| /* |
| * Copyright (C) 2008 Apple Inc. All Rights Reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef NetworkStateNotifier_h |
| #define NetworkStateNotifier_h |
| |
| #include "public/platform/WebConnectionType.h" |
| #include "wtf/FastAllocBase.h" |
| #include "wtf/HashMap.h" |
| #include "wtf/Noncopyable.h" |
| #include "wtf/ThreadingPrimitives.h" |
| #include "wtf/Vector.h" |
| |
| namespace blink { |
| |
| class ExecutionContext; |
| |
| class NetworkStateNotifier { |
| WTF_MAKE_NONCOPYABLE(NetworkStateNotifier); WTF_MAKE_FAST_ALLOCATED; |
| public: |
| class NetworkStateObserver { |
| public: |
| // Will be called on the thread of the context passed in addObserver. |
| virtual void connectionTypeChange(blink::WebConnectionType) = 0; |
| }; |
| |
| NetworkStateNotifier() |
| : m_isOnLine(true) |
| , m_type(blink::ConnectionTypeOther) |
| , m_testUpdatesOnly(false) |
| { |
| } |
| |
| bool onLine() const |
| { |
| MutexLocker locker(m_mutex); |
| return m_isOnLine; |
| } |
| |
| void setOnLine(bool); |
| |
| blink::WebConnectionType connectionType() const |
| { |
| MutexLocker locker(m_mutex); |
| return m_type; |
| } |
| |
| void setWebConnectionType(blink::WebConnectionType); |
| |
| // Must be called on the context's thread. An added observer must be removed |
| // before its ExecutionContext is deleted. It's possible for an observer to |
| // be called twice for the same event if it is first removed and then added |
| // during notification. |
| void addObserver(NetworkStateObserver*, ExecutionContext*); |
| void removeObserver(NetworkStateObserver*, ExecutionContext*); |
| |
| // The following functions are for testing purposes. |
| |
| // When true, setWebConnectionType calls are ignored and only setWebConnectionTypeForTest |
| // can update the connection type. This is used for layout tests (see crbug.com/377736). |
| void setTestUpdatesOnly(bool); |
| // Tests should call this as it will change the type regardless of the value of m_testUpdatesOnly. |
| void setWebConnectionTypeForTest(blink::WebConnectionType); |
| |
| private: |
| struct ObserverList { |
| ObserverList() |
| : iterating(false) |
| { |
| } |
| bool iterating; |
| Vector<NetworkStateObserver*> observers; |
| Vector<size_t> zeroedObservers; // Indices in observers that are 0. |
| }; |
| |
| void setWebConnectionTypeImpl(blink::WebConnectionType); |
| |
| typedef HashMap<ExecutionContext*, OwnPtr<ObserverList> > ObserverListMap; |
| |
| void notifyObserversOnContext(ExecutionContext*, blink::WebConnectionType); |
| |
| ObserverList* lockAndFindObserverList(ExecutionContext*); |
| |
| // Removed observers are nulled out in the list in case the list is being |
| // iterated over. Once done iterating, call this to clean up nulled |
| // observers. |
| void collectZeroedObservers(ObserverList*, ExecutionContext*); |
| |
| mutable Mutex m_mutex; |
| bool m_isOnLine; |
| blink::WebConnectionType m_type; |
| ObserverListMap m_observers; |
| bool m_testUpdatesOnly; |
| }; |
| |
| NetworkStateNotifier& networkStateNotifier(); |
| |
| } // namespace blink |
| |
| #endif // NetworkStateNotifier_h |