Experimental parser: merge to r19637

src/zone-allocator.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * 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.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 // OWNER 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 V8_TEST_CCTEST_TRACE_EXTENSION_H_
-#define V8_TEST_CCTEST_TRACE_EXTENSION_H_
+#ifndef V8_ZONE_ALLOCATOR_H_
+#define V8_ZONE_ALLOCATOR_H_
 
-#include "v8.h"
+#include "zone.h"
 
 namespace v8 {
 namespace internal {
 
-class TraceExtension : public v8::Extension {
+template<typename T>
+class zone_allocator {
  public:
-  TraceExtension() : v8::Extension("v8/trace", kSource) { }
-  virtual v8::Handle<v8::FunctionTemplate> GetNativeFunctionTemplate(
-      v8::Isolate* isolate,
-      v8::Handle<v8::String> name);
-  static void Trace(const v8::FunctionCallbackInfo<v8::Value>& args);
-  static void JSTrace(const v8::FunctionCallbackInfo<v8::Value>& args);
-  static void JSEntrySP(const v8::FunctionCallbackInfo<v8::Value>& args);
-  static void JSEntrySPLevel2(const v8::FunctionCallbackInfo<v8::Value>& args);
-  static Address GetJsEntrySp();
-  static void InitTraceEnv(TickSample* sample);
-  static void DoTrace(Address fp);
+  typedef T* pointer;
+  typedef const T* const_pointer;
+  typedef T& reference;
+  typedef const T& const_reference;
+  typedef T value_type;
+  typedef size_t size_type;
+  typedef ptrdiff_t difference_type;
+  template<class O> struct rebind {
+    typedef zone_allocator<O> other;
+  };
+
+  explicit zone_allocator(Zone* zone) throw() : zone_(zone) {}
+  explicit zone_allocator(const zone_allocator& other) throw()
+      : zone_(other.zone_) {}
+  template<typename U> zone_allocator(const zone_allocator<U>& other) throw()
+      : zone_(other.zone_) {}
+  template<typename U> friend class zone_allocator;
+
+  pointer address(reference x) const {return &x;}
+  const_pointer address(const_reference x) const {return &x;}
+
+  pointer allocate(size_type count, const void* hint = 0) {
+    size_t size = count * sizeof(value_type);
+    size = RoundUp(size, kPointerSize);
+    return static_cast<pointer>(zone_->New(size));
+  }
+  void deallocate(pointer p, size_type) { /* noop for Zones */ }
+
+  size_type max_size() const throw() {
+    size_type max = static_cast<size_type>(-1) / sizeof(T);
+    return (max > 0 ? max : 1);
+  }
+  void construct(pointer p, const T& val) {
+    new(static_cast<void*>(p)) T(val);
+  }
+  void destroy(pointer p) { p->~T(); }
+
+  bool operator==(zone_allocator const& other) {
+    return zone_ == other.zone_;
+  }
+  bool operator!=(zone_allocator const& other) {
+    return zone_ != other.zone_;
+  }
+
  private:
-  static Address GetFP(const v8::FunctionCallbackInfo<v8::Value>& args);
-  static const char* kSource;
+  zone_allocator();
+  Zone* zone_;
 };
 
 } }  // namespace v8::internal
 
-#endif
+#endif  // V8_ZONE_ALLOCATOR_H_