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52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/trace_event/auto_open_close_event.h"
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#include "base/macros.h"
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#include "base/time/time.h"
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#include "base/trace_event/trace_event.h"
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namespace base {
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namespace trace_event {
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AutoOpenCloseEvent::AutoOpenCloseEvent(AutoOpenCloseEvent::Type type,
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const char* category, const char* event_name):
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category_(category),
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event_name_(event_name),
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weak_factory_(this) {
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base::trace_event::TraceLog::GetInstance()->AddAsyncEnabledStateObserver(
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weak_factory_.GetWeakPtr());
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}
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AutoOpenCloseEvent::~AutoOpenCloseEvent() {
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DCHECK(thread_checker_.CalledOnValidThread());
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base::trace_event::TraceLog::GetInstance()->RemoveAsyncEnabledStateObserver(
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this);
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}
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void AutoOpenCloseEvent::Begin() {
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DCHECK(thread_checker_.CalledOnValidThread());
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start_time_ = base::TimeTicks::Now();
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TRACE_EVENT_ASYNC_BEGIN_WITH_TIMESTAMP0(
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category_, event_name_, static_cast<void*>(this), start_time_);
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}
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void AutoOpenCloseEvent::End() {
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DCHECK(thread_checker_.CalledOnValidThread());
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TRACE_EVENT_ASYNC_END0(category_, event_name_, static_cast<void*>(this));
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start_time_ = base::TimeTicks();
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}
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void AutoOpenCloseEvent::OnTraceLogEnabled() {
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DCHECK(thread_checker_.CalledOnValidThread());
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if (start_time_.ToInternalValue() != 0)
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TRACE_EVENT_ASYNC_BEGIN_WITH_TIMESTAMP0(
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category_, event_name_, static_cast<void*>(this), start_time_);
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}
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void AutoOpenCloseEvent::OnTraceLogDisabled() {}
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} // namespace trace_event
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} // namespace base
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