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X11: Fix event polling when event fd > 1023
This replaces select with poll for checking for data on event file descriptors, as select cannot handle file descriptors larger than 1023. Closes #2024
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@ -82,6 +82,7 @@ video tutorials.
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- Paul Holden
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- Warren Hu
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- Charles Huber
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- illustris
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- InKryption
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- IntellectualKitty
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- Aaron Jacobs
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@ -268,6 +268,8 @@ information on what to include when reporting a bug.
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- [X11] Bugfix: Icon pixel format conversion worked only by accident, relying on
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undefined behavior (#1986)
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- [X11] Bugfix: Dynamic loading on OpenBSD failed due to soname differences
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- [X11] Bugfix: Waiting for events would fail if file descriptor was too large
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(#2024)
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- [Wayland] Added dynamic loading of all Wayland libraries
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- [Wayland] Added support for key names via xkbcommon
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- [Wayland] Removed support for `wl_shell` (#1443)
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@ -32,7 +32,7 @@
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#include <X11/cursorfont.h>
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#include <X11/Xmd.h>
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#include <sys/select.h>
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#include <poll.h>
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#include <string.h>
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#include <stdio.h>
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@ -57,37 +57,31 @@
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#define _GLFW_XDND_VERSION 5
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// Wait for data to arrive using select
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// Wait for event data to arrive on any relevant file descriptor
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// This avoids blocking other threads via the per-display Xlib lock that also
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// covers GLX functions
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//
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static GLFWbool waitForEvent(double* timeout)
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{
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fd_set fds;
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const int fd = ConnectionNumber(_glfw.x11.display);
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int count = fd + 1;
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#if defined(__linux__)
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if (_glfw.linjs.inotify > fd)
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count = _glfw.linjs.inotify + 1;
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#endif
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for (;;)
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{
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FD_ZERO(&fds);
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FD_SET(fd, &fds);
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nfds_t count = 1;
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struct pollfd fds[2] =
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{
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{ ConnectionNumber(_glfw.x11.display), POLLIN }
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};
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#if defined(__linux__)
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if (_glfw.linjs.inotify > 0)
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FD_SET(_glfw.linjs.inotify, &fds);
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if (_glfw.joysticksInitialized)
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fds[count++] = (struct pollfd) { _glfw.linjs.inotify, POLLIN };
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#endif
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if (timeout)
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{
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const long seconds = (long) *timeout;
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const long microseconds = (long) ((*timeout - seconds) * 1e6);
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struct timeval tv = { seconds, microseconds };
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const int milliseconds = (int) (*timeout * 1e3);
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const uint64_t base = _glfwPlatformGetTimerValue();
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const int result = select(count, &fds, NULL, NULL, &tv);
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const int result = poll(fds, count, milliseconds);
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const int error = errno;
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*timeout -= (_glfwPlatformGetTimerValue() - base) /
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@ -98,7 +92,7 @@ static GLFWbool waitForEvent(double* timeout)
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if ((result == -1 && error == EINTR) || *timeout <= 0.0)
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return GLFW_FALSE;
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}
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else if (select(count, &fds, NULL, NULL, NULL) != -1 || errno != EINTR)
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else if (poll(fds, count, -1) != -1 || errno != EINTR)
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return GLFW_TRUE;
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}
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}
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