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1 // Copyright (c) 2016 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // An arena that consists of a single inlined block of |ArenaSize|. Useful to | 5 // An arena that consists of a single inlined block of |ArenaSize|. Useful to |
6 // avoid repeated calls to malloc/new and to improve memory locality. DCHECK's | 6 // avoid repeated calls to malloc/new and to improve memory locality. DCHECK's |
7 // if an allocation out of the arena ever fails in debug builds; falls back to | 7 // if an allocation out of the arena ever fails in debug builds; falls back to |
8 // heap allocation in release builds. | 8 // heap allocation in release builds. |
9 | 9 |
10 #ifndef NET_QUIC_QUIC_ONE_BLOCK_ARENA_H_ | 10 #ifndef NET_QUIC_QUIC_ONE_BLOCK_ARENA_H_ |
11 #define NET_QUIC_QUIC_ONE_BLOCK_ARENA_H_ | 11 #define NET_QUIC_QUIC_ONE_BLOCK_ARENA_H_ |
12 | 12 |
13 #include "net/quic/quic_arena_scoped_ptr.h" | 13 #include "net/quic/core/quic_arena_scoped_ptr.h" |
14 #include "net/quic/quic_flags.h" | 14 #include "net/quic/core/quic_flags.h" |
15 #include "net/quic/quic_utils.h" | 15 #include "net/quic/core/quic_utils.h" |
16 | 16 |
17 #define PREDICT_FALSE(x) x | 17 #define PREDICT_FALSE(x) x |
18 | 18 |
19 namespace net { | 19 namespace net { |
20 | 20 |
21 template <uint32_t ArenaSize> | 21 template <uint32_t ArenaSize> |
22 class QuicOneBlockArena { | 22 class QuicOneBlockArena { |
23 static const uint32_t kMaxAlign = 8; | 23 static const uint32_t kMaxAlign = 8; |
24 | 24 |
25 public: | 25 public: |
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68 void* buf = &storage_[offset_]; | 68 void* buf = &storage_[offset_]; |
69 new (buf) T(std::forward<Args>(args)...); | 69 new (buf) T(std::forward<Args>(args)...); |
70 offset_ += AlignedSize<T>(); | 70 offset_ += AlignedSize<T>(); |
71 return QuicArenaScopedPtr<T>(buf, | 71 return QuicArenaScopedPtr<T>(buf, |
72 QuicArenaScopedPtr<T>::ConstructFrom::kArena); | 72 QuicArenaScopedPtr<T>::ConstructFrom::kArena); |
73 } | 73 } |
74 | 74 |
75 } // namespace net | 75 } // namespace net |
76 | 76 |
77 #endif // NET_QUIC_QUIC_ONE_BLOCK_ARENA_H_ | 77 #endif // NET_QUIC_QUIC_ONE_BLOCK_ARENA_H_ |
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