| OLD | NEW |
| (Empty) |
| 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_write_queue.h" | |
| 6 | |
| 7 #include <cstddef> | |
| 8 #include <vector> | |
| 9 | |
| 10 #include "base/logging.h" | |
| 11 #include "base/stl_util.h" | |
| 12 #include "net/spdy/spdy_buffer.h" | |
| 13 #include "net/spdy/spdy_buffer_producer.h" | |
| 14 #include "net/spdy/spdy_stream.h" | |
| 15 | |
| 16 namespace net { | |
| 17 | |
| 18 SpdyWriteQueue::PendingWrite::PendingWrite() : frame_producer(NULL) {} | |
| 19 | |
| 20 SpdyWriteQueue::PendingWrite::PendingWrite( | |
| 21 SpdyFrameType frame_type, | |
| 22 SpdyBufferProducer* frame_producer, | |
| 23 const base::WeakPtr<SpdyStream>& stream) | |
| 24 : frame_type(frame_type), | |
| 25 frame_producer(frame_producer), | |
| 26 stream(stream), | |
| 27 has_stream(stream.get() != NULL) {} | |
| 28 | |
| 29 SpdyWriteQueue::PendingWrite::~PendingWrite() {} | |
| 30 | |
| 31 SpdyWriteQueue::SpdyWriteQueue() : removing_writes_(false) {} | |
| 32 | |
| 33 SpdyWriteQueue::~SpdyWriteQueue() { | |
| 34 Clear(); | |
| 35 } | |
| 36 | |
| 37 bool SpdyWriteQueue::IsEmpty() const { | |
| 38 for (int i = MINIMUM_PRIORITY; i <= MAXIMUM_PRIORITY; i++) { | |
| 39 if (!queue_[i].empty()) | |
| 40 return false; | |
| 41 } | |
| 42 return true; | |
| 43 } | |
| 44 | |
| 45 void SpdyWriteQueue::Enqueue(RequestPriority priority, | |
| 46 SpdyFrameType frame_type, | |
| 47 scoped_ptr<SpdyBufferProducer> frame_producer, | |
| 48 const base::WeakPtr<SpdyStream>& stream) { | |
| 49 CHECK(!removing_writes_); | |
| 50 CHECK_GE(priority, MINIMUM_PRIORITY); | |
| 51 CHECK_LE(priority, MAXIMUM_PRIORITY); | |
| 52 if (stream.get()) | |
| 53 DCHECK_EQ(stream->priority(), priority); | |
| 54 queue_[priority].push_back( | |
| 55 PendingWrite(frame_type, frame_producer.release(), stream)); | |
| 56 } | |
| 57 | |
| 58 bool SpdyWriteQueue::Dequeue(SpdyFrameType* frame_type, | |
| 59 scoped_ptr<SpdyBufferProducer>* frame_producer, | |
| 60 base::WeakPtr<SpdyStream>* stream) { | |
| 61 CHECK(!removing_writes_); | |
| 62 for (int i = MAXIMUM_PRIORITY; i >= MINIMUM_PRIORITY; --i) { | |
| 63 if (!queue_[i].empty()) { | |
| 64 PendingWrite pending_write = queue_[i].front(); | |
| 65 queue_[i].pop_front(); | |
| 66 *frame_type = pending_write.frame_type; | |
| 67 frame_producer->reset(pending_write.frame_producer); | |
| 68 *stream = pending_write.stream; | |
| 69 if (pending_write.has_stream) | |
| 70 DCHECK(stream->get()); | |
| 71 return true; | |
| 72 } | |
| 73 } | |
| 74 return false; | |
| 75 } | |
| 76 | |
| 77 void SpdyWriteQueue::RemovePendingWritesForStream( | |
| 78 const base::WeakPtr<SpdyStream>& stream) { | |
| 79 CHECK(!removing_writes_); | |
| 80 removing_writes_ = true; | |
| 81 RequestPriority priority = stream->priority(); | |
| 82 CHECK_GE(priority, MINIMUM_PRIORITY); | |
| 83 CHECK_LE(priority, MAXIMUM_PRIORITY); | |
| 84 | |
| 85 DCHECK(stream.get()); | |
| 86 #if DCHECK_IS_ON() | |
| 87 // |stream| should not have pending writes in a queue not matching | |
| 88 // its priority. | |
| 89 for (int i = MINIMUM_PRIORITY; i <= MAXIMUM_PRIORITY; ++i) { | |
| 90 if (priority == i) | |
| 91 continue; | |
| 92 for (std::deque<PendingWrite>::const_iterator it = queue_[i].begin(); | |
| 93 it != queue_[i].end(); ++it) { | |
| 94 DCHECK_NE(it->stream.get(), stream.get()); | |
| 95 } | |
| 96 } | |
| 97 #endif | |
| 98 | |
| 99 // Defer deletion until queue iteration is complete, as | |
| 100 // SpdyBuffer::~SpdyBuffer() can result in callbacks into SpdyWriteQueue. | |
| 101 std::vector<SpdyBufferProducer*> erased_buffer_producers; | |
| 102 | |
| 103 // Do the actual deletion and removal, preserving FIFO-ness. | |
| 104 std::deque<PendingWrite>* queue = &queue_[priority]; | |
| 105 std::deque<PendingWrite>::iterator out_it = queue->begin(); | |
| 106 for (std::deque<PendingWrite>::const_iterator it = queue->begin(); | |
| 107 it != queue->end(); ++it) { | |
| 108 if (it->stream.get() == stream.get()) { | |
| 109 erased_buffer_producers.push_back(it->frame_producer); | |
| 110 } else { | |
| 111 *out_it = *it; | |
| 112 ++out_it; | |
| 113 } | |
| 114 } | |
| 115 queue->erase(out_it, queue->end()); | |
| 116 removing_writes_ = false; | |
| 117 STLDeleteElements(&erased_buffer_producers); // Invokes callbacks. | |
| 118 } | |
| 119 | |
| 120 void SpdyWriteQueue::RemovePendingWritesForStreamsAfter( | |
| 121 SpdyStreamId last_good_stream_id) { | |
| 122 CHECK(!removing_writes_); | |
| 123 removing_writes_ = true; | |
| 124 std::vector<SpdyBufferProducer*> erased_buffer_producers; | |
| 125 | |
| 126 for (int i = MINIMUM_PRIORITY; i <= MAXIMUM_PRIORITY; ++i) { | |
| 127 // Do the actual deletion and removal, preserving FIFO-ness. | |
| 128 std::deque<PendingWrite>* queue = &queue_[i]; | |
| 129 std::deque<PendingWrite>::iterator out_it = queue->begin(); | |
| 130 for (std::deque<PendingWrite>::const_iterator it = queue->begin(); | |
| 131 it != queue->end(); ++it) { | |
| 132 if (it->stream.get() && (it->stream->stream_id() > last_good_stream_id || | |
| 133 it->stream->stream_id() == 0)) { | |
| 134 erased_buffer_producers.push_back(it->frame_producer); | |
| 135 } else { | |
| 136 *out_it = *it; | |
| 137 ++out_it; | |
| 138 } | |
| 139 } | |
| 140 queue->erase(out_it, queue->end()); | |
| 141 } | |
| 142 removing_writes_ = false; | |
| 143 STLDeleteElements(&erased_buffer_producers); // Invokes callbacks. | |
| 144 } | |
| 145 | |
| 146 void SpdyWriteQueue::Clear() { | |
| 147 CHECK(!removing_writes_); | |
| 148 removing_writes_ = true; | |
| 149 std::vector<SpdyBufferProducer*> erased_buffer_producers; | |
| 150 | |
| 151 for (int i = MINIMUM_PRIORITY; i <= MAXIMUM_PRIORITY; ++i) { | |
| 152 for (std::deque<PendingWrite>::iterator it = queue_[i].begin(); | |
| 153 it != queue_[i].end(); ++it) { | |
| 154 erased_buffer_producers.push_back(it->frame_producer); | |
| 155 } | |
| 156 queue_[i].clear(); | |
| 157 } | |
| 158 removing_writes_ = false; | |
| 159 STLDeleteElements(&erased_buffer_producers); // Invokes callbacks. | |
| 160 } | |
| 161 | |
| 162 } // namespace net | |
| OLD | NEW |