mirror of https://gitee.com/bigwinds/arangodb
56 lines
2.2 KiB
Plaintext
56 lines
2.2 KiB
Plaintext
[/
|
|
/ 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:AsyncWriteStream Buffer-oriented asynchronous write stream requirements]
|
|
|
|
In the table below, `a` denotes an asynchronous write stream object, `cb`
|
|
denotes an object satisfying [link boost_asio.reference.ConstBufferSequence
|
|
constant buffer sequence] requirements, and `h` denotes an object satisfying
|
|
[link boost_asio.reference.WriteHandler write handler] requirements.
|
|
|
|
[table Buffer-oriented asynchronous write stream requirements
|
|
[[operation] [type] [semantics, pre/post-conditions]]
|
|
[
|
|
[`a.get_io_service();`]
|
|
[`io_service&`]
|
|
[Returns the `io_service` object through which the `async_write_some`
|
|
handler `h` will be invoked.]
|
|
]
|
|
[
|
|
[`a.async_write_some(cb, h);`]
|
|
[`void`]
|
|
[
|
|
Initiates an asynchronous operation to write one or more bytes of data to
|
|
the stream `a`. The operation is performed via the `io_service` object
|
|
`a.get_io_service()` and behaves according to [link
|
|
boost_asio.reference.asynchronous_operations asynchronous operation]
|
|
requirements.\n
|
|
\n
|
|
The constant buffer sequence `cb` specifies memory where the data to be
|
|
written is located. The `async_write_some` operation shall always write a
|
|
buffer in the sequence completely before proceeding to the next.\n
|
|
\n
|
|
The implementation shall maintain one or more copies of `cb` until such
|
|
time as the write operation no longer requires access to the memory
|
|
specified by the buffers in the sequence. The program must ensure the
|
|
memory is valid until:\n
|
|
\n
|
|
[mdash] the last copy of `cb` is destroyed, or\n
|
|
\n
|
|
[mdash] the handler for the asynchronous write operation is invoked,\n
|
|
\n
|
|
whichever comes first.\n
|
|
\n
|
|
If the total size of all buffers in the sequence `cb` is `0`, the
|
|
asynchronous write operation shall complete immediately and pass `0` as
|
|
the argument to the handler that specifies the number of bytes written.
|
|
]
|
|
]
|
|
]
|
|
|
|
[endsect]
|