Wayland: Add a timerfd for animated cursors

src/wl_init.c

@@ -1068,6 +1068,7 @@ int _glfwPlatformInit(void)
         }
         _glfw.wl.cursorSurface =
             wl_compositor_create_surface(_glfw.wl.compositor);
+        _glfw.wl.cursorTimerfd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC);
     }
 
     return GLFW_TRUE;
@@ -1145,6 +1146,8 @@ void _glfwPlatformTerminate(void)
 
     if (_glfw.wl.timerfd >= 0)
         close(_glfw.wl.timerfd);
+    if (_glfw.wl.cursorTimerfd >= 0)
+        close(_glfw.wl.cursorTimerfd);
 }
 
 const char* _glfwPlatformGetVersionString(void)

src/wl_platform.h

@@ -241,6 +241,7 @@ typedef struct _GLFWlibraryWayland
 
     struct wl_cursor_theme*     cursorTheme;
     struct wl_surface*          cursorSurface;
+    int                         cursorTimerfd;
     uint32_t                    pointerSerial;
 
     int32_t                     keyboardRepeatRate;

src/wl_window.c

@@ -697,6 +697,7 @@ handleEvents(int timeout)
     struct pollfd fds[] = {
         { wl_display_get_fd(display), POLLIN },
         { _glfw.wl.timerfd, POLLIN },
+        { _glfw.wl.cursorTimerfd, POLLIN },
     };
     ssize_t read_ret;
     uint64_t repeats, i;
@@ -719,7 +720,7 @@ handleEvents(int timeout)
         return;
     }
 
-    if (poll(fds, 2, timeout) > 0)
+    if (poll(fds, 3, timeout) > 0)
     {
         if (fds[0].revents & POLLIN)
         {
@@ -742,6 +743,15 @@ handleEvents(int timeout)
                               _glfw.wl.keyboardLastScancode, GLFW_REPEAT,
                               _glfw.wl.xkb.modifiers);
         }
+
+        if (fds[2].revents & POLLIN)
+        {
+            read_ret = read(_glfw.wl.cursorTimerfd, &repeats, sizeof(repeats));
+            if (read_ret != 8)
+                return;
+
+            // TODO: implement!
+        }
     }
     else
     {