NetworkStateNotifier.h [plain text]
#pragma once
#include <wtf/Forward.h>
#include <wtf/RetainPtr.h>
#include "Timer.h"
#if PLATFORM(IOS)
OBJC_CLASS WebNetworkStateObserver;
#endif
#if PLATFORM(MAC)
typedef const struct __SCDynamicStore * SCDynamicStoreRef;
#endif
#if PLATFORM(WIN)
#include <windows.h>
#endif
namespace WebCore {
class NetworkStateNotifier {
WTF_MAKE_NONCOPYABLE(NetworkStateNotifier);
public:
WEBCORE_EXPORT static NetworkStateNotifier& singleton();
WEBCORE_EXPORT bool onLine();
WEBCORE_EXPORT void addListener(WTF::Function<void(bool isOnLine)>&&);
private:
friend NeverDestroyed<NetworkStateNotifier>;
NetworkStateNotifier();
void updateStateWithoutNotifying();
void updateState();
void updateStateSoon();
void startObserving();
#if PLATFORM(WIN)
void registerForAddressChange();
static void CALLBACK addressChangeCallback(void*, BOOLEAN timedOut);
#endif
#if PLATFORM(GTK) || PLATFORM(WPE)
static void networkChangedCallback(NetworkStateNotifier*);
#endif
std::optional<bool> m_isOnLine;
Vector<WTF::Function<void(bool)>> m_listeners;
Timer m_updateStateTimer;
#if PLATFORM(IOS)
RetainPtr<WebNetworkStateObserver> m_observer;
#endif
#if PLATFORM(MAC)
RetainPtr<SCDynamicStoreRef> m_store;
#endif
#if PLATFORM(WIN)
HANDLE m_waitHandle;
OVERLAPPED m_overlapped;
#endif
};
}