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Issue 6685088: Merge isolates to bleeding_edge. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 9 years, 9 months ago
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1 // Copyright 2008 the V8 project authors. All rights reserved. 1 // Copyright 2008 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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36 36
37 // Called when allocation routines fail to allocate. 37 // Called when allocation routines fail to allocate.
38 // This function should not return, but should terminate the current 38 // This function should not return, but should terminate the current
39 // processing. 39 // processing.
40 void FatalProcessOutOfMemory(const char* message); 40 void FatalProcessOutOfMemory(const char* message);
41 41
42 // A class that controls whether allocation is allowed. This is for 42 // A class that controls whether allocation is allowed. This is for
43 // the C++ heap only! 43 // the C++ heap only!
44 class NativeAllocationChecker { 44 class NativeAllocationChecker {
45 public: 45 public:
46 typedef enum { ALLOW, DISALLOW } NativeAllocationAllowed; 46 enum NativeAllocationAllowed { ALLOW, DISALLOW };
47 explicit inline NativeAllocationChecker(NativeAllocationAllowed allowed)
48 : allowed_(allowed) {
49 #ifdef DEBUG 47 #ifdef DEBUG
50 if (allowed == DISALLOW) { 48 explicit NativeAllocationChecker(NativeAllocationAllowed allowed);
51 allocation_disallowed_++; 49 ~NativeAllocationChecker();
52 } 50 static bool allocation_allowed();
53 #endif
54 }
55 ~NativeAllocationChecker() {
56 #ifdef DEBUG
57 if (allowed_ == DISALLOW) {
58 allocation_disallowed_--;
59 }
60 #endif
61 ASSERT(allocation_disallowed_ >= 0);
62 }
63 static inline bool allocation_allowed() {
64 return allocation_disallowed_ == 0;
65 }
66 private: 51 private:
67 // This static counter ensures that NativeAllocationCheckers can be nested.
68 static int allocation_disallowed_;
69 // This flag applies to this particular instance. 52 // This flag applies to this particular instance.
70 NativeAllocationAllowed allowed_; 53 NativeAllocationAllowed allowed_;
54 #else
55 explicit inline NativeAllocationChecker(NativeAllocationAllowed allowed) {}
56 static inline bool allocation_allowed() { return true; }
57 #endif
71 }; 58 };
72 59
73 60
74 // Superclass for classes managed with new & delete. 61 // Superclass for classes managed with new & delete.
75 class Malloced { 62 class Malloced {
76 public: 63 public:
77 void* operator new(size_t size) { return New(size); } 64 void* operator new(size_t size) { return New(size); }
78 void operator delete(void* p) { Delete(p); } 65 void operator delete(void* p) { Delete(p); }
79 66
80 static void FatalProcessOutOfMemory(); 67 static void FatalProcessOutOfMemory();
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139 class FreeStoreAllocationPolicy { 126 class FreeStoreAllocationPolicy {
140 public: 127 public:
141 INLINE(static void* New(size_t size)) { return Malloced::New(size); } 128 INLINE(static void* New(size_t size)) { return Malloced::New(size); }
142 INLINE(static void Delete(void* p)) { Malloced::Delete(p); } 129 INLINE(static void Delete(void* p)) { Malloced::Delete(p); }
143 }; 130 };
144 131
145 132
146 // Allocation policy for allocating in preallocated space. 133 // Allocation policy for allocating in preallocated space.
147 // Used as an allocation policy for ScopeInfo when generating 134 // Used as an allocation policy for ScopeInfo when generating
148 // stack traces. 135 // stack traces.
149 class PreallocatedStorage : public AllStatic { 136 class PreallocatedStorage {
150 public: 137 public:
151 explicit PreallocatedStorage(size_t size); 138 explicit PreallocatedStorage(size_t size);
152 size_t size() { return size_; } 139 size_t size() { return size_; }
153 static void* New(size_t size);
154 static void Delete(void* p);
155 140
156 // Preallocate a set number of bytes. 141 // TODO(isolates): Get rid of these-- we'll have to change the allocator
157 static void Init(size_t size); 142 // interface to include a pointer to an isolate to do this
143 // efficiently.
144 static inline void* New(size_t size);
145 static inline void Delete(void* p);
158 146
159 private: 147 private:
160 size_t size_; 148 size_t size_;
161 PreallocatedStorage* previous_; 149 PreallocatedStorage* previous_;
162 PreallocatedStorage* next_; 150 PreallocatedStorage* next_;
163 static bool preallocated_;
164
165 static PreallocatedStorage in_use_list_;
166 static PreallocatedStorage free_list_;
167 151
168 void LinkTo(PreallocatedStorage* other); 152 void LinkTo(PreallocatedStorage* other);
169 void Unlink(); 153 void Unlink();
154
155 friend class Isolate;
156
170 DISALLOW_IMPLICIT_CONSTRUCTORS(PreallocatedStorage); 157 DISALLOW_IMPLICIT_CONSTRUCTORS(PreallocatedStorage);
171 }; 158 };
172 159
173 160
174 } } // namespace v8::internal 161 } } // namespace v8::internal
175 162
176 #endif // V8_ALLOCATION_H_ 163 #endif // V8_ALLOCATION_H_
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