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Side by Side Diff: gpu/command_buffer/client/cmd_buffer_helper.h

Issue 2509001: Refactor CommandBufferHelper to use Jump to loop... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: Created 10 years, 6 months ago
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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2009 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 command buffer helper class. 5 // This file contains the command buffer helper class.
6 6
7 #ifndef GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_ 7 #ifndef GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_
8 #define GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_ 8 #define GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_
9 9
10 #include <string.h> 10 #include <string.h>
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195 shared_memory_id, 195 shared_memory_id,
196 shared_memory_offset); 196 shared_memory_offset);
197 } 197 }
198 198
199 private: 199 private:
200 // Waits until get changes, updating the value of get_. 200 // Waits until get changes, updating the value of get_.
201 void WaitForGetChange(); 201 void WaitForGetChange();
202 202
203 // Returns the number of available entries (they may not be contiguous). 203 // Returns the number of available entries (they may not be contiguous).
204 int32 AvailableEntries() { 204 int32 AvailableEntries() {
205 return (get_ - put_ - 1 + entry_count_) % entry_count_; 205 return (get_ - put_ - 1 + usable_entry_count_) % usable_entry_count_;
206 } 206 }
207 207
208 // Synchronize with current service state. 208 // Synchronize with current service state.
209 void SynchronizeState(CommandBuffer::State state); 209 void SynchronizeState(CommandBuffer::State state);
210 210
211 CommandBuffer* command_buffer_; 211 CommandBuffer* command_buffer_;
212 Buffer ring_buffer_; 212 Buffer ring_buffer_;
213 CommandBufferEntry *entries_; 213 CommandBufferEntry *entries_;
214 int32 entry_count_; 214 int32 total_entry_count_; // the total number of entries
215 int32 usable_entry_count_; // the usable number (ie, minus space for jump)
215 int32 token_; 216 int32 token_;
216 int32 last_token_read_; 217 int32 last_token_read_;
217 int32 get_; 218 int32 get_;
218 int32 put_; 219 int32 put_;
219 220
220 friend class CommandBufferHelperTest; 221 friend class CommandBufferHelperTest;
221 DISALLOW_COPY_AND_ASSIGN(CommandBufferHelper); 222 DISALLOW_COPY_AND_ASSIGN(CommandBufferHelper);
222 }; 223 };
223 224
224 } // namespace gpu 225 } // namespace gpu
225 226
226 #endif // GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_ 227 #endif // GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_
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