stream.write_at_least

Synopsis

local stream = require "stream"
stream.write_at_least(io_object, buffer: byte_span, minimum: integer) -> integer

Description

Write data until a minimum number of bytes has been transferred and blocks current fiber until it completes or errs.

Returns the number of bytes written.

As in Boost.Asio:

This operation is implemented in terms of zero or more calls to the stream’s async_write_some function, and is known as a composed operation. The program must ensure that the stream performs no other write operations (such as async_write, the stream’s async_write_some function, or any other composed operations that perform writes) until this operation completes.