| // 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. |
| |
| #ifndef QUICHE_SPDY_CORE_ZERO_COPY_OUTPUT_BUFFER_H_ |
| #define QUICHE_SPDY_CORE_ZERO_COPY_OUTPUT_BUFFER_H_ |
| |
| #include <cstdint> |
| |
| #include "quiche/common/platform/api/quiche_export.h" |
| |
| namespace spdy { |
| |
| class QUICHE_EXPORT ZeroCopyOutputBuffer { |
| public: |
| virtual ~ZeroCopyOutputBuffer() {} |
| |
| // Returns the next available segment of memory to write. Will always return |
| // the same segment until AdvanceWritePtr is called. |
| virtual void Next(char** data, int* size) = 0; |
| |
| // After writing to a buffer returned from Next(), the caller should call |
| // this method to indicate how many bytes were written. |
| virtual void AdvanceWritePtr(int64_t count) = 0; |
| |
| // Returns the available capacity of the buffer. |
| virtual uint64_t BytesFree() const = 0; |
| }; |
| |
| } // namespace spdy |
| |
| #endif // QUICHE_SPDY_CORE_ZERO_COPY_OUTPUT_BUFFER_H_ |