mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
/*
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* Copyright (C) 2013-2017 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "CollectionScope.h"
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#include <wtf/HashSet.h>
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#include <wtf/Lock.h>
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#include <wtf/Noncopyable.h>
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#include <wtf/PrintStream.h>
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namespace JSC {
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class CodeBlock;
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class Heap;
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class JSCell;
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class VM;
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// CodeBlockSet tracks all CodeBlocks. Every CodeBlock starts out with one
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// reference coming in from GC. The GC is responsible for freeing CodeBlocks
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// once they hasOneRef() and nobody is running code from that CodeBlock.
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class CodeBlockSet {
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WTF_MAKE_FAST_ALLOCATED;
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WTF_MAKE_NONCOPYABLE(CodeBlockSet);
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public:
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CodeBlockSet();
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~CodeBlockSet();
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void mark(const AbstractLocker&, CodeBlock* candidateCodeBlock);
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void clearCurrentlyExecuting();
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bool contains(const AbstractLocker&, void* candidateCodeBlock);
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Lock& getLock() { return m_lock; }
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// This is expected to run only when we're not adding to the set for now. If
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// this needs to run concurrently in the future, we'll need to lock around this.
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bool isCurrentlyExecuting(CodeBlock*);
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// Visits each CodeBlock in the heap until the visitor function returns true
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// to indicate that it is done iterating, or until every CodeBlock has been
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// visited.
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template<typename Functor> void iterate(const Functor&);
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template<typename Functor> void iterate(const AbstractLocker&, const Functor&);
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template<typename Functor> void iterateViaSubspaces(VM&, const Functor&);
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template<typename Functor> void iterateCurrentlyExecuting(const Functor&);
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void dump(PrintStream&) const;
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void add(CodeBlock*);
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void remove(CodeBlock*);
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private:
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HashSet<CodeBlock*> m_codeBlocks;
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HashSet<CodeBlock*> m_currentlyExecuting;
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Lock m_lock;
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};
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} // namespace JSC
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