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vk_resource_manager: Implement VKFenceWatch
A fence watch is used to keep track of the usage of a fence and protect a resource or set of resources without having to inherit from their handlers.
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@ -3,6 +3,7 @@
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// Refer to the license.txt file included.
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#include <algorithm>
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#include "common/assert.h"
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#include "video_core/renderer_vulkan/declarations.h"
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#include "video_core/renderer_vulkan/vk_device.h"
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#include "video_core/renderer_vulkan/vk_resource_manager.h"
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@ -79,4 +80,41 @@ void VKFence::Unprotect(const VKResource* resource) {
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}
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}
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VKFenceWatch::VKFenceWatch() = default;
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VKFenceWatch::~VKFenceWatch() {
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if (fence) {
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fence->Unprotect(this);
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}
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}
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void VKFenceWatch::Wait() {
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if (!fence) {
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return;
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}
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fence->Wait();
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fence->Unprotect(this);
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fence = nullptr;
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}
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void VKFenceWatch::Watch(VKFence& new_fence) {
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Wait();
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fence = &new_fence;
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fence->Protect(this);
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}
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bool VKFenceWatch::TryWatch(VKFence& new_fence) {
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if (fence) {
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return false;
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}
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fence = &new_fence;
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fence->Protect(this);
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return true;
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}
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void VKFenceWatch::OnFenceRemoval(VKFence* signaling_fence) {
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ASSERT_MSG(signaling_fence == fence, "Removing the wrong fence");
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fence = nullptr;
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}
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} // namespace Vulkan
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@ -86,4 +86,34 @@ private:
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bool is_used = false; ///< The fence has been commited but it has not been checked to be free.
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};
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/**
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* A fence watch is used to keep track of the usage of a fence and protect a resource or set of
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* resources without having to inherit VKResource from their handlers.
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*/
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class VKFenceWatch final : public VKResource {
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public:
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explicit VKFenceWatch();
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~VKFenceWatch();
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/// Waits for the fence to be released.
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void Wait();
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/**
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* Waits for a previous fence and watches a new one.
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* @param new_fence New fence to wait to.
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*/
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void Watch(VKFence& new_fence);
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/**
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* Checks if it's currently being watched and starts watching it if it's available.
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* @returns True if a watch has started, false if it's being watched.
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*/
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bool TryWatch(VKFence& new_fence);
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void OnFenceRemoval(VKFence* signaling_fence) override;
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private:
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VKFence* fence{}; ///< Fence watching this resource. nullptr when the watch is free.
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};
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} // namespace Vulkan
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