refactor(graphics): split renderer and recompiler into focused modules

src/graphics/host_gpu/renderer/cache/resourceMutex.h

@@ -0,0 +1,48 @@
+#ifndef EMULATOR_SRC_GRAPHICS_HOST_GPU_RENDERER_RESOURCEMUTEX_H_
+#define EMULATOR_SRC_GRAPHICS_HOST_GPU_RENDERER_RESOURCEMUTEX_H_
+
+#include "common/common.h"
+
+#include <mutex>
+#include <thread>
+
+namespace Libs::Graphics {
+
+// Owner-tracked shared buffer/image transaction. External faults pause GPU submissions first;
+// command-processor faults drain pending guest processors before entering this transaction.
+class ResourceMutex final {
+public:
+	class FaultScope final {
+	public:
+		explicit FaultScope(ResourceMutex& mutex);
+		~FaultScope();
+		KYTY_CLASS_NO_COPY(FaultScope);
+
+	private:
+		ResourceMutex& m_mutex;
+		bool           m_resource_preowned = false;
+	};
+
+	ResourceMutex() = default;
+	~ResourceMutex();
+	KYTY_CLASS_NO_COPY(ResourceMutex);
+
+	void               lock();
+	void               unlock();
+	[[nodiscard]] bool IsOwnedByCurrentThread();
+
+private:
+	friend class FaultScope;
+
+	[[nodiscard]] bool BeginFault();
+	void               EndFault(bool resource_preowned);
+
+	std::mutex      m_resource;
+	std::mutex      m_state;
+	std::thread::id m_resource_owner;
+	std::thread::id m_fault_owner;
+};
+
+} // namespace Libs::Graphics
+
+#endif // EMULATOR_SRC_GRAPHICS_HOST_GPU_RENDERER_RESOURCEMUTEX_H_