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/*
* Copyright (C) 2014-2019 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.
*/
#pragma once
#include <wtf/CompletionHandler.h>
#include <wtf/Function.h>
#include <wtf/ProcessID.h>
#include <wtf/ThreadSafeWeakPtr.h>
#include <wtf/text/WTFString.h>
#if !OS(WINDOWS)
#include <unistd.h>
#endif
#if USE(RUNNINGBOARD)
#include <wtf/RetainPtr.h>
OBJC_CLASS RBSAssertion;
OBJC_CLASS WKRBSAssertionDelegate;
#endif // USE(RUNNINGBOARD)
namespace WebKit {
enum class ProcessAssertionType : uint8_t {
NearSuspended,
Background,
UnboundedNetworking,
Foreground,
MediaPlayback,
FinishTaskInterruptable,
BoostedJetsam,
};
ASCIILiteral processAssertionTypeDescription(ProcessAssertionType);
class ProcessAssertion : public ThreadSafeRefCountedAndCanMakeThreadSafeWeakPtr<ProcessAssertion> {
WTF_MAKE_FAST_ALLOCATED;
public:
enum class Mode : bool { Sync, Async };
static Ref<ProcessAssertion> create(ProcessID pid, const String& reason, ProcessAssertionType type, Mode mode = Mode::Async, const String& environmentIdentifier = emptyString(), CompletionHandler<void()>&& acquisisionHandler = nullptr)
{
auto assertion = adoptRef(*new ProcessAssertion(pid, reason, type, environmentIdentifier));
if (mode == Mode::Async)
assertion->acquireAsync(WTFMove(acquisisionHandler));
else {
assertion->acquireSync();
if (acquisisionHandler)
acquisisionHandler();
}
return assertion;
}
static double remainingRunTimeInSeconds(ProcessID);
virtual ~ProcessAssertion();
void setPrepareForInvalidationHandler(Function<void()>&& handler) { m_prepareForInvalidationHandler = WTFMove(handler); }
void setInvalidationHandler(Function<void()>&& handler) { m_invalidationHandler = WTFMove(handler); }
ProcessAssertionType type() const { return m_assertionType; }
ProcessID pid() const { return m_pid; }
bool isValid() const;
protected:
ProcessAssertion(ProcessID, const String& reason, ProcessAssertionType, const String& environmentIdentifier);
void acquireAsync(CompletionHandler<void()>&&);
void acquireSync();
#if USE(RUNNINGBOARD)
void processAssertionWillBeInvalidated();
virtual void processAssertionWasInvalidated();
#endif
private:
const ProcessAssertionType m_assertionType;
const ProcessID m_pid;
const String m_reason;
#if USE(RUNNINGBOARD)
RetainPtr<RBSAssertion> m_rbsAssertion;
RetainPtr<WKRBSAssertionDelegate> m_delegate;
bool m_wasInvalidated { false };
#endif
Function<void()> m_prepareForInvalidationHandler;
Function<void()> m_invalidationHandler;
};
class ProcessAndUIAssertion final : public ProcessAssertion {
public:
static Ref<ProcessAndUIAssertion> create(ProcessID pid, const String& reason, ProcessAssertionType type, Mode mode = Mode::Async, const String& environmentIdentifier = emptyString(), CompletionHandler<void()>&& acquisisionHandler = nullptr)
{
auto assertion = adoptRef(*new ProcessAndUIAssertion(pid, reason, type, environmentIdentifier));
if (mode == Mode::Async)
assertion->acquireAsync(WTFMove(acquisisionHandler));
else {
assertion->acquireSync();
if (acquisisionHandler)
acquisisionHandler();
}
return assertion;
}
~ProcessAndUIAssertion();
void uiAssertionWillExpireImminently();
void setUIAssertionExpirationHandler(Function<void()>&& handler) { m_uiAssertionExpirationHandler = WTFMove(handler); }
#if PLATFORM(IOS_FAMILY)
static void setProcessStateMonitorEnabled(bool);
#endif
private:
ProcessAndUIAssertion(ProcessID, const String& reason, ProcessAssertionType, const String& environmentIdentifier);
#if PLATFORM(IOS_FAMILY)
void processAssertionWasInvalidated() final;
#endif
void updateRunInBackgroundCount();
Function<void()> m_uiAssertionExpirationHandler;
bool m_isHoldingBackgroundTask { false };
};
} // namespace WebKit
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