| // Copyright 2014 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_SPDY_SPDY_PINNABLE_BUFFER_PIECE_H_ |
| #define NET_SPDY_SPDY_PINNABLE_BUFFER_PIECE_H_ |
| |
| #include <stddef.h> |
| |
| #include <memory> |
| |
| #include "base/strings/string_piece.h" |
| #include "net/base/net_export.h" |
| |
| namespace net { |
| |
| class SpdyPrefixedBufferReader; |
| |
| // Helper class of SpdyPrefixedBufferReader. |
| // Represents a piece of consumed buffer which may (or may not) own its |
| // underlying storage. Users may "pin" the buffer at a later time to ensure |
| // a SpdyPinnableBufferPiece owns and retains storage of the buffer. |
| struct NET_EXPORT_PRIVATE SpdyPinnableBufferPiece { |
| public: |
| SpdyPinnableBufferPiece(); |
| ~SpdyPinnableBufferPiece(); |
| |
| const char * buffer() const { |
| return buffer_; |
| } |
| |
| size_t length() const { |
| return length_; |
| } |
| |
| operator base::StringPiece() const { |
| return base::StringPiece(buffer_, length_); |
| } |
| |
| // Allocates and copies the buffer to internal storage. |
| void Pin(); |
| |
| bool IsPinned() const { return storage_ != nullptr; } |
| |
| // Swaps buffers, including internal storage, with |other|. |
| void Swap(SpdyPinnableBufferPiece* other); |
| |
| private: |
| friend class SpdyPrefixedBufferReader; |
| |
| const char * buffer_; |
| size_t length_; |
| // Null iff |buffer_| isn't pinned. |
| std::unique_ptr<char[]> storage_; |
| }; |
| |
| } // namespace net |
| |
| #endif // NET_SPDY_SPDY_PINNABLE_BUFFER_PIECE_H_ |