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posix::basic_descriptor::lowest_layer_type

A posix::basic_descriptor is always the lowest layer.

typedef basic_descriptor< DescriptorService > lowest_layer_type;
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_handle_type

The native representation of a descriptor.

native_type

(Deprecated: Use native_handle_type.) The native representation of a descriptor.

non_blocking_io

(Deprecated: Use non_blocking().) 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.

basic_descriptor

Construct a basic_descriptor without opening it.

Construct a basic_descriptor on an existing native descriptor.

Move-construct a basic_descriptor from another.

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.

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

(Deprecated: Use native_handle().) Get the native descriptor representation.

native_handle

Get the native descriptor representation.

native_non_blocking

Gets the non-blocking mode of the native descriptor implementation.

Sets the non-blocking mode of the native descriptor implementation.

non_blocking

Gets the non-blocking mode of the descriptor.

Sets the non-blocking mode of the descriptor.

operator=

Move-assign a basic_descriptor from another.

release

Release ownership of the native descriptor implementation.

Protected Member Functions

Name

Description

get_implementation

Get the underlying implementation of the I/O object.

get_service

Get the service associated with the I/O object.

~basic_descriptor

Protected destructor to prevent deletion through this type.

Protected Data Members

Name

Description

implementation

(Deprecated: Use get_implementation().) The underlying implementation of the I/O object.

service

(Deprecated: Use get_service().) The service associated with the I/O object.

The posix::basic_descriptor class template provides the ability to wrap a POSIX descriptor.

Thread Safety

Distinct objects: Safe.

Shared objects: Unsafe.

Requirements

Header: boost/asio/posix/basic_descriptor.hpp

Convenience header: boost/asio.hpp


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