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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 the command buffer helper class. | 5 // This file contains the implementation of the command buffer helper class. |
6 | 6 |
7 #include "gpu/command_buffer/client/cmd_buffer_helper.h" | 7 #include "gpu/command_buffer/client/cmd_buffer_helper.h" |
8 | 8 |
9 #include "base/logging.h" | 9 #include "base/logging.h" |
10 #include "gpu/command_buffer/common/command_buffer.h" | 10 #include "gpu/command_buffer/common/command_buffer.h" |
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162 if (token_ == 0) { | 162 if (token_ == 0) { |
163 TRACE_EVENT0("gpu", "CommandBufferHelper::InsertToken(wrapped)"); | 163 TRACE_EVENT0("gpu", "CommandBufferHelper::InsertToken(wrapped)"); |
164 // we wrapped | 164 // we wrapped |
165 Finish(); | 165 Finish(); |
166 DCHECK_EQ(token_, last_token_read()); | 166 DCHECK_EQ(token_, last_token_read()); |
167 } | 167 } |
168 } | 168 } |
169 return token_; | 169 return token_; |
170 } | 170 } |
171 | 171 |
| 172 bool CommandBufferHelper::HasTokenPassed(int32 token) { |
| 173 if (token > token_) |
| 174 return true; // we wrapped |
| 175 return last_token_read() >= token; |
| 176 } |
| 177 |
172 // Waits until the current token value is greater or equal to the value passed | 178 // Waits until the current token value is greater or equal to the value passed |
173 // in argument. | 179 // in argument. |
174 void CommandBufferHelper::WaitForToken(int32 token) { | 180 void CommandBufferHelper::WaitForToken(int32 token) { |
175 if (!usable() || !HaveRingBuffer()) { | 181 if (!usable() || !HaveRingBuffer()) { |
176 return; | 182 return; |
177 } | 183 } |
178 // Return immediately if corresponding InsertToken failed. | 184 // Return immediately if corresponding InsertToken failed. |
179 if (token < 0) | 185 if (token < 0) |
180 return; | 186 return; |
181 if (token > token_) return; // we wrapped | 187 if (token > token_) return; // we wrapped |
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270 CommandBufferEntry* space = &entries_[put_]; | 276 CommandBufferEntry* space = &entries_[put_]; |
271 put_ += entries; | 277 put_ += entries; |
272 DCHECK_LE(put_, total_entry_count_); | 278 DCHECK_LE(put_, total_entry_count_); |
273 if (put_ == total_entry_count_) { | 279 if (put_ == total_entry_count_) { |
274 put_ = 0; | 280 put_ = 0; |
275 } | 281 } |
276 return space; | 282 return space; |
277 } | 283 } |
278 | 284 |
279 } // namespace gpu | 285 } // namespace gpu |
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