C++ (Cpp) semaphore::wait_host Examples

Example #1

File: ste_presentation_surface.cpp Project: ssteinberg/ste

void ste_presentation_surface::present(std::uint32_t image_index,
									   const vk::vk_queue<> &presentation_queue,
									   const semaphore &wait_semaphore) {
	VkSwapchainKHR swapchain = *swap_chain;
	VkSemaphore semaphore_handle = wait_semaphore;

	VkPresentInfoKHR info = {};
	info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
	info.pNext = nullptr;
	info.waitSemaphoreCount = 1;
	info.pWaitSemaphores = &semaphore_handle;
	info.swapchainCount = 1;
	info.pSwapchains = &swapchain;
	info.pImageIndices = &image_index;
	info.pResults = nullptr;

	// Host wait for semaphore
	wait_semaphore.wait_host();

	vk::vk_result res;
	{
		//		std::unique_lock<std::mutex> l(shared_data.swap_chain_guard);
		res = vkQueuePresentKHR(presentation_queue, &info);
	}

	// Raise flag to recreate swap-chain
	if (res != VK_SUCCESS)
		shared_data.swap_chain_optimal_flag.clear(std::memory_order_release);
	if (res != VK_SUCCESS && res != VK_SUBOPTIMAL_KHR && res != VK_ERROR_OUT_OF_DATE_KHR) {
		throw vk::vk_exception(res);
	}
}