| [/ |
| / Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| / |
| / Distributed under the Boost Software License, Version 1.0. (See accompanying |
| / file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| /] |
| |
| [section:read_write_operations Requirements on read and write operations] |
| |
| A ['read operation] is an operation that reads data into a mutable buffer |
| sequence argument of a type meeting [link asio.reference.MutableBufferSequence |
| `MutableBufferSequence`] requirements. The mutable buffer sequence specifies |
| memory where the data should be placed. A read operation shall always fill a |
| buffer in the sequence completely before proceeding to the next. |
| |
| A ['write operation] is an operation that writes data from a constant buffer |
| sequence argument of a type meeting [link asio.reference.ConstBufferSequence |
| `ConstBufferSequence`] requirements. The constant buffer sequence specifies |
| memory where the data to be written is located. A write operation shall always |
| write a buffer in the sequence completely before proceeding to the next. |
| |
| If a read or write operation is also an [link |
| asio.reference.asynchronous_operations asynchronous operation], the operation |
| shall maintain one or more copies of the buffer sequence until such time as the |
| operation no longer requires access to the memory specified by the buffers in |
| the sequence. The program shall ensure the memory remains valid until: |
| |
| [mdash] the last copy of the buffer sequence is destroyed, or |
| |
| [mdash] the completion handler for the asynchronous operation is invoked, |
| |
| whichever comes first. |
| |
| [endsect] |
