Implementation of connection on top of POSIX message queues. More...

#include <eagine/message_bus/posix_mqueue.hpp>

Public Types
using	fetch_handler = connection::fetch_handler
	Alias for received message fetch handler callable.

Public Types inherited from eagine::msgbus::connection
using	fetch_handler = callable_ref< bool(message_id, message_age, const message_view &)>
	Alias for fetch handler callable reference type.

Public Types inherited from eagine::named_logging_object< main_ctx_log_backend_getter >
using	entry_type = std::conditional_t< is_log_level_enabled_v< severity >, log_entry, no_log_entry >
	The entry type for the specified log_event_severity. More...

Public Types inherited from eagine::basic_logger< main_ctx_log_backend_getter >
using	entry_type = std::conditional_t< is_log_level_enabled_v< severity >, log_entry, no_log_entry >
	The entry type for the specified log_event_severity. More...

Public Member Functions
	posix_mqueue_connection (main_ctx_parent parent)
	Construction from parent main context object.

auto	open (std::string name) -> bool
	Opens the connection.

auto	is_usable () -> bool final
	Checks if the connection is in usable state.

auto	max_data_size () -> valid_if_positive< span_size_t > final
	Returns the maximum data block size in bytes that can be sent.

auto	update () -> bool override
	Updates the internal state of the connection (called repeatedly). More...

auto	send (message_id msg_id, const message_view &message) -> bool final
	Sent a message with the specified id. More...

auto	fetch_messages (fetch_handler handler) -> bool final
	Fetch all enqueued messages that have been received since last fetch. More...

Public Member Functions inherited from eagine::msgbus::posix_mqueue_connection_info< connection >
auto	kind () -> connection_kind final

auto	addr_kind () -> connection_addr_kind final

auto	type_id () -> identifier final

Public Member Functions inherited from eagine::msgbus::connection
virtual void	cleanup ()
	Cleans up the connection before destroying it.

Public Member Functions inherited from eagine::interface< connection_info >
constexpr	interface (const interface &)=delete
	Not copyable.

auto	operator= (interface &&)=delete
	Not move assignable.

auto	operator= (const interface &)=delete
	Not copy assignable.

Public Member Functions inherited from eagine::main_ctx_object
	main_ctx_object (identifier obj_id, main_ctx_parent parent) noexcept
	Initialization from object id and parent.

auto	process_instance_id () const noexcept -> process_instance_id_t
	Returns the process id.

auto	main_context () const noexcept -> main_ctx &
	Returns a reference to the main context singleton.

auto	app_config () const noexcept -> application_config &
	Returns a reference to the application config object.

auto	as_parent () noexcept -> main_ctx_object_parent_info
	Returns this as main_ctx_object_parent_info.

template<typename T >
auto	cfg_init (string_view key, T initial, string_view tag={}) -> T
	Reads and returns the configuration value identified by `key`.

template<typename Extractable , typename T >
auto	cfg_extr (string_view key, T initial, string_view tag={}, type_identity< Extractable >={}) -> T
	Reads and returns the configuration value identified by `key`.

Public Member Functions inherited from eagine::named_logging_object< main_ctx_log_backend_getter >
	named_logging_object (identifier id, main_ctx_log_backend_getter backend_getter) noexcept
	Constructor from identifier and backend_getter object. More...

	named_logging_object (identifier id, const named_logging_object &parent) noexcept
	Constructor from logger id and parent logging object.

	named_logging_object () noexcept=default
	Construct logging object without backend.

	named_logging_object (named_logging_object &&temp) noexcept
	Move constructor.

	named_logging_object (const named_logging_object &that) noexcept
	Copy constructor.

auto	operator= (named_logging_object &&) noexcept -> named_logging_object &=default
	Move assignment operator.

auto	operator= (const named_logging_object &) -> named_logging_object &=default
	Copy assignment operator.

constexpr auto	object_id () const noexcept
	Returns the identifier of this logging object.

void	object_description (string_view display_name, string_view description) noexcept
	Sets the human-readable name and description of this object.

auto	log_fatal (string_view format) noexcept
	Create a log message entry for fatal error, with specified format. More...

auto	log_error (string_view format) noexcept
	Create a log message entry for error, with specified format. More...

auto	log_warning (string_view format) noexcept
	Create a log message entry for warning, with specified format. More...

auto	log_info (string_view format) noexcept
	Create a log message entry for information, with specified format. More...

auto	log_stat (string_view format) noexcept
	Create a log message entry for statistic, with specified format. More...

auto	log_debug (string_view format) noexcept
	Create a log message entry for debugging, with specified format. More...

auto	log_trace (string_view format) noexcept
	Create a log message entry for tracing, with specified format. More...

auto	log_backtrace (string_view format) noexcept
	Create a log message entry for backtracing, with specified format. More...

auto	log_debug_stream () noexcept
	Returns a log entry stream for debug messages. More...

auto	log_error_stream () noexcept
	Returns a log entry stream for error messages. More...

auto	log_chart_sample (identifier series, float value) noexcept -> named_logging_object &
	Stores a new `value` in the specified chart data `series`.

auto	log_chart_sample (identifier series, const tagged_quantity< T, U > &qty) noexcept -> std::enable_if_t< std::is_convertible_v< T, float >, named_logging_object & >
	Stores a new `value` in the specified chart data `series`.

auto	log_chart_sample (identifier series, const valid_if< T, P > &opt_value) noexcept -> named_logging_object &
	Stores a new `value` in the specified chart data `series`.

Public Member Functions inherited from eagine::basic_logger< main_ctx_log_backend_getter >
auto	backend () noexcept
	Returns a pointer to the backend of this logger object.

auto	instance_id () const noexcept -> logger_instance_id
	Returns the unique id of this logger instance.

Additional Inherited Members
Protected Member Functions inherited from eagine::interface< connection_info >
constexpr	interface () noexcept=default
	Default constructible by derived.

constexpr	interface (interface &&) noexcept=default
	Move constructible by derived.