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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 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 <list> | |
piman
2014/02/07 22:58:20
nit: you don't need this.
| |
10 #include <string.h> | 11 #include <string.h> |
11 #include <time.h> | 12 #include <time.h> |
12 | 13 |
14 #include "base/bind.h" | |
piman
2014/02/07 22:58:20
nit: or this
| |
13 #include "gpu/command_buffer/common/cmd_buffer_common.h" | 15 #include "gpu/command_buffer/common/cmd_buffer_common.h" |
14 #include "gpu/command_buffer/common/command_buffer.h" | 16 #include "gpu/command_buffer/common/command_buffer.h" |
15 #include "gpu/command_buffer/common/constants.h" | 17 #include "gpu/command_buffer/common/constants.h" |
16 #include "gpu/gpu_export.h" | 18 #include "gpu/gpu_export.h" |
17 | 19 |
18 namespace gpu { | 20 namespace gpu { |
19 | 21 |
20 // Command buffer helper class. This class simplifies ring buffer management: | 22 // Command buffer helper class. This class simplifies ring buffer management: |
21 // it will allocate the buffer, give it to the buffer interface, and let the | 23 // it will allocate the buffer, give it to the buffer interface, and let the |
22 // user add commands to it, while taking care of the synchronization (put and | 24 // user add commands to it, while taking care of the synchronization (put and |
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76 | 78 |
77 // Inserts a new token into the command buffer. This token either has a value | 79 // Inserts a new token into the command buffer. This token either has a value |
78 // different from previously inserted tokens, or ensures that previously | 80 // different from previously inserted tokens, or ensures that previously |
79 // inserted tokens with that value have already passed through the command | 81 // inserted tokens with that value have already passed through the command |
80 // stream. | 82 // stream. |
81 // Returns: | 83 // Returns: |
82 // the value of the new token or -1 if the command buffer reader has | 84 // the value of the new token or -1 if the command buffer reader has |
83 // shutdown. | 85 // shutdown. |
84 int32 InsertToken(); | 86 int32 InsertToken(); |
85 | 87 |
88 // Returns true if the token has passed. | |
89 // Parameters: | |
90 // the value of the token to check whether it has passed | |
91 bool HasTokenPassed(int32 token) const { | |
92 if (token > token_) | |
93 return true; // we wrapped | |
94 return last_token_read() >= token; | |
95 } | |
96 | |
86 // Waits until the token of a particular value has passed through the command | 97 // Waits until the token of a particular value has passed through the command |
87 // stream (i.e. commands inserted before that token have been executed). | 98 // stream (i.e. commands inserted before that token have been executed). |
88 // NOTE: This will call Flush if it needs to block. | 99 // NOTE: This will call Flush if it needs to block. |
89 // Parameters: | 100 // Parameters: |
90 // the value of the token to wait for. | 101 // the value of the token to wait for. |
91 void WaitForToken(int32 token); | 102 void WaitForToken(int32 token); |
92 | 103 |
93 // Called prior to each command being issued. Waits for a certain amount of | 104 // Called prior to each command being issued. Waits for a certain amount of |
94 // space to be available. Returns address of space. | 105 // space to be available. Returns address of space. |
95 CommandBufferEntry* GetSpace(uint32 entries); | 106 CommandBufferEntry* GetSpace(uint32 entries); |
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261 // Using C runtime instead of base because this file cannot depend on base. | 272 // Using C runtime instead of base because this file cannot depend on base. |
262 clock_t last_flush_time_; | 273 clock_t last_flush_time_; |
263 | 274 |
264 friend class CommandBufferHelperTest; | 275 friend class CommandBufferHelperTest; |
265 DISALLOW_COPY_AND_ASSIGN(CommandBufferHelper); | 276 DISALLOW_COPY_AND_ASSIGN(CommandBufferHelper); |
266 }; | 277 }; |
267 | 278 |
268 } // namespace gpu | 279 } // namespace gpu |
269 | 280 |
270 #endif // GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_ | 281 #endif // GPU_COMMAND_BUFFER_CLIENT_CMD_BUFFER_HELPER_H_ |
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