Index: base/trace_event/persistent_async_event.cc |
diff --git a/base/trace_event/persistent_async_event.cc b/base/trace_event/persistent_async_event.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..3ec08ffc0f38daf3468d155ab77215d4ce045975 |
--- /dev/null |
+++ b/base/trace_event/persistent_async_event.cc |
@@ -0,0 +1,47 @@ |
+// Copyright 2016 The Chromium 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 "base/trace_event/persistent_async_event.h" |
+ |
+#include "base/macros.h" |
+#include "base/time/time.h" |
+#include "base/trace_event/trace_event.h" |
+ |
+namespace base { |
+ |
+namespace trace_event { |
+ |
+PersistentAsyncEvent::PersistentAsyncEvent() : active_(false) { |
+ id_ = static_cast<void*>(this); |
+ base::trace_event::TraceLog::GetInstance()->AddEnabledStateObserver(this); |
+} |
+ |
+PersistentAsyncEvent::~PersistentAsyncEvent() { |
+ base::trace_event::TraceLog::GetInstance()->RemoveEnabledStateObserver(this); |
+} |
+ |
+void PersistentAsyncEvent::Begin() { |
+ RecordBeginEvent(); |
+ active_ = true; |
+ start_time_ = base::TimeTicks::Now(); |
+} |
+ |
+void PersistentAsyncEvent::End() { |
+ RecordEndEvent(); |
+ active_ = false; |
+} |
+ |
+void PersistentAsyncEvent::OnTraceLogEnabled() { |
+ if (active_) |
+ RecordBeginEventWithTimestamp(start_time_); |
+} |
+ |
+void PersistentAsyncEvent::OnTraceLogDisabled() { |
fmeawad
2016/09/02 19:43:25
I think we decided that we are going to leave the
benjhayden
2016/09/02 20:57:45
Fadi, the latest patch changes TraceLog::SetDisabl
|
+ // TODO(alexandermont): How do we call RecordStopEvent before log disabled? |
+ if (active_) |
+ RecordEndEvent(); |
+} |
+ |
+} // namespace trace_event |
+} // namespace base |