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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ASH_DBUS_ARC_TRACING_SERVICE_PROVIDER_H_
#define CHROME_BROWSER_ASH_DBUS_ARC_TRACING_SERVICE_PROVIDER_H_
#include <deque>
#include <string>
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "chromeos/ash/components/dbus/services/cros_dbus_service.h"
#include "dbus/exported_object.h"
#include "mojo/public/cpp/system/handle.h"
namespace dbus {
class MethodCall;
} // namespace dbus
namespace arc {
class OverviewTracingHandler;
struct OverviewTracingResult;
} // namespace arc
namespace ash {
// This class exports a D-Bus method that libvda will call to establish a
// mojo pipe to the VideoAcceleratorFactory interface.
class ArcTracingServiceProvider
: public CrosDBusService::ServiceProviderInterface {
public:
ArcTracingServiceProvider();
ArcTracingServiceProvider(const ArcTracingServiceProvider&) = delete;
ArcTracingServiceProvider& operator=(const ArcTracingServiceProvider&) =
delete;
~ArcTracingServiceProvider() override;
void set_trace_outdir_for_testing(const base::FilePath& trace_outdir) {
trace_outdir_ = trace_outdir;
}
// CrosDBusService::ServiceProviderInterface:
void Start(scoped_refptr<dbus::ExportedObject> exported_object) override;
private:
// Adds a message to the circular log buffer, possibly removing the oldest
// entry.
void AddStatusMessage(std::string_view status);
// Called from ExportedObject when a handler is exported as a D-Bus
// method or failed to be exported.
void OnExported(const std::string& interface_name,
const std::string& method_name,
bool success);
void OnTraceEnd(std::unique_ptr<arc::OverviewTracingResult> result);
void StartTrace(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender);
// Supplies a new tracing handler for a trace that is just about to begin.
// Virtual so that tests can supply a testable subclass.
virtual std::unique_ptr<arc::OverviewTracingHandler> NewHandler();
// Responds with (Gets) the messages in the circular log buffer, oldest first.
void GetStatus(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender);
// This is only present if a trace is running.
std::unique_ptr<arc::OverviewTracingHandler> handler_;
// The last few status messages.
std::deque<std::string> msgs_;
// Where finished traces are saved.
base::FilePath trace_outdir_{"/tmp"};
// Keep this last so that all weak pointers will be invalidated at the
// beginning of destruction.
base::WeakPtrFactory<ArcTracingServiceProvider> weak_ptr_factory_{this};
};
} // namespace ash
#endif // CHROME_BROWSER_ASH_DBUS_ARC_TRACING_SERVICE_PROVIDER_H_
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