glfw/tests/threads.c
2012-08-12 22:36:10 +02:00

95 lines
2.6 KiB
C

//========================================================================
// Multithreading 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 whether the OpenGL context part of
// the GLFW API is able to be used from multiple threads
//
//========================================================================
#include <GL/glfw3.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "tinycthread.h"
static volatile GLboolean running = GL_TRUE;
static int thread_start(void* data)
{
GLFWwindow window = (GLFWwindow) data;
glfwMakeContextCurrent(window);
glfwSwapInterval(1);
while (running)
{
const float red = (float) sin(glfwGetTime()) / 2.f + 0.5f;
glClearColor(red, 0.f, 0.f, 0.f);
glClear(GL_COLOR_BUFFER_BIT);
glfwSwapBuffers(window);
}
glfwMakeContextCurrent(NULL);
return 0;
}
int main(void)
{
int result;
GLFWwindow window;
thrd_t thread;
if (!glfwInit())
{
fprintf(stderr, "Failed to initialize GLFW: %s\n", glfwErrorString(glfwGetError()));
exit(EXIT_FAILURE);
}
window = glfwCreateWindow(640, 480, GLFW_WINDOWED, "Multithreading", NULL);
if (!window)
{
fprintf(stderr, "Failed to open GLFW window: %s\n", glfwErrorString(glfwGetError()));
exit(EXIT_FAILURE);
}
if (thrd_create(&thread, thread_start, window) != thrd_success)
{
fprintf(stderr, "Failed to create secondary thread\n");
exit(EXIT_FAILURE);
}
while (!glfwGetWindowParam(window, GLFW_CLOSE_REQUESTED))
glfwWaitEvents();
running = GL_FALSE;
thrd_join(thread, &result);
exit(EXIT_SUCCESS);
}