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// 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.
#include <stddef.h>
#include <memory>
#include "absl/strings/string_view.h"
#include "common/platform/api/quiche_export.h"
namespace spdy {
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 QUICHE_EXPORT_PRIVATE SpdyPinnableBufferPiece {
const char* buffer() const { return buffer_; }
explicit operator absl::string_view() const {
return absl::string_view(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);
friend class SpdyPrefixedBufferReader;
const char* buffer_;
size_t length_;
// Null iff |buffer_| isn't pinned.
std::unique_ptr<char[]> storage_;
} // namespace spdy