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// Copyright 2020 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef HERMES_CONTEXT_H_
#define HERMES_CONTEXT_H_
#include <dbus/bus.h>
#include <google-lpa/lpa/core/lpa.h>
namespace hermes {
class Executor;
// Top-level context singleton for access to common context like google-lpa Lpa
// instance and D-Bus bus.
//
// This should be the sole implicit dependency for classes in Hermes.
class Context {
public:
// Initializes Context singleton. Must only be invoked once, and must be
// invoked prior to clients calling Get().
static void Initialize(const scoped_refptr<dbus::Bus>& bus,
lpa::core::Lpa* lpa,
Executor* executor);
// Returns initialized Context singleton. Initialize() must have been invoked
// prior to calls to this.
static Context* Get() {
CHECK(context_);
return context_;
}
const scoped_refptr<dbus::Bus>& bus() { return bus_; }
lpa::core::Lpa* lpa() { return lpa_; }
Executor* executor() { return executor_; }
private:
Context(const scoped_refptr<dbus::Bus>& bus,
lpa::core::Lpa* lpa,
Executor* executor);
static Context* context_;
scoped_refptr<dbus::Bus> bus_;
lpa::core::Lpa* lpa_;
Executor* executor_;
DISALLOW_COPY_AND_ASSIGN(Context);
};
} // namespace hermes
#endif // HERMES_CONTEXT_H_