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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 #include "net/tools/flip_server/ring_buffer.h" | 5 #include "net/tools/flip_server/ring_buffer.h" |
| 6 #include "base/logging.h" | 6 #include "base/logging.h" |
| 7 | 7 |
| 8 namespace net { | 8 namespace net { |
| 9 | 9 |
| 10 RingBuffer::RingBuffer(int buffer_size) | 10 RingBuffer::RingBuffer(int buffer_size) |
| 11 : buffer_(new char[buffer_size]), | 11 : buffer_(new char[buffer_size]), |
| 12 buffer_size_(buffer_size), | 12 buffer_size_(buffer_size), |
| 13 bytes_used_(0), | 13 bytes_used_(0), |
| 14 read_idx_(0), | 14 read_idx_(0), |
| 15 write_idx_(0) {} | 15 write_idx_(0) { |
| 16 } |
| 16 | 17 |
| 17 RingBuffer::~RingBuffer() {} | 18 RingBuffer::~RingBuffer() { |
| 19 } |
| 18 | 20 |
| 19 int RingBuffer::ReadableBytes() const { return bytes_used_; } | 21 int RingBuffer::ReadableBytes() const { |
| 22 return bytes_used_; |
| 23 } |
| 20 | 24 |
| 21 int RingBuffer::BufferSize() const { return buffer_size_; } | 25 int RingBuffer::BufferSize() const { |
| 26 return buffer_size_; |
| 27 } |
| 22 | 28 |
| 23 int RingBuffer::BytesFree() const { return BufferSize() - ReadableBytes(); } | 29 int RingBuffer::BytesFree() const { |
| 30 return BufferSize() - ReadableBytes(); |
| 31 } |
| 24 | 32 |
| 25 bool RingBuffer::Empty() const { return ReadableBytes() == 0; } | 33 bool RingBuffer::Empty() const { |
| 34 return ReadableBytes() == 0; |
| 35 } |
| 26 | 36 |
| 27 bool RingBuffer::Full() const { return ReadableBytes() == BufferSize(); } | 37 bool RingBuffer::Full() const { |
| 38 return ReadableBytes() == BufferSize(); |
| 39 } |
| 28 | 40 |
| 29 // Returns the number of characters written. | 41 // Returns the number of characters written. |
| 30 // Appends up-to-'size' bytes to the ringbuffer. | 42 // Appends up-to-'size' bytes to the ringbuffer. |
| 31 int RingBuffer::Write(const char* bytes, int size) { | 43 int RingBuffer::Write(const char* bytes, int size) { |
| 32 CHECK_GE(size, 0); | 44 CHECK_GE(size, 0); |
| 33 #if 1 | 45 #if 1 |
| 34 char* wptr; | 46 char* wptr; |
| 35 int wsize; | 47 int wsize; |
| 36 GetWritablePtr(&wptr, &wsize); | 48 GetWritablePtr(&wptr, &wsize); |
| 37 int bytes_remaining = size; | 49 int bytes_remaining = size; |
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| 232 } | 244 } |
| 233 buffer_.reset(new_buffer); | 245 buffer_.reset(new_buffer); |
| 234 | 246 |
| 235 buffer_size_ = buffer_size; | 247 buffer_size_ = buffer_size; |
| 236 bytes_used_ = bytes_used; | 248 bytes_used_ = bytes_used; |
| 237 read_idx_ = 0; | 249 read_idx_ = 0; |
| 238 write_idx_ = bytes_used_ % buffer_size_; | 250 write_idx_ = bytes_used_ % buffer_size_; |
| 239 } | 251 } |
| 240 | 252 |
| 241 } // namespace net | 253 } // namespace net |
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