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// Copyright 2015 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/lazy_instance.h"
#include "base/memory/singleton.h"
#include "base/trace_event/trace_event_impl.h"
#include "content/browser/tracing/battor_power_trace_provider.h"
#include "content/browser/tracing/power_tracing_agent.h"
#include "content/public/browser/browser_thread.h"
namespace content {
namespace {
const char kPowerTracingAgentName[] = "battor";
const char kPowerTraceLabel[] = "powerTraceAsString";
} // namespace
// static
PowerTracingAgent* PowerTracingAgent::GetInstance() {
return base::Singleton<PowerTracingAgent>::get();
}
PowerTracingAgent::PowerTracingAgent() : thread_("PowerTracingAgentThread") {
battor_trace_provider_.reset(new BattorPowerTraceProvider());
}
PowerTracingAgent::~PowerTracingAgent() {}
std::string PowerTracingAgent::GetTracingAgentName() {
return kPowerTracingAgentName;
}
std::string PowerTracingAgent::GetTraceEventLabel() {
return kPowerTraceLabel;
}
bool PowerTracingAgent::StartAgentTracing(
const base::trace_event::TraceConfig& trace_config) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// TODO(charliea): When system tracing is enabled in about://tracing, it will
// trigger power tracing. We need a way of checking if BattOr is connected.
// Currently, IsConnected() always returns false, so that we do not include
// BattOr trace until it is hooked up.
if (!battor_trace_provider_->IsConnected())
return false;
thread_.Start();
thread_.task_runner()->PostTask(
FROM_HERE,
base::Bind(&PowerTracingAgent::TraceOnThread, base::Unretained(this)));
return true;
}
void PowerTracingAgent::StopAgentTracing(
const StopAgentTracingCallback& callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK(thread_.IsRunning());
thread_.task_runner()->PostTask(
FROM_HERE,
base::Bind(&PowerTracingAgent::FlushOnThread, base::Unretained(this),
callback));
}
void PowerTracingAgent::OnStopTracingDone(
const StopAgentTracingCallback& callback,
const scoped_refptr<base::RefCountedString>& result) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// Pass the serialized events.
callback.Run(GetTracingAgentName(), GetTraceEventLabel(), result);
// Stop the power tracing agent thread on file thread.
BrowserThread::PostTask(
BrowserThread::FILE, FROM_HERE,
base::Bind(&base::Thread::Stop, base::Unretained(&thread_)));
}
void PowerTracingAgent::TraceOnThread() {
DCHECK(thread_.task_runner()->BelongsToCurrentThread());
battor_trace_provider_->StartTracing();
}
void PowerTracingAgent::FlushOnThread(
const StopAgentTracingCallback& callback) {
DCHECK(thread_.task_runner()->BelongsToCurrentThread());
battor_trace_provider_->StopTracing();
std::string battor_logs;
battor_trace_provider_->GetLog(&battor_logs);
scoped_refptr<base::RefCountedString> result =
base::RefCountedString::TakeString(&battor_logs);
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&PowerTracingAgent::OnStopTracingDone,
base::Unretained(this),
callback,
result));
}
bool PowerTracingAgent::SupportsExplicitClockSync() {
return true;
}
void PowerTracingAgent::RecordClockSyncMarker(
int sync_id,
const RecordClockSyncMarkerCallback& callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK(SupportsExplicitClockSync());
thread_.task_runner()->PostTask(
FROM_HERE,
base::Bind(&PowerTracingAgent::RecordClockSyncMarkerOnThread,
base::Unretained(this),
sync_id,
callback));
}
void PowerTracingAgent::RecordClockSyncMarkerOnThread(
int sync_id,
const RecordClockSyncMarkerCallback& callback) {
DCHECK(thread_.task_runner()->BelongsToCurrentThread());
DCHECK(SupportsExplicitClockSync());
base::TimeTicks issue_ts = base::TimeTicks::Now();
battor_trace_provider_->RecordClockSyncMarker(sync_id);
base::TimeTicks issue_end_ts = base::TimeTicks::Now();
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(callback, sync_id, issue_ts, issue_end_ts));
}
} // namespace content
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