SkTime::GetNSecs()

tools/timer/Timer.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef Timer_DEFINED
 #define Timer_DEFINED
 
+#include "SkString.h"
+#include "SkTime.h"
 #include "SkTypes.h"
-#include "SkString.h"
 
-#if defined(SK_BUILD_FOR_WIN32)
-    #include "SysTimer_windows.h"
-#elif defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
-    #include "SysTimer_mach.h"
-#elif defined(SK_BUILD_FOR_UNIX) || defined(SK_BUILD_FOR_ANDROID)
-    #include "SysTimer_posix.h"
-#endif
-
-#if SK_SUPPORT_GPU
-    #include "GpuTimer.h"
-#endif
-
-class SkGLContext;
-
-/**
- * SysTimers and GpuTimers are implemented orthogonally.
- * This class combines 2 SysTimers and a GpuTimer into one single,
- * platform specific Timer with a simple interface. The truncated
- * timer doesn't include the time required for the GPU to finish
- * its rendering. It should always be <= the un-truncated system
- * times and (for GPU configurations) can be used to roughly (very
- * roughly) gauge the GPU load/backlog.
- */
-class Timer {
-public:
-    explicit Timer(SkGLContext* gl = nullptr);
-
-    void start();
-    void truncatedEnd();
-    void end();
-
-    // All times in milliseconds.
-    double fCpu;
-    double fWall;
-    double fTruncatedCpu;
-    double fTruncatedWall;
-    double fGpu;
-
-private:
-    SysTimer fSysTimer;
-    SysTimer fTruncatedSysTimer;
-#if SK_SUPPORT_GPU
-    GpuTimer fGpuTimer;
-#endif
-};
-
-// Same as Timer above, supporting only fWall but with much lower overhead.
-// (Typically, ~30ns instead of Timer's ~1us.)
 class WallTimer {
 public:
-    WallTimer();
+    WallTimer() : fWall(-1) {}
 
-    void start();
-    void end();
+    void start() { fWall = SkTime::GetNSecs(); }
+    void end()   { fWall = (SkTime::GetNSecs() - fWall) * 1e-6; }
 
     double fWall;  // Milliseconds.
-
-private:
-    SysTimer fSysTimer;
 };
 
 SkString HumanizeMs(double);
 
 #endif