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// Copyright 2017 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 <memory>
#include "quiche_platform_impl/quiche_mem_slice_impl.h"
#include "absl/strings/string_view.h"
#include "quic/core/quic_buffer_allocator.h"
#include "common/platform/api/quiche_export.h"
namespace quiche {
// QuicheMemSlice is a wrapper around a platform-specific I/O buffer type. It
// may be reference counted, though QUICHE itself does not rely on that.
class QUICHE_EXPORT_PRIVATE QuicheMemSlice {
// Constructs a empty QuicheMemSlice with no underlying data.
QuicheMemSlice() = default;
// Constructs a QuicheMemSlice that takes ownership of |buffer|. The length
// of the |buffer| must not be zero. To construct an empty QuicheMemSlice,
// use the zero-argument constructor instead.
explicit QuicheMemSlice(quic::QuicBuffer buffer) : impl_(std::move(buffer)) {}
// Constructs a QuicheMemSlice that takes ownership of |buffer| allocated on
// heap. |length| must not be zero.
QuicheMemSlice(std::unique_ptr<char[]> buffer, size_t length)
: impl_(std::move(buffer), length) {}
// Constructs QuicheMemSlice from |impl|. It takes the reference away from
// |impl|.
explicit QuicheMemSlice(QuicheMemSliceImpl impl) : impl_(std::move(impl)) {}
QuicheMemSlice(const QuicheMemSlice& other) = delete;
QuicheMemSlice& operator=(const QuicheMemSlice& other) = delete;
// Move constructors. |other| will not hold a reference to the data buffer
// after this call completes.
QuicheMemSlice(QuicheMemSlice&& other) = default;
QuicheMemSlice& operator=(QuicheMemSlice&& other) = default;
~QuicheMemSlice() = default;
// Release the underlying reference. Further access the memory will result in
// undefined behavior.
void Reset() { impl_.Reset(); }
// Returns a const char pointer to underlying data buffer.
const char* data() const { return; }
// Returns the length of underlying data buffer.
size_t length() const { return impl_.length(); }
// Returns the representation of the underlying data as a string view.
absl::string_view AsStringView() const {
return absl::string_view(data(), length());
bool empty() const { return impl_.empty(); }
QuicheMemSliceImpl* impl() { return &impl_; }
QuicheMemSliceImpl impl_;
} // namespace quiche