Hang Fix from Debian
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d06dc55021
commit
1ee6238aa1
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@ -17,6 +17,10 @@
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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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#include <fcntl.h>
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#if HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#if HAVE_POLL
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# include <poll.h>
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#else
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@ -29,9 +33,6 @@
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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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//
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@ -55,11 +56,22 @@ CXWindowsEventQueueBuffer::CXWindowsEventQueueBuffer(
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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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// set up for pipe hack
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int result = pipe(m_pipefd);
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assert(result == 0);
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int pipeflags;
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pipeflags = fcntl(m_pipefd[0], F_GETFL);
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fcntl(m_pipefd[0], F_SETFL, pipeflags | O_NONBLOCK);
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pipeflags = fcntl(m_pipefd[1], F_GETFL);
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fcntl(m_pipefd[1], F_SETFL, pipeflags | O_NONBLOCK);
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}
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CXWindowsEventQueueBuffer::~CXWindowsEventQueueBuffer()
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{
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// do nothing
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// release pipe hack resources
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close(m_pipefd[0]);
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close(m_pipefd[1]);
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}
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void
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@ -67,6 +79,11 @@ CXWindowsEventQueueBuffer::waitForEvent(double dtimeout)
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{
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CThread::testCancel();
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// clear out the pipe in preparation for waiting.
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char buf[16];
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read(m_pipefd[0], buf, 15);
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{
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CLock lock(&m_mutex);
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// we're now waiting for events
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@ -75,13 +92,20 @@ CXWindowsEventQueueBuffer::waitForEvent(double dtimeout)
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// push out pending events
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flush();
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}
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// calling flush may have queued up a new event.
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if (!CXWindowsEventQueueBuffer::isEmpty()) {
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CThread::testCancel();
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return;
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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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struct pollfd pfds[2];
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pfds[0].fd = ConnectionNumber(m_display);
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pfds[0].events = POLLIN;
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pfds[1].fd = m_pipefd[0];
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pfds[1].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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int remaining = timeout;
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@ -103,6 +127,14 @@ CXWindowsEventQueueBuffer::waitForEvent(double dtimeout)
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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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FD_SET(m_pipefd[0], &rfds);
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int nfds;
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if (ConnectionNumber(m_display) > m_pipefd[0]) {
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nfds = ConnectionNumber(m_display) + 1;
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}
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else {
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nfds = m_pipefd[0] + 1;
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}
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#endif
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// It's possible that the X server has queued events locally
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// in xlib's event buffer and not pushed on to the fd. Hence we
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@ -119,13 +151,19 @@ CXWindowsEventQueueBuffer::waitForEvent(double dtimeout)
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while( ((dtimeout < 0.0) || (remaining > 0)) && QLength(m_display)==0 && retval==0){
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#if HAVE_POLL
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retval = poll(pfds, 1, TIMEOUT_DELAY); //16ms = 60hz, but we make it > to play nicely with the cpu
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retval = poll(pfds, 2, TIMEOUT_DELAY); //16ms = 60hz, but we make it > to play nicely with the cpu
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if (pfds[1].revents & POLLIN) {
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read(m_pipefd[0], buf, 15);
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}
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#else
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retval = select(ConnectionNumber(m_display) + 1,
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retval = select(nfds,
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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 TIMEOUT_DELAY);
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if (FD_SET(m_pipefd[0], &rfds) {
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read(m_pipefd[0], buf, 15);
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}
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#endif
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remaining-=TIMEOUT_DELAY;
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}
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@ -184,6 +222,11 @@ CXWindowsEventQueueBuffer::addEvent(UInt32 dataID)
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// too.
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if (m_waiting) {
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flush();
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// Send a character through the round-trip pipe to wake a thread
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// that is waiting for a ConnectionNumber() socket to be readable.
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// The flush call can read incoming data from the socket and put
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// it in Xlib's input buffer. That sneaks it past the other thread.
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write(m_pipefd[1], "!", 1);
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}
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return true;
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@ -52,6 +52,7 @@ private:
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XEvent m_event;
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CEventList m_postedEvents;
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bool m_waiting;
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int m_pipefd[2];
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};
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#endif
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