97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
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//========================================================================
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// Multithreading test
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// Copyright (c) Camilla Berglund <elmindreda@elmindreda.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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//
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// This test is intended to verify whether the OpenGL context part of
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// the GLFW API is able to be used from multiple threads
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//
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//========================================================================
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#include <GL/glfw3.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include "tinycthread.h"
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static GLboolean running = GL_TRUE;
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static int thread_start(void* data)
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{
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GLFWwindow window = (GLFWwindow) data;
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glfwMakeContextCurrent(window);
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glfwSwapInterval(1);
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while (running)
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{
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const float red = (float) sin(glfwGetTime()) / 2.f + 0.5f;
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glClearColor(red, 0.f, 0.f, 0.f);
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glClear(GL_COLOR_BUFFER_BIT);
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glfwSwapBuffers(window);
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}
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glfwMakeContextCurrent(NULL);
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return 0;
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}
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int main(void)
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{
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int result;
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GLFWwindow window;
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thrd_t thread;
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if (!glfwInit())
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{
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fprintf(stderr, "Failed to initialize GLFW: %s\n", glfwErrorString(glfwGetError()));
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exit(EXIT_FAILURE);
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}
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window = glfwCreateWindow(640, 480, GLFW_WINDOWED, "Multithreading", NULL);
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if (!window)
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{
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fprintf(stderr, "Failed to open GLFW window: %s\n", glfwErrorString(glfwGetError()));
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exit(EXIT_FAILURE);
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}
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if (thrd_create(&thread, thread_start, window) == thrd_success)
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{
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while (!glfwGetWindowParam(window, GLFW_CLOSE_REQUESTED))
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glfwPollEvents();
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running = GL_FALSE;
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thrd_join(thread, &result);
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}
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else
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{
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fprintf(stderr, "Failed to create secondary thread\n");
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exit(EXIT_FAILURE);
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}
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exit(EXIT_SUCCESS);
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}
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