1/*
2 * Copyright (C) 2009 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef V8GCController_h
32#define V8GCController_h
33
34#include <v8.h>
35
36namespace WebCore {
37
38#ifndef NDEBUG
39
40#define GlobalHandleTypeList(V)   \
41    V(PROXY)                      \
42    V(NPOBJECT)                   \
43    V(SCHEDULED_ACTION)           \
44    V(EVENT_LISTENER)             \
45    V(NODE_FILTER)                \
46    V(SCRIPTINSTANCE)             \
47    V(SCRIPTVALUE)                \
48    V(DATASOURCE)
49
50
51    // Host information of persistent handles.
52    enum GlobalHandleType {
53#define ENUM(name) name,
54        GlobalHandleTypeList(ENUM)
55#undef ENUM
56    };
57
58    class GlobalHandleInfo {
59    public:
60        GlobalHandleInfo(void* host, GlobalHandleType type) : m_host(host), m_type(type) { }
61        void* m_host;
62        GlobalHandleType m_type;
63    };
64
65#endif // NDEBUG
66
67    class V8GCController {
68    public:
69#ifndef NDEBUG
70        // For debugging and leak detection purpose.
71        static void registerGlobalHandle(GlobalHandleType, void*, v8::Persistent<v8::Value>);
72        static void unregisterGlobalHandle(void*, v8::Persistent<v8::Value>);
73#endif
74
75        static void gcPrologue();
76        static void gcEpilogue();
77
78        static void checkMemoryUsage();
79
80    private:
81        // Estimate of current working set.
82        static int workingSetEstimateMB;
83    };
84
85}
86
87#endif // V8GCController_h
88