| /* |
| * Copyright (c) 2022 The Khronos Group Inc. |
| * Copyright (c) 2022 Valve Corporation |
| * Copyright (c) 2022 LunarG, Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and/or associated documentation files (the "Materials"), to |
| * deal in the Materials without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Materials, and to permit persons to whom the Materials are |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice(s) and this permission notice shall be included in |
| * all copies or substantial portions of the Materials. |
| * |
| * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| * |
| * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR THE |
| * USE OR OTHER DEALINGS IN THE MATERIALS. |
| * |
| * Author: Charles Giessen <charles@lunarg.com> |
| */ |
| |
| #include <thread> |
| #include <chrono> |
| #include <vector> |
| #include <atomic> |
| |
| #include "vulkan/vulkan.h" |
| |
| static std::atomic_bool is_running; |
| |
| void run_vk_code(int which_func) { |
| while (!is_running) { |
| // busy wait so all threads have a chance to spawn |
| } |
| while (is_running) { |
| switch (which_func) { |
| default: |
| case 0: { |
| VkInstance inst; |
| VkInstanceCreateInfo info{}; |
| vkCreateInstance(&info, nullptr, &inst); |
| break; |
| } |
| case 1: { |
| uint32_t count = 0; |
| vkEnumerateInstanceExtensionProperties(nullptr, &count, nullptr); |
| std::vector<VkExtensionProperties> props(count, VkExtensionProperties{}); |
| vkEnumerateInstanceExtensionProperties(nullptr, &count, props.data()); |
| break; |
| } |
| case 2: { |
| uint32_t count = 0; |
| vkEnumerateInstanceLayerProperties(&count, nullptr); |
| std::vector<VkLayerProperties> layers(count, VkLayerProperties{}); |
| vkEnumerateInstanceLayerProperties(&count, layers.data()); |
| |
| break; |
| } |
| case 3: { |
| uint32_t version = 0; |
| vkEnumerateInstanceVersion(&version); |
| break; |
| } |
| } |
| } |
| } |
| |
| int main() { |
| uint32_t thread_count = 4; |
| is_running = false; |
| std::vector<std::thread> threads; |
| for (uint32_t i = 0; i < thread_count; i++) { |
| threads.emplace_back(run_vk_code, i % 4); |
| } |
| is_running = true; |
| std::this_thread::sleep_for(std::chrono::milliseconds(10)); |
| is_running = false; |
| for (auto& t : threads) { |
| t.join(); |
| } |
| return 0; |
| } |