout - timeout.tv_sec));
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timeoutPtr = &timeout;
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}
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// initialize file descriptor sets
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fd_set rfds;
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FD_ZERO(&rfds);
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FD_SET(ConnectionNumber(m_display), &rfds);
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#endif
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// wait for message from X server or for timeout. also check
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// if the thread has been cancelled. poll() should return -1
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// with EINTR when the thread is cancelled.
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CThread::testCancel();
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#if HAVE_POLL
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poll(pfds, 1, timeout);
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#else
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select(ConnectionNumber(m_display) + 1,
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SELECT_TYPE_ARG234 &rfds,
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SELECT_TYPE_ARG234 NULL,
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SELECT_TYPE_ARG234 NULL,
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SELECT_TYPE_ARG5 timeoutPtr);
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#endif
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CThread::testCancel();
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}
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IEventQueueBuffer::Type
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CXWindowsEventQueueBuffer::getEvent(CEvent& event, UInt32& dataID)
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{
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// get next event
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XNextEvent(m_display, &m_event);
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// process event
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if (m_event.xany.type == ClientMessage &&
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m_event.xclient.message_type == m_userEvent) {
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dataID = static_cast<UInt32>(m_event.xclient.data.l[0]);
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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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CXWindowsEventQueueBuffer::addEvent(UInt32 dataID)
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{
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// send ourself a message
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XEvent xevent;
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xevent.xclient.type = ClientMessage;
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xevent.xclient.window = m_window;
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xevent.xclient.message_type = m_userEvent;
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xevent.xclient.format = 32;
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xevent.xclient.data.l[0] = static_cast<long>(dataID);
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if (XSendEvent(m_display, m_window, False, 0, &xevent) == 0) {
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return false;
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}
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// force waitForEvent() to return
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XFlush(m_display);
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return true;
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}
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bool
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CXWindowsEventQueueBuffer::isEmpty() const
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{
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return (XPending(m_display) == 0);
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}
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CEventQueueTimer*
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CXWindowsEventQueueBuffer::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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CXWindowsEventQueueBuffer::deleteTimer(CEventQueueTimer* timer) const
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{
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delete timer;
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}
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