add RAII style profiling (#910)

WickedEngine/wiProfiler.h

@@ -3,6 +3,20 @@
 #include "wiCanvas.h"
 #include "wiColor.h"
 
+
+// QoL macros, allows writing just ScopedXxxProfiling without needing to declare a variable manually
+#define ScopedCPUProfiling(name) wi::profiler::ScopedRangeCPU WI_PROFILER_CONCAT(_wi_profiler_cpu_range,__LINE__)(name)
+#define ScopedGPUProfiling(name, cmd) wi::profiler::ScopedRangeGPU WI_PROFILER_CONCAT(_wi_profiler_gpu_range,__LINE__)(name, cmd)
+
+// same as ScopedXxxProfiling, just will automatically use the function name as name, should only be used at the beginning of a function
+#define ScopedCPUProfilingF ScopedCPUProfiling(__FUNCTION__)
+#define ScopedGPUProfilingF(cmd) ScopedGPUProfiling(__FUNCTION__, cmd)
+
+// internal helper macros to make somewhat unique variable names based on line numbers to prevent some compilers
+// warning about shadowed variables
+#define WI_PROFILER_CONCAT(x,y) WI_PROFILER_CONCAT_INDIRECT(x,y)
+#define WI_PROFILER_CONCAT_INDIRECT(x,y) x##y
+
 namespace wi::profiler
 {
 	typedef size_t range_id;
@@ -22,6 +36,22 @@ namespace wi::profiler
 	// End a profiling range
 	void EndRange(range_id id);
 
+	// helper using RAII to avoid having to manually call BeginRangeCPU/EndRange at beginning/end
+	struct ScopedRangeCPU
+	{
+		range_id id;
+		inline ScopedRangeCPU(const char* name) { id = BeginRangeCPU(name); }
+		inline ~ScopedRangeCPU() { EndRange(id); }
+	};
+
+	// same for BeginRangeGPU
+	struct ScopedRangeGPU
+	{
+		range_id id;
+		inline ScopedRangeGPU(const char* name, wi::graphics::CommandList cmd) { id = BeginRangeGPU(name, cmd); }
+		inline ~ScopedRangeGPU() { EndRange(id); }
+	};
+
 	// Renders a basic text of the Profiling results to the (x,y) screen coordinate
 	void DrawData(
 		const wi::Canvas& canvas,