Landing Recent QUIC changes until Fri Nov 18 23:21:04 2016 +0000

net/quic/core/frames/quic_stream_frame.h

+// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef NET_QUIC_CORE_FRAMES_QUIC_STREAM_FRAME_H_
+#define NET_QUIC_CORE_FRAMES_QUIC_STREAM_FRAME_H_
+
+#include <memory>
+
+#include "base/strings/string_piece.h"
+#include "net/quic/core/quic_buffer_allocator.h"
+#include "net/quic/core/quic_types.h"
+
+namespace net {
+
+// Deleter for stream buffers. Copyable to support platforms where the deleter
+// of a unique_ptr must be copyable. Otherwise it would be nice for this to be
+// move-only.
+class NET_EXPORT_PRIVATE StreamBufferDeleter {
+ public:
+  StreamBufferDeleter() : allocator_(nullptr) {}
+  explicit StreamBufferDeleter(QuicBufferAllocator* allocator)
+      : allocator_(allocator) {}
+
+  // Deletes |buffer| using |allocator_|.
+  void operator()(char* buffer) const;
+
+ private:
+  // Not owned; must be valid so long as the buffer stored in the unique_ptr
+  // that owns |this| is valid.
+  QuicBufferAllocator* allocator_;
+};
+
+using UniqueStreamBuffer = std::unique_ptr<char[], StreamBufferDeleter>;
+
+// Allocates memory of size |size| using |allocator| for a QUIC stream buffer.
+NET_EXPORT_PRIVATE UniqueStreamBuffer
+NewStreamBuffer(QuicBufferAllocator* allocator, size_t size);
+
+struct NET_EXPORT_PRIVATE QuicStreamFrame {
+  QuicStreamFrame();
+  QuicStreamFrame(QuicStreamId stream_id,
+                  bool fin,
+                  QuicStreamOffset offset,
+                  base::StringPiece data);
+  QuicStreamFrame(QuicStreamId stream_id,
+                  bool fin,
+                  QuicStreamOffset offset,
+                  QuicPacketLength data_length,
+                  UniqueStreamBuffer buffer);
+  ~QuicStreamFrame();
+
+  friend NET_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
+                                                     const QuicStreamFrame& s);
+
+  QuicStreamId stream_id;
+  bool fin;
+  QuicPacketLength data_length;
+  const char* data_buffer;
+  QuicStreamOffset offset;  // Location of this data in the stream.
+  // nullptr when the QuicStreamFrame is received, and non-null when sent.
+  UniqueStreamBuffer buffer;
+
+ private:
+  QuicStreamFrame(QuicStreamId stream_id,
+                  bool fin,
+                  QuicStreamOffset offset,
+                  const char* data_buffer,
+                  QuicPacketLength data_length,
+                  UniqueStreamBuffer buffer);
+
+  DISALLOW_COPY_AND_ASSIGN(QuicStreamFrame);
+};
+static_assert(sizeof(QuicStreamFrame) <= 64,
+              "Keep the QuicStreamFrame size to a cacheline.");
+
+}  // namespace net
+
+#endif  // NET_QUIC_CORE_QUIC_FRAMES_H_