| /* |
| * Copyright (C) 2014 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. AND ITS CONTRIBUTORS ``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 ITS 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 ProcessAssertion_h |
| #define ProcessAssertion_h |
| |
| #include <wtf/Function.h> |
| #include <wtf/ProcessID.h> |
| |
| #if !OS(WINDOWS) |
| #include <unistd.h> |
| #endif |
| |
| #if PLATFORM(IOS) && !PLATFORM(IOS_SIMULATOR) |
| #include <wtf/RetainPtr.h> |
| #include <wtf/WeakPtr.h> |
| OBJC_CLASS BKSProcessAssertion; |
| #endif |
| |
| namespace WebKit { |
| |
| enum class AssertionState { |
| Suspended, |
| Background, |
| Foreground |
| }; |
| |
| class ProcessAssertionClient { |
| public: |
| virtual ~ProcessAssertionClient() { }; |
| virtual void assertionWillExpireImminently() = 0; |
| }; |
| |
| class ProcessAssertion { |
| public: |
| ProcessAssertion(ProcessID, AssertionState, Function<void()>&& invalidationCallback = { }); |
| virtual ~ProcessAssertion(); |
| |
| virtual void setClient(ProcessAssertionClient& client) { m_client = &client; } |
| ProcessAssertionClient* client() { return m_client; } |
| |
| AssertionState state() const { return m_assertionState; } |
| virtual void setState(AssertionState); |
| |
| #if PLATFORM(IOS) && !PLATFORM(IOS_SIMULATOR) |
| protected: |
| enum class Validity { No, Yes, Unset }; |
| Validity validity() const { return m_validity; } |
| #endif |
| |
| private: |
| #if PLATFORM(IOS) && !PLATFORM(IOS_SIMULATOR) |
| WeakPtr<ProcessAssertion> createWeakPtr() { return m_weakFactory.createWeakPtr(*this); } |
| void markAsInvalidated(); |
| |
| RetainPtr<BKSProcessAssertion> m_assertion; |
| Validity m_validity { Validity::Unset }; |
| WeakPtrFactory<ProcessAssertion> m_weakFactory; |
| Function<void()> m_invalidationCallback; |
| #endif |
| AssertionState m_assertionState; |
| ProcessAssertionClient* m_client { nullptr }; |
| }; |
| |
| class ProcessAndUIAssertion final : public ProcessAssertion { |
| public: |
| ProcessAndUIAssertion(ProcessID, AssertionState); |
| ~ProcessAndUIAssertion(); |
| |
| void setClient(ProcessAssertionClient&) final; |
| |
| void setState(AssertionState) final; |
| |
| #if PLATFORM(IOS) && !PLATFORM(IOS_SIMULATOR) |
| private: |
| void updateRunInBackgroundCount(); |
| |
| bool m_isHoldingBackgroundAssertion { false }; |
| #endif |
| }; |
| |
| } |
| |
| #endif // ProcessAssertion_h |