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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 the RingBuffer class. | 5 // This file contains the implementation of the RingBuffer class. |
6 | 6 |
7 #include "gpu/command_buffer/client/ring_buffer.h" | 7 #include "gpu/command_buffer/client/ring_buffer.h" |
8 | 8 |
| 9 #include <stdint.h> |
| 10 |
9 #include <algorithm> | 11 #include <algorithm> |
10 | 12 |
11 #include "base/logging.h" | 13 #include "base/logging.h" |
12 #include "gpu/command_buffer/client/cmd_buffer_helper.h" | 14 #include "gpu/command_buffer/client/cmd_buffer_helper.h" |
13 | 15 |
14 namespace gpu { | 16 namespace gpu { |
15 | 17 |
16 RingBuffer::RingBuffer(unsigned int alignment, Offset base_offset, | 18 RingBuffer::RingBuffer(unsigned int alignment, |
17 unsigned int size, CommandBufferHelper* helper, | 19 Offset base_offset, |
| 20 unsigned int size, |
| 21 CommandBufferHelper* helper, |
18 void* base) | 22 void* base) |
19 : helper_(helper), | 23 : helper_(helper), |
20 base_offset_(base_offset), | 24 base_offset_(base_offset), |
21 size_(size), | 25 size_(size), |
22 free_offset_(0), | 26 free_offset_(0), |
23 in_use_offset_(0), | 27 in_use_offset_(0), |
24 alignment_(alignment), | 28 alignment_(alignment), |
25 base_(static_cast<int8*>(base) - base_offset) { | 29 base_(static_cast<int8_t*>(base) - base_offset) {} |
26 } | |
27 | 30 |
28 RingBuffer::~RingBuffer() { | 31 RingBuffer::~RingBuffer() { |
29 // Free blocks pending tokens. | 32 // Free blocks pending tokens. |
30 while (!blocks_.empty()) { | 33 while (!blocks_.empty()) { |
31 FreeOldestBlock(); | 34 FreeOldestBlock(); |
32 } | 35 } |
33 } | 36 } |
34 | 37 |
35 void RingBuffer::FreeOldestBlock() { | 38 void RingBuffer::FreeOldestBlock() { |
36 DCHECK(!blocks_.empty()) << "no free blocks"; | 39 DCHECK(!blocks_.empty()) << "no free blocks"; |
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171 unsigned int largest_free_size = GetLargestFreeSizeNoWaiting(); | 174 unsigned int largest_free_size = GetLargestFreeSizeNoWaiting(); |
172 if (free_offset_ > in_use_offset_) { | 175 if (free_offset_ > in_use_offset_) { |
173 // It's free from free_offset_ to size_ and from 0 to in_use_offset_. | 176 // It's free from free_offset_ to size_ and from 0 to in_use_offset_. |
174 return size_ - free_offset_ + in_use_offset_; | 177 return size_ - free_offset_ + in_use_offset_; |
175 } else { | 178 } else { |
176 return largest_free_size; | 179 return largest_free_size; |
177 } | 180 } |
178 } | 181 } |
179 | 182 |
180 } // namespace gpu | 183 } // namespace gpu |
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