JavaScriptCore-1218.tar.gz

[apple/javascriptcore.git] / dfg / DFGByteCodeCache.h

diff --git a/dfg/DFGByteCodeCache.h b/dfg/DFGByteCodeCache.h
deleted file mode 100644 (file)
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--- a/dfg/DFGByteCodeCache.h
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@@ -1,185 +0,0 @@
-/*
- * Copyright (C) 2011 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 DFGByteCodeCache_h
-#define DFGByteCodeCache_h
-
-#include <wtf/Platform.h>
-
-#if ENABLE(DFG_JIT)
-
-#include "CodeBlock.h"
-#include "Executable.h"
-#include "JSFunction.h"
-#include <wtf/HashMap.h>
-
-namespace JSC { namespace DFG {
-
-class CodeBlockKey {
-public:
-    CodeBlockKey()
-        : m_executable(0)
-        , m_kind(CodeForCall) // CodeForCall = empty value
-    {
-    }
-    
-    CodeBlockKey(WTF::HashTableDeletedValueType)
-        : m_executable(0)
-        , m_kind(CodeForConstruct) // CodeForConstruct = deleted value
-    {
-    }
-    
-    CodeBlockKey(FunctionExecutable* executable, CodeSpecializationKind kind)
-        : m_executable(executable)
-        , m_kind(kind)
-    {
-    }
-    
-    bool operator==(const CodeBlockKey& other) const
-    {
-        return m_executable == other.m_executable
-            && m_kind == other.m_kind;
-    }
-    
-    unsigned hash() const
-    {
-        return WTF::PtrHash<FunctionExecutable*>::hash(m_executable) ^ static_cast<unsigned>(m_kind);
-    }
-    
-    FunctionExecutable* executable() const { return m_executable; }
-    CodeSpecializationKind kind() const { return m_kind; }
-
-    bool isHashTableDeletedValue() const
-    {
-        return !m_executable && m_kind == CodeForConstruct;
-    }
-
-private:
-    FunctionExecutable* m_executable;
-    CodeSpecializationKind m_kind;
-};
-
-struct CodeBlockKeyHash {
-    static unsigned hash(const CodeBlockKey& key) { return key.hash(); }
-    static bool equal(const CodeBlockKey& a, const CodeBlockKey& b) { return a == b; }
-    
-    static const bool safeToCompareToEmptyOrDeleted = true;
-};
-
-} } // namespace JSC::DFG
-
-namespace WTF {
-
-template<typename T> struct DefaultHash;
-template<> struct DefaultHash<JSC::DFG::CodeBlockKey> {
-    typedef JSC::DFG::CodeBlockKeyHash Hash;
-};
-
-template<typename T> struct HashTraits;
-template<> struct HashTraits<JSC::DFG::CodeBlockKey> : SimpleClassHashTraits<JSC::DFG::CodeBlockKey> { };
-
-} // namespace WTF
-
-namespace JSC { namespace DFG {
-
-struct ByteCodeCacheValue {
-    FunctionCodeBlock* codeBlock;
-    bool owned;
-    bool oldValueOfShouldDiscardBytecode;
-    
-    // All uses of this struct initialize everything manually. But gcc isn't
-    // smart enough to see that, so this constructor is just here to make the
-    // compiler happy.
-    ByteCodeCacheValue()
-        : codeBlock(0)
-        , owned(false)
-        , oldValueOfShouldDiscardBytecode(false)
-    {
-    }
-};
-
-template<bool (*filterFunction)(CodeBlock*, CodeSpecializationKind)>
-class ByteCodeCache {
-public:
-    typedef HashMap<CodeBlockKey, ByteCodeCacheValue> Map;
-    
-    ByteCodeCache() { }
-    
-    ~ByteCodeCache()
-    {
-        Map::iterator begin = m_map.begin();
-        Map::iterator end = m_map.end();
-        for (Map::iterator iter = begin; iter != end; ++iter) {
-            if (!iter->second.codeBlock)
-                continue;
-            if (iter->second.owned) {
-                delete iter->second.codeBlock;
-                continue;
-            }
-        }
-    }
-    
-    CodeBlock* get(const CodeBlockKey& key, ScopeChainNode* scope)
-    {
-        Map::iterator iter = m_map.find(key);
-        if (iter != m_map.end())
-            return iter->second.codeBlock;
-        
-        ByteCodeCacheValue value;
-        
-        // First see if there is already a parsed code block that still has some
-        // bytecode in it.
-        value.codeBlock = key.executable()->codeBlockWithBytecodeFor(key.kind());
-        if (value.codeBlock) {
-            value.owned = false;
-        } else {
-            // Nope, so try to parse one.
-            JSObject* exception;
-            value.owned = true;
-            value.codeBlock = key.executable()->produceCodeBlockFor(scope, OptimizingCompilation, key.kind(), exception).leakPtr();
-        }
-        
-        // Check if there is any reason to reject this from our cache. If so, then
-        // poison it.
-        if (!!value.codeBlock && !filterFunction(value.codeBlock, key.kind())) {
-            if (value.owned)
-                delete value.codeBlock;
-            value.codeBlock = 0;
-        }
-        
-        m_map.add(key, value);
-        
-        return value.codeBlock;
-    }
-
-private:
-    Map m_map;
-};
-
-} } // namespace JSC::DFG
-
-#endif // ENABLE(DFG_JIT)
-
-#endif // DFGByteCodeCache_h