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// Copyright 2013 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_OBJECTS_ALLOCATION_SITE_SCOPES_H_
#define V8_OBJECTS_ALLOCATION_SITE_SCOPES_H_
#include "src/handles/handles.h"
#include "src/objects/allocation-site.h"
#include "src/objects/map.h"
#include "src/objects/objects.h"
namespace v8 {
namespace internal {
// AllocationSiteContext is the base class for walking and copying a nested
// boilerplate with AllocationSite and AllocationMemento support.
class AllocationSiteContext {
public:
explicit AllocationSiteContext(Isolate* isolate) { isolate_ = isolate; }
Handle<AllocationSite> top() { return top_; }
Handle<AllocationSite> current() { return current_; }
bool ShouldCreateMemento(Handle<JSObject> object) { return false; }
Isolate* isolate() { return isolate_; }
protected:
void update_current_site(AllocationSite site) { current_.PatchValue(site); }
inline void InitializeTraversal(Handle<AllocationSite> site);
private:
Isolate* isolate_;
Handle<AllocationSite> top_;
Handle<AllocationSite> current_;
};
// AllocationSiteUsageContext aids in the creation of AllocationMementos placed
// behind some/all components of a copied object literal.
class AllocationSiteUsageContext : public AllocationSiteContext {
public:
AllocationSiteUsageContext(Isolate* isolate, Handle<AllocationSite> site,
bool activated)
: AllocationSiteContext(isolate),
top_site_(site),
activated_(activated) {}
inline Handle<AllocationSite> EnterNewScope();
inline void ExitScope(Handle<AllocationSite> scope_site,
Handle<JSObject> object);
inline bool ShouldCreateMemento(Handle<JSObject> object);
static const bool kCopying = true;
private:
Handle<AllocationSite> top_site_;
bool activated_;
};
} // namespace internal
} // namespace v8
#endif // V8_OBJECTS_ALLOCATION_SITE_SCOPES_H_
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