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58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
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// Copyright 2017 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_QUIC_PLATFORM_API_QUIC_MEM_SLICE_H_
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#define NET_QUIC_PLATFORM_API_QUIC_MEM_SLICE_H_
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#include "net/quic/platform/impl/quic_mem_slice_impl.h"
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namespace net {
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// QuicMemSlice is an internally reference counted data buffer used as the
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// source buffers for write operations. QuicMemSlice implicitly maintains a
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// reference count and will free the underlying data buffer when the reference
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// count reaches zero.
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class QUIC_EXPORT_PRIVATE QuicMemSlice {
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public:
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// Constructs a empty QuicMemSlice with no underlying data and 0 reference
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// count.
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QuicMemSlice() = default;
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// Let |allocator| allocate a data buffer of |length|, then construct
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// QuicMemSlice with reference count 1 from the allocated data buffer.
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// Once all of the references to the allocated data buffer are released,
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// |allocator| is responsible to free the memory. |allocator| must
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// not be null, and |length| must not be 0. To construct an empty
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// QuicMemSlice, use the zero-argument constructor instead.
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QuicMemSlice(QuicBufferAllocator* allocator, size_t length)
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: impl_(allocator, length) {}
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// Constructs QuicMemSlice from |impl|. It takes the reference away from
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// |impl|.
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explicit QuicMemSlice(QuicMemSliceImpl impl) : impl_(std::move(impl)) {}
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QuicMemSlice(const QuicMemSlice& other) = delete;
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QuicMemSlice& operator=(const QuicMemSlice& other) = delete;
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// Move constructors. |other| will not hold a reference to the data buffer
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// after this call completes.
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QuicMemSlice(QuicMemSlice&& other) = default;
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QuicMemSlice& operator=(QuicMemSlice&& other) = default;
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~QuicMemSlice() = default;
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// Returns a const char pointer to underlying data buffer.
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const char* data() const { return impl_.data(); }
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// Returns the length of underlying data buffer.
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size_t length() const { return impl_.length(); }
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bool empty() const { return impl_.empty(); }
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private:
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QuicMemSliceImpl impl_;
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};
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} // namespace net
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#endif // NET_QUIC_PLATFORM_API_QUIC_MEM_SLICE_H_
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