mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
76 lines
3.1 KiB
C++
76 lines
3.1 KiB
C++
/*
|
|
* Copyright (C) 2017 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
|
|
|
|
namespace JSC {
|
|
|
|
// We track collector phase in order to allow either the collector thread or the mutator thread to
|
|
// jump in and do work. The collector and mutator trade the conn
|
|
// (https://en.wikipedia.org/wiki/Conn_(nautical)) with each other based on who is available to do work,
|
|
// and they use the phase to help each other know what to do once they take the conn.
|
|
//
|
|
// The collector relinquishes the conn whenever it stopTheMutator's and the mutator is running. Then the
|
|
// collector thread goes to sleep.
|
|
//
|
|
// The mutator relinquishes the conn whenever it releaseAccess's. That wakes up the collector thread.
|
|
enum class CollectorPhase : uint8_t {
|
|
// We use this phase when the collector is not running at all. After this state is Begin.
|
|
NotRunning,
|
|
|
|
// This is everything from when the collector begins to when it first yields to the mutator for
|
|
// marking. After this is Fixpoint.
|
|
Begin,
|
|
|
|
// This means that we should try to do some progress with the world stopped. This usually means
|
|
// doing an iteration of MarkingConstraintSet::executeConvergence, but it could also mean marking
|
|
// with the world stopped. After this is either Concurrent or End.
|
|
Fixpoint,
|
|
|
|
// In this state the collector is relying on the parallel helpers and incremental mutator work to
|
|
// make progress. After this is Reloop, once marking stalls.
|
|
Concurrent,
|
|
|
|
// We did some concurrent marking and now we ran out of work. This phase prepares the GC for another
|
|
// Fixpoint. After this is Fixpoint.
|
|
Reloop,
|
|
|
|
// The collector is trying to finish up. After this state is NotRunning.
|
|
End
|
|
};
|
|
|
|
bool worldShouldBeSuspended(CollectorPhase phase);
|
|
|
|
} // namespace JSC
|
|
|
|
namespace WTF {
|
|
|
|
class PrintStream;
|
|
|
|
void printInternal(PrintStream&, JSC::CollectorPhase);
|
|
|
|
} // namespace WTF
|
|
|