1// Copyright 2006-2008 the V8 project authors. All rights reserved.
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3// modification, are permitted provided that the following conditions are
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27
28#include "isolate.h"
29
30#ifndef V8_SNAPSHOT_H_
31#define V8_SNAPSHOT_H_
32
33namespace v8 {
34namespace internal {
35
36STATIC_CLASS Snapshot {
37 public:
38  // Initialize the VM from the given snapshot file. If snapshot_file is
39  // NULL, use the internal snapshot instead. Returns false if no snapshot
40  // could be found.
41  static bool Initialize(const char* snapshot_file = NULL);
42
43  // Create a new context using the internal partial snapshot.
44  static Handle<Context> NewContextFromSnapshot();
45
46  // Returns whether or not the snapshot is enabled.
47  static bool IsEnabled() { return size_ != 0; }
48
49  // Write snapshot to the given file. Returns true if snapshot was written
50  // successfully.
51  static bool WriteToFile(const char* snapshot_file);
52
53 private:
54  static const byte data_[];
55  static const byte context_data_[];
56  static const int new_space_used_;
57  static const int pointer_space_used_;
58  static const int data_space_used_;
59  static const int code_space_used_;
60  static const int map_space_used_;
61  static const int cell_space_used_;
62  static const int large_space_used_;
63  static const int size_;
64  static const int context_size_;
65
66  static bool Deserialize(const byte* content, int len);
67
68  DISALLOW_IMPLICIT_CONSTRUCTORS(Snapshot);
69};
70
71} }  // namespace v8::internal
72
73#endif  // V8_SNAPSHOT_H_
74