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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 // A class to Manage a growing transfer buffer. | 5 // A class to Manage a growing transfer buffer. |
6 | 6 |
7 #include "gpu/command_buffer/client/transfer_buffer.h" | 7 #include "gpu/command_buffer/client/transfer_buffer.h" |
8 | 8 |
| 9 #include <stddef.h> |
| 10 #include <stdint.h> |
| 11 |
9 #include "base/bits.h" | 12 #include "base/bits.h" |
10 #include "base/logging.h" | 13 #include "base/logging.h" |
11 #include "base/trace_event/trace_event.h" | 14 #include "base/trace_event/trace_event.h" |
12 #include "gpu/command_buffer/client/cmd_buffer_helper.h" | 15 #include "gpu/command_buffer/client/cmd_buffer_helper.h" |
13 | 16 |
14 namespace gpu { | 17 namespace gpu { |
15 | 18 |
16 TransferBuffer::TransferBuffer( | 19 TransferBuffer::TransferBuffer( |
17 CommandBufferHelper* helper) | 20 CommandBufferHelper* helper) |
18 : helper_(helper), | 21 : helper_(helper), |
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88 unsigned int TransferBuffer::GetSize() const { | 91 unsigned int TransferBuffer::GetSize() const { |
89 return HaveBuffer() ? ring_buffer_->GetLargestFreeOrPendingSize() : 0; | 92 return HaveBuffer() ? ring_buffer_->GetLargestFreeOrPendingSize() : 0; |
90 } | 93 } |
91 | 94 |
92 unsigned int TransferBuffer::GetFreeSize() const { | 95 unsigned int TransferBuffer::GetFreeSize() const { |
93 return HaveBuffer() ? ring_buffer_->GetTotalFreeSizeNoWaiting() : 0; | 96 return HaveBuffer() ? ring_buffer_->GetTotalFreeSizeNoWaiting() : 0; |
94 } | 97 } |
95 | 98 |
96 void TransferBuffer::AllocateRingBuffer(unsigned int size) { | 99 void TransferBuffer::AllocateRingBuffer(unsigned int size) { |
97 for (;size >= min_buffer_size_; size /= 2) { | 100 for (;size >= min_buffer_size_; size /= 2) { |
98 int32 id = -1; | 101 int32_t id = -1; |
99 scoped_refptr<gpu::Buffer> buffer = | 102 scoped_refptr<gpu::Buffer> buffer = |
100 helper_->command_buffer()->CreateTransferBuffer(size, &id); | 103 helper_->command_buffer()->CreateTransferBuffer(size, &id); |
101 if (id != -1) { | 104 if (id != -1) { |
102 DCHECK(buffer.get()); | 105 DCHECK(buffer.get()); |
103 buffer_ = buffer; | 106 buffer_ = buffer; |
104 ring_buffer_.reset(new RingBuffer( | 107 ring_buffer_.reset(new RingBuffer( |
105 alignment_, | 108 alignment_, |
106 result_size_, | 109 result_size_, |
107 buffer_->size() - result_size_, | 110 buffer_->size() - result_size_, |
108 helper_, | 111 helper_, |
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212 Release(); | 215 Release(); |
213 // NOTE: we allocate buffers of size 0 so that HaveBuffer will be true, so | 216 // NOTE: we allocate buffers of size 0 so that HaveBuffer will be true, so |
214 // that address will return a pointer just like malloc, and so that GetShmId | 217 // that address will return a pointer just like malloc, and so that GetShmId |
215 // will be valid. That has the side effect that we'll insert a token on free. | 218 // will be valid. That has the side effect that we'll insert a token on free. |
216 // We could add code skip the token for a zero size buffer but it doesn't seem | 219 // We could add code skip the token for a zero size buffer but it doesn't seem |
217 // worth the complication. | 220 // worth the complication. |
218 buffer_ = transfer_buffer_->AllocUpTo(new_size, &size_); | 221 buffer_ = transfer_buffer_->AllocUpTo(new_size, &size_); |
219 } | 222 } |
220 | 223 |
221 } // namespace gpu | 224 } // namespace gpu |
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