#include "base/message_loop/message_loop.h"
#include "base/synchronization/condition_variable.h"
#include "base/synchronization/lock.h"
+#include "base/threading/thread_checker.h"
#include "net/base/net_util.h"
#include "net/base/network_change_notifier.h"
public:
typedef std::map<IPAddressNumber, struct ifaddrmsg> AddressMap;
- // Will run |address_callback| when the AddressMap changes, |link_callback|
- // when the list of online links changes, and |tunnel_callback| when the list
- // of online tunnels changes.
+ // Non-tracking version constructor: it takes a snapshot of the
+ // current system configuration. Once Init() returns, the
+ // configuration is available through GetOnlineLinks() and
+ // GetAddressMap().
+ AddressTrackerLinux();
+
+ // Tracking version constructor: it will run |address_callback| when
+ // the AddressMap changes, |link_callback| when the list of online
+ // links changes, and |tunnel_callback| when the list of online
+ // tunnels changes.
AddressTrackerLinux(const base::Closure& address_callback,
const base::Closure& link_callback,
const base::Closure& tunnel_callback);
- virtual ~AddressTrackerLinux();
+ ~AddressTrackerLinux() override;
- // Starts watching system configuration for changes. The current thread must
- // have a MessageLoopForIO.
+ // In tracking mode, it starts watching the system configuration for
+ // changes. The current thread must have a MessageLoopForIO. In
+ // non-tracking mode, once Init() returns, a snapshot of the system
+ // configuration is available through GetOnlineLinks() and
+ // GetAddressMap().
void Init();
AddressMap GetAddressMap() const;
+ // Returns set of interface indicies for online interfaces.
+ base::hash_set<int> GetOnlineLinks() const;
+
// Implementation of NetworkChangeNotifierLinux::GetCurrentConnectionType().
// Safe to call from any thread, but will block until Init() has completed.
NetworkChangeNotifier::ConnectionType GetCurrentConnectionType();
private:
friend class AddressTrackerLinuxTest;
+ // In tracking mode, holds |lock| while alive. In non-tracking mode,
+ // enforces single-threaded access.
+ class AddressTrackerAutoLock {
+ public:
+ AddressTrackerAutoLock(const AddressTrackerLinux& tracker,
+ base::Lock& lock);
+ ~AddressTrackerAutoLock();
+
+ private:
+ const AddressTrackerLinux& tracker_;
+ base::Lock& lock_;
+ DISALLOW_COPY_AND_ASSIGN(AddressTrackerAutoLock);
+ };
+
// A function that returns the name of an interface given the interface index
// in |interface_index|.
typedef const char* (*GetInterfaceNameFunction)(int interface_index);
void AbortAndForceOnline();
// MessageLoopForIO::Watcher:
- virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE;
- virtual void OnFileCanWriteWithoutBlocking(int /* fd */) OVERRIDE;
+ void OnFileCanReadWithoutBlocking(int fd) override;
+ void OnFileCanWriteWithoutBlocking(int /* fd */) override;
// Close |netlink_fd_|
void CloseSocket();
AddressMap address_map_;
// Set of interface indices for links that are currently online.
+ mutable base::Lock online_links_lock_;
base::hash_set<int> online_links_;
base::Lock is_offline_lock_;
bool is_offline_;
bool is_offline_initialized_;
base::ConditionVariable is_offline_initialized_cv_;
+ bool tracking_;
+
+ // Used to verify single-threaded access in non-tracking mode.
+ base::ThreadChecker thread_checker_;
};
} // namespace internal