gin/per_context_data.h

   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
  13 namespace gin {
  14
  15 class ContextHolder;
  16 class 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.
  23 class 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_