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Side by Side Diff: ppapi/shared_impl/var_tracker.h

Issue 7687005: Create ppapi_proxy.dll. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: '' Created 9 years, 3 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef PPAPI_SHARED_IMPL_VAR_TRACKER_H_ 5 #ifndef PPAPI_SHARED_IMPL_VAR_TRACKER_H_
6 #define PPAPI_SHARED_IMPL_VAR_TRACKER_H_ 6 #define PPAPI_SHARED_IMPL_VAR_TRACKER_H_
7 7
8 #include "base/basictypes.h" 8 #include "base/basictypes.h"
9 #include "base/hash_tables.h" 9 #include "base/hash_tables.h"
10 #include "base/memory/ref_counted.h" 10 #include "base/memory/ref_counted.h"
11 #include "ppapi/c/pp_var.h" 11 #include "ppapi/c/pp_var.h"
12 #include "ppapi/shared_impl/ppapi_shared_export.h"
12 13
13 namespace ppapi { 14 namespace ppapi {
14 15
15 class Var; 16 class Var;
16 17
17 // Tracks non-POD (refcounted) var objects held by a plugin. 18 // Tracks non-POD (refcounted) var objects held by a plugin.
18 // 19 //
19 // The tricky part is the concept of a "tracked object". These are only 20 // The tricky part is the concept of a "tracked object". These are only
20 // necessary in the plugin side of the proxy when running out of process. A 21 // necessary in the plugin side of the proxy when running out of process. A
21 // tracked object is one that the plugin is aware of, but doesn't hold a 22 // tracked object is one that the plugin is aware of, but doesn't hold a
22 // reference to. This will happen when the plugin is passed an object as an 23 // reference to. This will happen when the plugin is passed an object as an
23 // argument from the host (renderer) as an input argument to a sync function, 24 // argument from the host (renderer) as an input argument to a sync function,
24 // but where ownership is not passed. 25 // but where ownership is not passed.
25 // 26 //
26 // This class maintains the "track_with_no_reference_count" but doesn't do 27 // This class maintains the "track_with_no_reference_count" but doesn't do
27 // anything with it other than call virtual functions. The interesting parts 28 // anything with it other than call virtual functions. The interesting parts
28 // are added by the PluginObjectVar derived from this class. 29 // are added by the PluginObjectVar derived from this class.
29 class VarTracker { 30 class PPAPI_SHARED_EXPORT VarTracker {
30 public: 31 public:
31 VarTracker(); 32 VarTracker();
32 virtual ~VarTracker(); 33 virtual ~VarTracker();
33 34
34 // Called by the Var object to add a new var to the tracker. 35 // Called by the Var object to add a new var to the tracker.
35 int32 AddVar(Var* var); 36 int32 AddVar(Var* var);
36 37
37 // Looks up a given var and returns a reference to the Var if it exists. 38 // Looks up a given var and returns a reference to the Var if it exists.
38 // Returns NULL if the var type is not an object we track (POD) or is 39 // Returns NULL if the var type is not an object we track (POD) or is
39 // invalid. 40 // invalid.
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124 125
125 // Last assigned var ID. 126 // Last assigned var ID.
126 int32 last_var_id_; 127 int32 last_var_id_;
127 128
128 DISALLOW_COPY_AND_ASSIGN(VarTracker); 129 DISALLOW_COPY_AND_ASSIGN(VarTracker);
129 }; 130 };
130 131
131 } // namespace ppapi 132 } // namespace ppapi
132 133
133 #endif // PPAPI_SHARED_IMPL_VAR_TRACKER_H_ 134 #endif // PPAPI_SHARED_IMPL_VAR_TRACKER_H_
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