third_party/WebKit/Source/platform/PlatformInstrumentation.h

   1 /*
   2  * Copyright (C) 2012 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #ifndef PlatformInstrumentation_h
  32 #define PlatformInstrumentation_h
  33
  34 #include "platform/PlatformExport.h"
  35 #include "platform/TraceEvent.h"
  36 #include "wtf/MainThread.h"
  37 #include "wtf/text/WTFString.h"
  38
  39 namespace blink {
  40
  41 class PLATFORM_EXPORT PlatformInstrumentation {
  42 public:
  43     class LazyPixelRefTracker: TraceEvent::TraceScopedTrackableObject<void*> {
  44     public:
  45         LazyPixelRefTracker(void* instance)
  46             : TraceEvent::TraceScopedTrackableObject<void*>(CategoryName, LazyPixelRef, instance)
  47         {
  48         }
  49     };
  50
  51     static const char ImageDecodeEvent[];
  52     static const char ImageResizeEvent[];
  53     static const char DrawLazyPixelRefEvent[];
  54     static const char DecodeLazyPixelRefEvent[];
  55
  56     static const char ImageTypeArgument[];
  57     static const char CachedArgument[];
  58
  59     static const char LazyPixelRef[];
  60
  61     static void willDecodeImage(const String& imageType);
  62     static void didDecodeImage();
  63     static void didDrawLazyPixelRef(unsigned long long lazyPixelRefId);
  64     static void willDecodeLazyPixelRef(unsigned long long lazyPixelRefId);
  65     static void didDecodeLazyPixelRef();
  66
  67 private:
  68     static const char CategoryName[];
  69 };
  70
  71 inline void PlatformInstrumentation::willDecodeImage(const String& imageType)
  72 {
  73     TRACE_EVENT_BEGIN1(CategoryName, ImageDecodeEvent, ImageTypeArgument, imageType.ascii());
  74 }
  75
  76 inline void PlatformInstrumentation::didDecodeImage()
  77 {
  78     TRACE_EVENT_END0(CategoryName, ImageDecodeEvent);
  79 }
  80
  81 inline void PlatformInstrumentation::didDrawLazyPixelRef(unsigned long long lazyPixelRefId)
  82 {
  83     TRACE_EVENT_INSTANT1(CategoryName, DrawLazyPixelRefEvent, TRACE_EVENT_SCOPE_THREAD, LazyPixelRef, lazyPixelRefId);
  84 }
  85
  86 inline void PlatformInstrumentation::willDecodeLazyPixelRef(unsigned long long lazyPixelRefId)
  87 {
  88     TRACE_EVENT_BEGIN1(CategoryName, DecodeLazyPixelRefEvent, LazyPixelRef, lazyPixelRefId);
  89 }
  90
  91 inline void PlatformInstrumentation::didDecodeLazyPixelRef()
  92 {
  93     TRACE_EVENT_END0(CategoryName, DecodeLazyPixelRefEvent);
  94 }
  95
  96 } // namespace blink
  97
  98 #endif // PlatformInstrumentation_h