1// Copyright (c) 2013 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include "net/spdy/spdy_read_queue.h" 6 7#include "base/logging.h" 8#include "base/stl_util.h" 9#include "net/spdy/spdy_buffer.h" 10 11namespace net { 12 13SpdyReadQueue::SpdyReadQueue() : total_size_(0) {} 14 15SpdyReadQueue::~SpdyReadQueue() { 16 Clear(); 17} 18 19bool SpdyReadQueue::IsEmpty() const { 20 DCHECK_EQ(queue_.empty(), total_size_ == 0); 21 return queue_.empty(); 22} 23 24size_t SpdyReadQueue::GetTotalSize() const { 25 return total_size_; 26} 27 28void SpdyReadQueue::Enqueue(scoped_ptr<SpdyBuffer> buffer) { 29 DCHECK_GT(buffer->GetRemainingSize(), 0u); 30 total_size_ += buffer->GetRemainingSize(); 31 queue_.push_back(buffer.release()); 32} 33 34size_t SpdyReadQueue::Dequeue(char* out, size_t len) { 35 DCHECK_GT(len, 0u); 36 size_t bytes_copied = 0; 37 while (!queue_.empty() && bytes_copied < len) { 38 SpdyBuffer* buffer = queue_.front(); 39 size_t bytes_to_copy = 40 std::min(len - bytes_copied, buffer->GetRemainingSize()); 41 memcpy(out + bytes_copied, buffer->GetRemainingData(), bytes_to_copy); 42 bytes_copied += bytes_to_copy; 43 if (bytes_to_copy == buffer->GetRemainingSize()) { 44 delete queue_.front(); 45 queue_.pop_front(); 46 } else { 47 buffer->Consume(bytes_to_copy); 48 } 49 } 50 total_size_ -= bytes_copied; 51 return bytes_copied; 52} 53 54void SpdyReadQueue::Clear() { 55 STLDeleteElements(&queue_); 56 queue_.clear(); 57} 58 59} // namespace 60