JavaScriptCore-7600.1.4.16.1.tar.gz

[apple/javascriptcore.git] / bytecode / EvalCodeCache.h

diff --git a/bytecode/EvalCodeCache.h b/bytecode/EvalCodeCache.h
index 05834fcbfe24e27e6f11148e16ac471234f2fe71..65deb94f069bcbb380f79141b7ab5f70bf510827 100644 (file)
--- a/bytecode/EvalCodeCache.h
+++ b/bytecode/EvalCodeCache.h
@@ -10,7 +10,7 @@
  * 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.
- * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
  *     its contributors may be used to endorse or promote products derived
  *     from this software without specific prior written permission.
  *
@@ -31,44 +31,50 @@
 
 #include "Executable.h"
 #include "JSGlobalObject.h"
-#include "Nodes.h"
-#include "Parser.h"
 #include "SourceCode.h"
-#include "UString.h"
 #include <wtf/HashMap.h>
 #include <wtf/RefPtr.h>
+#include <wtf/text/StringHash.h>
 
 namespace JSC {
 
+    class SlotVisitor;
+
     class EvalCodeCache {
     public:
-        PassRefPtr<EvalExecutable> get(ExecState* exec, const UString& evalSource, ScopeChainNode* scopeChain, JSValue& exceptionValue)
+        EvalExecutable* tryGet(bool inStrictContext, const String& evalSource, JSScope* scope)
+        {
+            if (!inStrictContext && evalSource.length() < maxCacheableSourceLength && scope->begin()->isVariableObject())
+                return m_cacheMap.get(evalSource.impl()).get();
+            return 0;
+        }
+        
+        EvalExecutable* getSlow(ExecState* exec, ScriptExecutable* owner, bool inStrictContext, const String& evalSource, JSScope* scope)
         {
-            RefPtr<EvalExecutable> evalExecutable;
+            EvalExecutable* evalExecutable = EvalExecutable::create(exec, makeSource(evalSource), inStrictContext);
+            if (!evalExecutable)
+                return 0;
 
-            if (evalSource.size() < maxCacheableSourceLength && (*scopeChain->begin())->isVariableObject())
-                evalExecutable = m_cacheMap.get(evalSource.rep());
+            if (!inStrictContext && evalSource.length() < maxCacheableSourceLength && scope->begin()->isVariableObject() && m_cacheMap.size() < maxCacheEntries)
+                m_cacheMap.set(evalSource.impl(), WriteBarrier<EvalExecutable>(exec->vm(), owner, evalExecutable));
+            
+            return evalExecutable;
+        }
 
-            if (!evalExecutable) {
-                evalExecutable = EvalExecutable::create(exec, makeSource(evalSource));
-                exceptionValue = evalExecutable->compile(exec, scopeChain);
-                if (exceptionValue)
-                    return 0;
+        bool isEmpty() const { return m_cacheMap.isEmpty(); }
 
-                if (evalSource.size() < maxCacheableSourceLength && (*scopeChain->begin())->isVariableObject() && m_cacheMap.size() < maxCacheEntries)
-                    m_cacheMap.set(evalSource.rep(), evalExecutable);
-            }
+        void visitAggregate(SlotVisitor&);
 
-            return evalExecutable.release();
+        void clear()
+        {
+            m_cacheMap.clear();
         }
 
-        bool isEmpty() const { return m_cacheMap.isEmpty(); }
-
     private:
-        static const int maxCacheableSourceLength = 256;
+        static const unsigned maxCacheableSourceLength = 256;
         static const int maxCacheEntries = 64;
 
-        typedef HashMap<RefPtr<UString::Rep>, RefPtr<EvalExecutable> > EvalCacheMap;
+        typedef HashMap<RefPtr<StringImpl>, WriteBarrier<EvalExecutable>> EvalCacheMap;
         EvalCacheMap m_cacheMap;
     };