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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 // This file contains the implementation of IdAllocator. | 5 // This file contains the implementation of IdAllocator. |
6 | 6 |
7 #include "gpu/command_buffer/common/id_allocator.h" | 7 #include "gpu/command_buffer/common/id_allocator.h" |
8 | 8 |
| 9 #include <stdint.h> |
| 10 |
9 #include <limits> | 11 #include <limits> |
10 #include "base/logging.h" | 12 #include "base/logging.h" |
11 | 13 |
12 namespace gpu { | 14 namespace gpu { |
13 | 15 |
14 IdAllocator::IdAllocator() { | 16 IdAllocator::IdAllocator() { |
15 static_assert(kInvalidResource == 0u, "kInvalidResource must be 0"); | 17 static_assert(kInvalidResource == 0u, "kInvalidResource must be 0"); |
16 // Simplify the code by making sure that lower_bound(id) never | 18 // Simplify the code by making sure that lower_bound(id) never |
17 // returns the beginning of the map, if id is valid (eg != | 19 // returns the beginning of the map, if id is valid (eg != |
18 // kInvalidResource). | 20 // kInvalidResource). |
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135 } | 137 } |
136 | 138 |
137 used_ids_.insert(std::make_pair(id, id)); | 139 used_ids_.insert(std::make_pair(id, id)); |
138 return true; | 140 return true; |
139 } | 141 } |
140 | 142 |
141 void IdAllocator::FreeID(ResourceId id) { | 143 void IdAllocator::FreeID(ResourceId id) { |
142 FreeIDRange(id, 1u); | 144 FreeIDRange(id, 1u); |
143 } | 145 } |
144 | 146 |
145 void IdAllocator::FreeIDRange(ResourceId first_id, uint32 range) { | 147 void IdAllocator::FreeIDRange(ResourceId first_id, uint32_t range) { |
146 static_assert(kInvalidResource == 0u, "kInvalidResource must be 0"); | 148 static_assert(kInvalidResource == 0u, "kInvalidResource must be 0"); |
147 | 149 |
148 if (range == 0u || (first_id == 0u && range == 1u)) { | 150 if (range == 0u || (first_id == 0u && range == 1u)) { |
149 return; | 151 return; |
150 } | 152 } |
151 | 153 |
152 if (first_id == 0u) { | 154 if (first_id == 0u) { |
153 first_id++; | 155 first_id++; |
154 range--; | 156 range--; |
155 } | 157 } |
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196 if (current->first == id) { | 198 if (current->first == id) { |
197 return true; | 199 return true; |
198 } | 200 } |
199 } | 201 } |
200 | 202 |
201 --current; | 203 --current; |
202 return current->second >= id; | 204 return current->second >= id; |
203 } | 205 } |
204 | 206 |
205 } // namespace gpu | 207 } // namespace gpu |
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