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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 {
PowerTracingAgent::PowerTracingAgent() : is_tracing_(false) {
battor_trace_provider_.reset(new BattorPowerTraceProvider());
}
PowerTracingAgent::~PowerTracingAgent() {}
bool PowerTracingAgent::StartTracing() {
// Tracing session already in progress.
if (is_tracing_)
return false;
// TODO(prabhur) Start tracing probably needs to be done in a
// separate thread since it involves talking to the h/w.
// Revisit once battor h/w communication is enabled.
is_tracing_ = battor_trace_provider_->StartTracing();
return is_tracing_;
}
void PowerTracingAgent::StopTracing(const OutputCallback& callback) {
// No tracing session in progress.
if (!is_tracing_)
return;
// Stop tracing & collect logs.
OutputCallback on_stop_power_tracing_done_callback = base::Bind(
&PowerTracingAgent::OnStopTracingDone, base::Unretained(this), callback);
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&PowerTracingAgent::FlushOnThread, base::Unretained(this),
on_stop_power_tracing_done_callback));
}
void PowerTracingAgent::OnStopTracingDone(
const OutputCallback& callback,
const scoped_refptr<base::RefCountedString>& result) {
is_tracing_ = false;
// Pass the serialized events.
callback.Run(result);
}
// static
PowerTracingAgent* PowerTracingAgent::GetInstance() {
return Singleton<PowerTracingAgent>::get();
}
void PowerTracingAgent::FlushOnThread(const OutputCallback& callback) {
// Pass the result to the UI Thread.
// TODO(prabhur) StopTracing & GetLog need to be called on a
// separate thread depending on how BattorPowerTraceProvider is implemented.
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(callback, result));
}
} // namespace content
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