caf::net::octet_stream::lower_layer Class Reference

Provides access to a resource that operates on a byte stream, e.g., a TCP socket. More...

#include <lower_layer.hpp>

Inheritance diagram for caf::net::octet_stream::lower_layer:

Public Member Functions
virtual bool	is_reading () const noexcept=0
	Queries whether the transport is currently configured to read from its socket.
virtual void	configure_read (receive_policy policy)=0
	Configures threshold for the next receive operations.
virtual void	begin_output ()=0
	Prepares the layer for outgoing traffic, e.g., by allocating an output buffer as necessary.
virtual byte_buffer &	output_buffer ()=0
	Returns a reference to the output buffer.
virtual bool	end_output ()=0
	Prepares written data for transfer, e.g., by flushing buffers or registering sockets for write events.
virtual void	switch_protocol (std::unique_ptr< upper_layer > next)=0
	Asks the stream to swap the current upper layer with next after returning from consume().
virtual bool	switching_protocol () const noexcept=0
	Queries whether switch_protocol has been called.
Public Member Functions inherited from caf::net::generic_lower_layer
virtual multiplexer &	mpx () noexcept=0
	Returns the multiplexer instance that executes this protocol stack.
virtual bool	can_send_more () const noexcept=0
	Queries whether the output device can accept more data straight away.
virtual bool	is_reading () const noexcept=0
	Queries whether the lower layer is currently reading from its input device.
virtual void	write_later ()=0
	Triggers a write callback after the write device signals downstream capacity.
virtual void	shutdown ()=0
	Shuts down any connection or session gracefully.
virtual void	shutdown (const error &reason)
	Shuts down any connection or session du to an error.

Detailed Description

Provides access to a resource that operates on a byte stream, e.g., a TCP socket.

Member Function Documentation

configure_read()

virtual void caf::net::octet_stream::lower_layer::configure_read ( receive_policy  policy )

pure virtual

Configures threshold for the next receive operations.

Policies remain active until calling this function again.

Warning

Calling this function in consume invalidates both byte spans.

is_reading()

virtual bool caf::net::octet_stream::lower_layer::is_reading ( ) const

pure virtualnoexcept

Queries whether the transport is currently configured to read from its socket.

Implements caf::net::generic_lower_layer.

output_buffer()

virtual byte_buffer & caf::net::octet_stream::lower_layer::output_buffer ( )

pure virtual

Returns a reference to the output buffer.

Users may only call this function and write to the buffer between calling begin_output() and end_output().

switch_protocol()

virtual void caf::net::octet_stream::lower_layer::switch_protocol ( std::unique_ptr< upper_layer >  next )

pure virtual

Asks the stream to swap the current upper layer with next after returning from consume().

Note

may only be called from the upper layer in consume.

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The documentation for this class was generated from the following file:

• libcaf_net/caf/net/octet_stream/lower_layer.hpp