Index: base/trace_event/auto_open_close_event.cc |
diff --git a/base/trace_event/auto_open_close_event.cc b/base/trace_event/auto_open_close_event.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..87d6969a00a015b49b4f77f24e6763a59b696bc6 |
--- /dev/null |
+++ b/base/trace_event/auto_open_close_event.cc |
@@ -0,0 +1,54 @@ |
+// 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/auto_open_close_event.h" |
+ |
+#include "base/macros.h" |
+#include "base/time/time.h" |
+#include "base/trace_event/trace_event.h" |
+ |
+namespace base { |
+namespace trace_event { |
+ |
+AutoOpenCloseEvent::AutoOpenCloseEvent(AutoOpenCloseEvent::Type type, |
+ const char* category, const char* event_name): |
+ category_(category), |
+ event_name_(event_name), |
+ weak_factory_(this) { |
+ base::trace_event::TraceLog::GetInstance()->AddAsyncEnabledStateObserver( |
+ weak_factory_.GetWeakPtr()); |
+} |
+ |
+AutoOpenCloseEvent::~AutoOpenCloseEvent() { |
+ DCHECK(thread_checker_.CalledOnValidThread()); |
+ base::trace_event::TraceLog::GetInstance()->RemoveAsyncEnabledStateObserver( |
+ this); |
+} |
+ |
+void AutoOpenCloseEvent::Begin() { |
+ DCHECK(thread_checker_.CalledOnValidThread()); |
+ start_time_ = base::TimeTicks::Now(); |
+ TRACE_EVENT_ASYNC_BEGIN_WITH_TIMESTAMP0( |
+ category_, event_name_, static_cast<void*>(this), |
+ start_time_.ToInternalValue()); |
+} |
+ |
+void AutoOpenCloseEvent::End() { |
+ DCHECK(thread_checker_.CalledOnValidThread()); |
+ TRACE_EVENT_ASYNC_END0(category_, event_name_, static_cast<void*>(this)); |
+ start_time_ = base::TimeTicks(); |
+} |
+ |
+void AutoOpenCloseEvent::OnTraceLogEnabled() { |
+ DCHECK(thread_checker_.CalledOnValidThread()); |
+ if (start_time_.ToInternalValue() != 0) |
+ TRACE_EVENT_ASYNC_BEGIN_WITH_TIMESTAMP0( |
+ category_, event_name_, static_cast<void*>(this), |
+ start_time_.ToInternalValue()); |
+} |
+ |
+void AutoOpenCloseEvent::OnTraceLogDisabled() {} |
+ |
+} // namespace trace_event |
+} // namespace base |