kc3-lang/angle/src/common/event_tracer.cpp

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• Hash : ae2d8a3a
  Author :
  Date : 2015-04-07T11:21:07
  

  Add Platform methods for event tracing.
  
  Event tracing requires pulling in timing counters, so we can sync
  with Chromium's timestamps. It may require a bit more tricky stuff
  to sync ANGLE's GPU timestamps with trace timestamps, but should
  allow us to add GPU trace events in the future.
  
  BUG=chromium:436191
  BUG=angleproject:966
  
  Change-Id: Ie1dc2981650d96888f988fa74b6fa435fbe8edc2
  Reviewed-on: https://chromium-review.googlesource.com/263781
  Reviewed-by: Brandon Jones <bajones@chromium.org>
  Tested-by: Jamie Madill <jmadill@chromium.org>
  

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• src/common/event_tracer.cpp

• // Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "common/event_tracer.h"
  
  #include "common/debug.h"
  #include "platform/Platform.h"
  
  namespace gl
  {
  
  GetCategoryEnabledFlagFunc g_getCategoryEnabledFlag;
  AddTraceEventFunc g_addTraceEvent;
  
  }  // namespace gl
  
  namespace gl
  {
  
  const unsigned char *TraceGetTraceCategoryEnabledFlag(const char *name)
  {
      angle::Platform *platform = ANGLEPlatformCurrent();
      ASSERT(platform);
  
      // TODO(jmadill): only use platform once it's working
      const unsigned char *categoryEnabledFlag = platform->getTraceCategoryEnabledFlag(name);
      if (categoryEnabledFlag != nullptr)
      {
          return categoryEnabledFlag;
      }
  
      if (g_getCategoryEnabledFlag)
      {
          return g_getCategoryEnabledFlag(name);
      }
      static unsigned char disabled = 0;
      return &disabled;
  }
  
  void TraceAddTraceEvent(char phase, const unsigned char* categoryGroupEnabled, const char* name, unsigned long long id,
                          int numArgs, const char** argNames, const unsigned char* argTypes,
                          const unsigned long long* argValues, unsigned char flags)
  {
      angle::Platform *platform = ANGLEPlatformCurrent();
      ASSERT(platform);
  
      // TODO(jmadill): only use platform once it's working
      double timestamp = platform->monotonicallyIncreasingTime();
  
      if (timestamp != 0)
      {
          angle::Platform::TraceEventHandle handle =
              platform->addTraceEvent(phase,
                                      categoryGroupEnabled,
                                      name,
                                      id,
                                      timestamp,
                                      numArgs,
                                      argNames,
                                      argTypes,
                                      argValues,
                                      flags);
          ASSERT(handle != 0);
          UNUSED_ASSERTION_VARIABLE(handle);
      }
      else if (g_addTraceEvent)
      {
          g_addTraceEvent(phase, categoryGroupEnabled, name, id, numArgs, argNames, argTypes, argValues, flags);
      }
  }
  
  }  // namespace gl
  

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