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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 #ifndef CC_SURFACES_SURFACE_ID_H_ | 5 #ifndef CC_SURFACES_SURFACE_ID_H_ |
6 #define CC_SURFACES_SURFACE_ID_H_ | 6 #define CC_SURFACES_SURFACE_ID_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
11 #include <functional> | 11 #include <functional> |
12 | 12 |
13 #include "base/containers/hash_tables.h" | |
14 | |
15 namespace cc { | 13 namespace cc { |
16 | 14 |
17 struct SurfaceId { | 15 struct SurfaceId { |
18 SurfaceId() : id(0) {} | 16 SurfaceId() : id(0) {} |
19 explicit SurfaceId(uint64_t id) : id(id) {} | 17 explicit SurfaceId(uint64_t id) : id(id) {} |
20 | 18 |
21 bool is_null() const { return id == 0; } | 19 bool is_null() const { return id == 0; } |
22 | 20 |
23 uint64_t id; | 21 uint64_t id; |
24 }; | 22 }; |
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37 | 35 |
38 struct SurfaceIdHash { | 36 struct SurfaceIdHash { |
39 size_t operator()(const SurfaceId& key) const { | 37 size_t operator()(const SurfaceId& key) const { |
40 return std::hash<uint64_t>()(key.id); | 38 return std::hash<uint64_t>()(key.id); |
41 } | 39 } |
42 }; | 40 }; |
43 | 41 |
44 } // namespace cc | 42 } // namespace cc |
45 | 43 |
46 #endif // CC_SURFACES_SURFACE_ID_H_ | 44 #endif // CC_SURFACES_SURFACE_ID_H_ |
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