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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 "gpu/command_buffer/common/logging.h" | 10 #include "gpu/command_buffer/common/logging.h" |
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24 // helper.AddCommand(...); | 24 // helper.AddCommand(...); |
25 // int32 token = helper.InsertToken(); | 25 // int32 token = helper.InsertToken(); |
26 // helper.AddCommand(...); | 26 // helper.AddCommand(...); |
27 // helper.AddCommand(...); | 27 // helper.AddCommand(...); |
28 // [...] | 28 // [...] |
29 // | 29 // |
30 // helper.WaitForToken(token); // this doesn't return until the first two | 30 // helper.WaitForToken(token); // this doesn't return until the first two |
31 // // commands have been executed. | 31 // // commands have been executed. |
32 class CommandBufferHelper { | 32 class CommandBufferHelper { |
33 public: | 33 public: |
34 explicit CommandBufferHelper(gpu::CommandBuffer* command_buffer); | 34 explicit CommandBufferHelper(CommandBuffer* command_buffer); |
35 virtual ~CommandBufferHelper(); | 35 virtual ~CommandBufferHelper(); |
36 | 36 |
37 bool Initialize(); | 37 bool Initialize(); |
38 | 38 |
39 // Flushes the commands, setting the put pointer to let the buffer interface | 39 // Flushes the commands, setting the put pointer to let the buffer interface |
40 // know that new commands have been added. After a flush returns, the command | 40 // know that new commands have been added. After a flush returns, the command |
41 // buffer service is aware of all pending commands and it is guaranteed to | 41 // buffer service is aware of all pending commands and it is guaranteed to |
42 // have made some progress in processing them. Returns whether the flush was | 42 // have made some progress in processing them. Returns whether the flush was |
43 // successful. The flush will fail if the command buffer service has | 43 // successful. The flush will fail if the command buffer service has |
44 // disconnected. | 44 // disconnected. |
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163 | 163 |
164 private: | 164 private: |
165 // Waits until get changes, updating the value of get_. | 165 // Waits until get changes, updating the value of get_. |
166 void WaitForGetChange(); | 166 void WaitForGetChange(); |
167 | 167 |
168 // Returns the number of available entries (they may not be contiguous). | 168 // Returns the number of available entries (they may not be contiguous). |
169 int32 AvailableEntries() { | 169 int32 AvailableEntries() { |
170 return (get_ - put_ - 1 + entry_count_) % entry_count_; | 170 return (get_ - put_ - 1 + entry_count_) % entry_count_; |
171 } | 171 } |
172 | 172 |
173 gpu::CommandBuffer* command_buffer_; | 173 CommandBuffer* command_buffer_; |
174 ::base::SharedMemory* ring_buffer_; | 174 Buffer ring_buffer_; |
175 CommandBufferEntry *entries_; | 175 CommandBufferEntry *entries_; |
176 int32 entry_count_; | 176 int32 entry_count_; |
177 int32 token_; | 177 int32 token_; |
178 int32 last_token_read_; | 178 int32 last_token_read_; |
179 int32 get_; | 179 int32 get_; |
180 int32 put_; | 180 int32 put_; |
181 | 181 |
182 friend class CommandBufferHelperTest; | 182 friend class CommandBufferHelperTest; |
183 DISALLOW_COPY_AND_ASSIGN(CommandBufferHelper); | 183 DISALLOW_COPY_AND_ASSIGN(CommandBufferHelper); |
184 }; | 184 }; |
185 | 185 |
186 } // namespace gpu | 186 } // namespace gpu |
187 | 187 |
188 #endif // GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_ | 188 #endif // GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_ |
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