1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #ifndef V8_ALLOCATION_H_
29 #define V8_ALLOCATION_H_
36 // Called when allocation routines fail to allocate.
37 // This function should not return, but should terminate the current
39 void FatalProcessOutOfMemory(const char* message);
41 // Superclass for classes managed with new & delete.
44 void* operator new(size_t size) { return New(size); }
45 void operator delete(void* p) { Delete(p); }
47 static void FatalProcessOutOfMemory();
48 static void* New(size_t size);
49 static void Delete(void* p);
53 // A macro is used for defining the base class used for embedded instances.
54 // The reason is some compilers allocate a minimum of one word for the
55 // superclass. The macro prevents the use of new & delete in debug mode.
56 // In release mode we are not willing to pay this overhead.
59 // Superclass for classes with instances allocated inside stack
60 // activations or inside other objects.
63 void* operator new(size_t size);
64 void operator delete(void* p);
66 #define BASE_EMBEDDED : public Embedded
72 // Superclass for classes only using statics.
76 void* operator new(size_t size);
77 void operator delete(void* p);
83 T* NewArray(size_t size) {
84 T* result = new T[size];
85 if (result == NULL) Malloced::FatalProcessOutOfMemory();
91 void DeleteArray(T* array) {
96 // The normal strdup functions use malloc. These versions of StrDup
97 // and StrNDup uses new and calls the FatalProcessOutOfMemory handler
98 // if allocation fails.
99 char* StrDup(const char* str);
100 char* StrNDup(const char* str, int n);
103 // Allocation policy for allocating in the C free store using malloc
104 // and free. Used as the default policy for lists.
105 class FreeStoreAllocationPolicy {
107 INLINE(static void* New(size_t size)) { return Malloced::New(size); }
108 INLINE(static void Delete(void* p)) { Malloced::Delete(p); }
112 // Allocation policy for allocating in preallocated space.
113 // Used as an allocation policy for ScopeInfo when generating
115 class PreallocatedStorage {
117 explicit PreallocatedStorage(size_t size);
118 size_t size() { return size_; }
120 // TODO(isolates): Get rid of these-- we'll have to change the allocator
121 // interface to include a pointer to an isolate to do this
123 static inline void* New(size_t size);
124 static inline void Delete(void* p);
128 PreallocatedStorage* previous_;
129 PreallocatedStorage* next_;
131 void LinkTo(PreallocatedStorage* other);
134 friend class Isolate;
136 DISALLOW_IMPLICIT_CONSTRUCTORS(PreallocatedStorage);
140 } } // namespace v8::internal
142 #endif // V8_ALLOCATION_H_