Added test for posting of empty event.

.gitignore

@@ -53,6 +53,7 @@ tests/*.exe
 tests/accuracy
 tests/clipboard
 tests/defaults
+tests/empty
 tests/events
 tests/fsaa
 tests/gamma

README.md

@@ -47,6 +47,7 @@ The following dependencies are needed by the examples and test programs:
 
  - Added native monitor handle access to native API
  - Added `glfwSetDropCallback` and `GLFWdropfun` for receiving dropped files
+ - Added `empty` test program for verifying posting of empty events
  - Bugfix: The debug context attribute was set from `GL_ARB_debug_output` even
            when a debug context had not been requested
  - Bugfix: The particles example was not linked against the threading library

tests/CMakeLists.txt

@@ -36,6 +36,9 @@ add_executable(reopen reopen.c)
 add_executable(accuracy WIN32 MACOSX_BUNDLE accuracy.c)
 set_target_properties(accuracy PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Accuracy")
 
+add_executable(empty WIN32 MACOSX_BUNDLE empty.c ${TINYCTHREAD})
+set_target_properties(empty PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Empty Event")
+
 add_executable(sharing WIN32 MACOSX_BUNDLE sharing.c)
 set_target_properties(sharing PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Sharing")
 
@@ -51,9 +54,10 @@ set_target_properties(title PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Title")
 add_executable(windows WIN32 MACOSX_BUNDLE windows.c)
 set_target_properties(windows PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Windows")
 
+target_link_libraries(empty ${CMAKE_THREAD_LIBS_INIT} ${RT_LIBRARY})
 target_link_libraries(threads ${CMAKE_THREAD_LIBS_INIT} ${RT_LIBRARY})
 
-set(WINDOWS_BINARIES accuracy sharing tearing threads title windows)
+set(WINDOWS_BINARIES accuracy empty sharing tearing threads title windows)
 set(CONSOLE_BINARIES clipboard defaults events fsaa gamma glfwinfo
                      iconify joysticks modes peter reopen)
 

tests/empty.c

@@ -0,0 +1,129 @@
+//========================================================================
+// Empty event test
+// Copyright (c) Camilla Berglund <elmindreda@elmindreda.org>
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would
+//    be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such, and must not
+//    be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source
+//    distribution.
+//
+//========================================================================
+//
+// This test is intended to verify that posting of empty events works
+//
+//========================================================================
+
+#include "tinycthread.h"
+
+#include <GLFW/glfw3.h>
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static volatile GLboolean running = GL_TRUE;
+
+static void error_callback(int error, const char* description)
+{
+    fprintf(stderr, "Error: %s\n", description);
+}
+
+static int thread_main(void* data)
+{
+    struct timespec time;
+
+    while (running)
+    {
+        clock_gettime(CLOCK_REALTIME, &time);
+        time.tv_sec += 1;
+        thrd_sleep(&time, NULL);
+
+        glfwPostEmptyEvent();
+    }
+
+    return 0;
+}
+
+static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
+{
+    if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
+        glfwSetWindowShouldClose(window, GL_TRUE);
+}
+
+static float nrand(void)
+{
+    return (float) rand() / (float) RAND_MAX;
+}
+
+int main(void)
+{
+    int result;
+    thrd_t thread;
+    GLFWwindow* window;
+
+    srand(time(NULL));
+
+    glfwSetErrorCallback(error_callback);
+
+    if (!glfwInit())
+        exit(EXIT_FAILURE);
+
+    window = glfwCreateWindow(640, 480, "Empty Event Test", NULL, NULL);
+    if (!window)
+    {
+        glfwTerminate();
+        exit(EXIT_FAILURE);
+    }
+
+    glfwMakeContextCurrent(window);
+    glfwSetKeyCallback(window, key_callback);
+
+    if (thrd_create(&thread, thread_main, NULL) != thrd_success)
+    {
+        fprintf(stderr, "Failed to create secondary thread\n");
+
+        glfwTerminate();
+        exit(EXIT_FAILURE);
+    }
+
+    while (running)
+    {
+        int width, height;
+        float r = nrand(), g = nrand(), b = nrand();
+        float l = (float) sqrt(r * r + g * g + b * b);
+
+        glfwGetFramebufferSize(window, &width, &height);
+
+        glViewport(0, 0, width, height);
+        glClearColor(r / l, g / l, b / l, 1.f);
+        glClear(GL_COLOR_BUFFER_BIT);
+        glfwSwapBuffers(window);
+
+        glfwWaitEvents();
+
+        if (glfwWindowShouldClose(window))
+            running = GL_FALSE;
+    }
+
+    glfwHideWindow(window);
+    thrd_join(thread, &result);
+    glfwDestroyWindow(window);
+
+    glfwTerminate();
+    exit(EXIT_SUCCESS);
+}
+