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### posix::stream_descriptor

Typedef for the typical usage of a stream-oriented descriptor.

    typedef basic_stream_descriptor stream_descriptor;

##### Types

Name | Description
--- | ---
bytes_readable | IO control command to get the amount of data that can be read without blocking.
implementation_type | The underlying implementation type of I/O object.
lowest_layer_type | A basic_descriptor is always the lowest layer.
native_type | The native representation of a descriptor.
non_blocking_io | IO control command to set the blocking mode of the descriptor.
service_type | The type of the service that will be used to provide I/O operations.

##### Member Functions

Name | Description
--- | ---
assign | Assign an existing native descriptor to the descriptor.
async_read_some | Start an asynchronous read.
async_write_some | Start an asynchronous write.
basic_stream_descriptor | Construct a basic_stream_descriptor without opening it. Construct a basic_stream_descriptor on an existing native descriptor.
cancel | Cancel all asynchronous operations associated with the descriptor.
close | Close the descriptor.
get_io_service | Get the io_service associated with the object.
io_control | Perform an IO control command on the descriptor.
io_service | (Deprecated: use get_io_service().) Get the io_service associated with the object.
is_open | Determine whether the descriptor is open.
lowest_layer | Get a reference to the lowest layer. Get a const reference to the lowest layer.
native | Get the native descriptor representation.
read_some | Read some data from the descriptor.
write_some | Write some data to the descriptor.

##### Protected Data Members

Name | Description
--- | ---
implementation | The underlying implementation of the I/O object.
service | The service associated with the I/O object.

The `posix::basic_stream_descriptor` class template provides asynchronous and blocking stream-oriented descriptor functionality.

##### Thread Safety

Distinct objects: Safe.

Shared objects: Unsafe.

##### Requirements

Header: `boost/asio/posix/stream_descriptor.hpp`

Convenience header: `boost/asio.hpp`