Add GSP::GPU::AcquireRight

include/services/gsp_gpu.hpp

@@ -6,11 +6,17 @@
 class GPUService {
 	Handle handle = KernelHandles::GPU;
 	Memory& mem;
+	u32& currentPID; // Process ID of the current process
+
+	// At any point in time only 1 process has privileges to use rendering functions
+	// This is the PID of that process
+	u32 privilegedProcess;
 
 	// Service commands
+	void acquireRight(u32 messagePointer);
 
 public:
-	GPUService(Memory& mem) : mem(mem) {}
+	GPUService(Memory& mem, u32& currentPID) : mem(mem), currentPID(currentPID) {}
 	void reset();
 	void handleSyncRequest(u32 messagePointer);
 };