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// Copyright 2014 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 SHILL_DEVICE_CLAIMER_H_
#define SHILL_DEVICE_CLAIMER_H_
#include <set>
#include <string>
#include "shill/dbus_manager.h"
#include "shill/error.h"
namespace shill {
class DeviceInfo;
// Provide an abstraction for remote service to claim/release devices
// from/to shill. When the DBus service name is provided, which means that
// the remote service is a DBus endpoint, Shill will perform DBus monitoring
// on that service, and revert all operations performed by that service when
// it disappears.
class DeviceClaimer {
public:
DeviceClaimer(
const std::string& dbus_service_name,
DeviceInfo* device_info,
bool default_claimer);
virtual ~DeviceClaimer();
virtual bool StartDBusNameWatcher(
DBusManager* dbus_manager,
const DBusNameWatcher::NameAppearedCallback& name_appeared_callback,
const DBusNameWatcher::NameVanishedCallback& name_vanished_callback);
virtual bool Claim(const std::string& device_name, Error* error);
virtual bool Release(const std::string& device_name, Error* error);
// Return true if there are devices claimed by this claimer, false
// otherwise.
virtual bool DevicesClaimed();
// Return true if the specified device is released by this claimer, false
// otherwise.
virtual bool IsDeviceReleased(const std::string& device_name);
const std::string& name() const { return dbus_service_name_; }
const std::string& owner() const { return dbus_service_owner_; }
void set_owner(const std::string& dbus_service_owner) {
dbus_service_owner_ = dbus_service_owner;
}
virtual bool default_claimer() const { return default_claimer_; }
const std::set<std::string>& claimed_device_names() const {
return claimed_device_names_;
}
private:
// DBus name watcher for monitoring the DBus service of the claimer.
std::unique_ptr<DBusNameWatcher> dbus_name_watcher_;
// The name of devices that have been claimed by this claimer.
std::set<std::string> claimed_device_names_;
// The name of devices that have been released by this claimer.
std::set<std::string> released_device_names_;
// DBus service name of the claimer.
std::string dbus_service_name_;
// DBus service owner name of the claimer.
std::string dbus_service_owner_;
DeviceInfo* device_info_;
// Flag indicating if this is the default claimer. When set to true, this
// claimer will only be deleted when shill terminates.
bool default_claimer_;
DISALLOW_COPY_AND_ASSIGN(DeviceClaimer);
};
} // namespace shill
#endif // SHILL_DEVICE_CLAIMER_H_