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Added support for using select() instead of poll().

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This commit is contained in:
crs
2002-10-16 22:01:50 +00:00
parent c1797c6867
commit 11e29ff7eb
6 changed files with 301 additions and 157 deletions
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46
lib/platform/CXWindowsScreen.cpp
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@@ -32,7 +32,22 @@
# include <X11/Xutil.h>
#endif
#if UNIX_LIKE
#include <sys/poll.h>
# if HAVE_POLL
# include <sys/poll.h>
# else
# if HAVE_SYS_SELECT_H
# include <sys/select.h>
# endif
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# endif
# if HAVE_SYS_TYPES_H
# include <sys/types.h>
# endif
# if HAVE_UNISTD_H
# include <unistd.h>
# endif
# endif
#endif
//
@@ -240,19 +255,48 @@ CXWindowsScreen::mainLoop()
// use poll() to wait for a message from the X server or for timeout.
// this is a good deal more efficient than polling and sleeping.
#if HAVE_POLL
struct pollfd pfds[1];
pfds[0].fd = ConnectionNumber(m_display);
pfds[0].events = POLLIN;
#endif
while (!m_stop) {
// compute timeout to next timer
#if HAVE_POLL
int timeout = (m_timers.empty() ? -1 :
static_cast<int>(1000.0 * m_timers.top()));
#else
struct timeval timeout;
struct timeval* timeoutPtr;
if (m_timers.empty()) {
timeoutPtr = NULL;
}
else {
timeout.tv_sec = static_cast<int>(m_timers.top());
timeout.tv_usec = static_cast<int>(1.0e+6 *
(m_timers.top() - timeout.tv_sec));
timeoutPtr = &timeout;
}
// initialize file descriptor sets
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(ConnectionNumber(m_display), &rfds);
#endif
// wait for message from X server or for timeout. also check
// if the thread has been cancelled. poll() should return -1
// with EINTR when the thread is cancelled.
m_mutex.unlock();
#if HAVE_POLL
poll(pfds, 1, timeout);
#else
select(ConnectionNumber(m_display) + 1,
SELECT_TYPE_ARG234 &rfds,
SELECT_TYPE_ARG234 NULL,
SELECT_TYPE_ARG234 NULL,
SELECT_TYPE_ARG5 timeoutPtr);
#endif
CThread::testCancel();
m_mutex.lock();