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Side by Side Diff: third_party/WebKit/Source/wtf/PartitionAllocator.h

Issue 1425533005: Rename DefaultAllocator to PartitionAllocator (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 5 years, 1 month ago
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1 /* 1 /*
2 * Copyright (C) 2013 Google Inc. All rights reserved. 2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 * 3 *
4 * Redistribution and use in source and binary forms, with or without 4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are 5 * modification, are permitted provided that the following conditions are
6 * met: 6 * met:
7 * 7 *
8 * * Redistributions of source code must retain the above copyright 8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer. 9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above 10 * * Redistributions in binary form must reproduce the above
(...skipping 10 matching lines...) Expand all
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 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. 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */ 29 */
30 30
31 #ifndef WTF_DefaultAllocator_h 31 #ifndef WTF_PartitionAllocator_h
32 #define WTF_DefaultAllocator_h 32 #define WTF_PartitionAllocator_h
33 33
34 // This is the allocator that is used for allocations that are not on the 34 // This is the allocator that is used for allocations that are not on the
35 // traced, garbage collected heap. It uses FastMalloc for collections, 35 // traced, garbage collected heap. It uses FastMalloc for collections,
36 // but uses the partition allocator for the backing store of the collections. 36 // but uses the partition allocator for the backing store of the collections.
37 37
38 #include "wtf/Allocator.h" 38 #include "wtf/Allocator.h"
39 #include "wtf/Assertions.h" 39 #include "wtf/Assertions.h"
40 #include "wtf/PartitionAlloc.h" 40 #include "wtf/PartitionAlloc.h"
41 #include "wtf/Partitions.h" 41 #include "wtf/Partitions.h"
42 42
43 #include <string.h> 43 #include <string.h>
44 44
45 namespace WTF { 45 namespace WTF {
46 46
47 class DefaultAllocatorDummyVisitor; 47 class PartitionAllocatorDummyVisitor;
48 48
49 class WTF_EXPORT DefaultAllocator { 49 class WTF_EXPORT PartitionAllocator {
50 public: 50 public:
51 typedef DefaultAllocatorDummyVisitor Visitor; 51 typedef PartitionAllocatorDummyVisitor Visitor;
52 static const bool isGarbageCollected = false; 52 static const bool isGarbageCollected = false;
53 53
54 template<typename T> 54 template<typename T>
55 static size_t quantizedSize(size_t count) 55 static size_t quantizedSize(size_t count)
56 { 56 {
57 RELEASE_ASSERT(count <= kGenericMaxDirectMapped / sizeof(T)); 57 RELEASE_ASSERT(count <= kGenericMaxDirectMapped / sizeof(T));
58 return partitionAllocActualSize(Partitions::bufferPartition(), count * s izeof(T)); 58 return partitionAllocActualSize(Partitions::bufferPartition(), count * s izeof(T));
59 } 59 }
60 template <typename T> 60 template <typename T>
61 static T* allocateVectorBacking(size_t size) 61 static T* allocateVectorBacking(size_t size)
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178 178
179 static void enterGCForbiddenScope() { } 179 static void enterGCForbiddenScope() { }
180 static void leaveGCForbiddenScope() { } 180 static void leaveGCForbiddenScope() { }
181 181
182 private: 182 private:
183 static void* allocateBacking(size_t); 183 static void* allocateBacking(size_t);
184 }; 184 };
185 185
186 // The Windows compiler seems to be very eager to instantiate things it won't 186 // The Windows compiler seems to be very eager to instantiate things it won't
187 // need, so unless we have this class we get compile errors. 187 // need, so unless we have this class we get compile errors.
188 class DefaultAllocatorDummyVisitor { 188 class PartitionAllocatorDummyVisitor {
189 public: 189 public:
190 template<typename T> inline bool isHeapObjectAlive(T obj) 190 template<typename T> inline bool isHeapObjectAlive(T obj)
191 { 191 {
192 ASSERT_NOT_REACHED(); 192 ASSERT_NOT_REACHED();
193 return false; 193 return false;
194 } 194 }
195 }; 195 };
196 196
197 } // namespace WTF 197 } // namespace WTF
198 198
199 #define WTF_USE_ALLOCATOR(ClassName, Allocator) \ 199 #define WTF_USE_ALLOCATOR(ClassName, Allocator) \
200 public: \ 200 public: \
201 void* operator new(size_t size) \ 201 void* operator new(size_t size) \
202 { \ 202 { \
203 return Allocator::template malloc<void*, ClassName>(size); \ 203 return Allocator::template malloc<void*, ClassName>(size); \
204 } \ 204 } \
205 void operator delete(void* p) { Allocator::free(p); } \ 205 void operator delete(void* p) { Allocator::free(p); } \
206 void* operator new[](size_t size) { return Allocator::template newArray<Clas sName>(size); } \ 206 void* operator new[](size_t size) { return Allocator::template newArray<Clas sName>(size); } \
207 void operator delete[](void* p) { Allocator::deleteArray(p); } \ 207 void operator delete[](void* p) { Allocator::deleteArray(p); } \
208 void* operator new(size_t, NotNullTag, void* location) \ 208 void* operator new(size_t, NotNullTag, void* location) \
209 { \ 209 { \
210 ASSERT(location); \ 210 ASSERT(location); \
211 return location; \ 211 return location; \
212 } \ 212 } \
213 private: \ 213 private: \
214 typedef int __thisIsHereToForceASemicolonAfterThisMacro 214 typedef int __thisIsHereToForceASemicolonAfterThisMacro
215 215
216 using WTF::DefaultAllocator; 216 using WTF::PartitionAllocator;
217 217
218 #endif // WTF_DefaultAllocator_h 218 #endif // WTF_PartitionAllocator_h
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