1 /*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #ifndef ART_RUNTIME_GC_ALLOCATOR_TYPE_H_
18 #define ART_RUNTIME_GC_ALLOCATOR_TYPE_H_
19
20 #include <iosfwd>
21
22 #include "base/macros.h"
23
24 namespace art HIDDEN {
25 namespace gc {
26
27 // Different types of allocators.
28 // Those marked with * have fast path entrypoints callable from generated code.
29 enum AllocatorType : char {
30 // BumpPointer spaces are currently only used for ZygoteSpace construction.
31 kAllocatorTypeBumpPointer, // Use global CAS-based BumpPointer allocator. (*)
32 kAllocatorTypeTLAB, // Use TLAB allocator within BumpPointer space. (*)
33 kAllocatorTypeRosAlloc, // Use RosAlloc (segregated size, free list) allocator. (*)
34 kAllocatorTypeDlMalloc, // Use dlmalloc (well-known C malloc) allocator. (*)
35 kAllocatorTypeNonMoving, // Special allocator for non moving objects.
36 kAllocatorTypeLOS, // Large object space.
37 // The following differ from the BumpPointer allocators primarily in that memory is
38 // allocated from multiple regions, instead of a single contiguous space.
39 kAllocatorTypeRegion, // Use CAS-based contiguous bump-pointer allocation within a region. (*)
40 kAllocatorTypeRegionTLAB, // Use region pieces as TLABs. Default for most small objects. (*)
41 };
42 std::ostream& operator<<(std::ostream& os, AllocatorType rhs);
43
IsTLABAllocator(AllocatorType allocator)44 inline constexpr bool IsTLABAllocator(AllocatorType allocator) {
45 return allocator == kAllocatorTypeTLAB || allocator == kAllocatorTypeRegionTLAB;
46 }
47
48 } // namespace gc
49 } // namespace art
50
51 #endif // ART_RUNTIME_GC_ALLOCATOR_TYPE_H_
52