Refactor ScriptData class for cached compile data.

src/compiler.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_H_
 #define V8_COMPILER_H_
 
 #include "src/allocation.h"
 #include "src/ast.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 
 class AstValueFactory;
-class ScriptData;
 class HydrogenCodeStub;
 
 // ParseRestriction is used to restrict the set of valid statements in a
 // unit of compilation.  Restriction violations cause a syntax error.
 enum ParseRestriction {
   NO_PARSE_RESTRICTION,         // All expressions are allowed.
   ONLY_SINGLE_FUNCTION_LITERAL  // Only a single FunctionLiteral expression.
 };
 
 enum CachedDataMode {
   NO_CACHED_DATA,
   CONSUME_CACHED_DATA,
   PRODUCE_CACHED_DATA
 };
 
 struct OffsetRange {
   OffsetRange(int from, int to) : from(from), to(to) {}
   int from;
   int to;
 };
 
+
+class ScriptData {
+ public:
+  ScriptData(const byte* data, int length);
+  ~ScriptData() {
+    if (owns_data_) DeleteArray(data_);
+  }
+
+  const byte* data() const { return data_; }
+  int length() const { return length_; }
+
+  void AcquireDataOwnership() {
+    ASSERT(!owns_data_);
+    owns_data_ = true;
+  }
+
+  void ReleaseDataOwnership() {
+    ASSERT(owns_data_);
+    owns_data_ = false;
+  }
+
+ private:
+  bool owns_data_;
+  const byte* data_;
+  int length_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScriptData);
+};
+
+
 // CompilationInfo encapsulates some information known at compile time.  It
 // is constructed based on the resources available at compile-time.
 class CompilationInfo {
  public:
   CompilationInfo(Handle<JSFunction> closure, Zone* zone);
   virtual ~CompilationInfo();
 
   Isolate* isolate() const {
     return isolate_;
   }
@@ skipping 667 matching lines @@
  private:
   const char* name_;
   CompilationInfo* info_;
   Zone zone_;
   unsigned info_zone_start_allocation_size_;
   base::ElapsedTimer timer_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationPhase);
 };
 
-
 } }  // namespace v8::internal
 
 #endif  // V8_COMPILER_H_