1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef GIN_PER_CONTEXT_DATA_H_
6#define GIN_PER_CONTEXT_DATA_H_
7
8#include "base/basictypes.h"
9#include "base/supports_user_data.h"
10#include "gin/gin_export.h"
11#include "v8/include/v8.h"
12
13namespace gin {
14
15class ContextHolder;
16class Runner;
17
18// There is one instance of PerContextData per v8::Context managed by Gin. This
19// class stores all the Gin-related data that varies per context. Arbitrary data
20// can be associated with this class by way of the SupportsUserData methods.
21// Instances of this class (and any associated user data) are destroyed before
22// the associated v8::Context.
23class GIN_EXPORT PerContextData : public base::SupportsUserData {
24 public:
25  PerContextData(ContextHolder* context_holder,
26                 v8::Handle<v8::Context> context);
27  virtual ~PerContextData();
28
29  // Can return NULL after the ContextHolder has detached from context.
30  static PerContextData* From(v8::Handle<v8::Context> context);
31
32  // The Runner associated with this context. To execute script in this context,
33  // please use the appropriate API on Runner.
34  Runner* runner() const { return runner_; }
35  void set_runner(Runner* runner) { runner_ = runner; }
36
37  ContextHolder* context_holder() { return context_holder_; }
38
39 private:
40  ContextHolder* context_holder_;
41  Runner* runner_;
42
43  DISALLOW_COPY_AND_ASSIGN(PerContextData);
44};
45
46}  // namespace gin
47
48#endif  // GIN_PER_CONTEXT_DATA_H_
49