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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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