sd_bus_get_current_handler - Query information of the callback a bus object is currently running

NAME SYNOPSIS DESCRIPTION RETURN VALUE NOTES SEE ALSO

NAME

sd_bus_get_current_handler, sd_bus_get_current_message, sd_bus_get_current_slot, sd_bus_get_current_userdata − Query information of the callback a bus object is currently running

SYNOPSIS

#include <elogind/sd−bus.h>

	typedef int (sd_bus_message_handler_t)(sd_bus_message m, void *userdata, sd_bus_error *ret_error);
	sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus);
	sd_bus_message* sd_bus_get_current_message(sd_bus *bus);
	sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus);
	void* sd_bus_get_current_userdata(sd_bus *bus);

Whenever sd−bus is about to invoke a user−supplied callback function, it stores the current callback, D−Bus message, slot and userdata pointer and allows these to be queried via sd_bus_get_current_handler(), sd_bus_get_current_message(), sd_bus_get_current_slot() and sd_bus_get_current_userdata(), respectively. If bus cannot be resolved or if execution does not reside in a user−supplied callback of bus, these functions return NULL.

RETURN VALUE

On success, these functions return the requested object. On failure, they return NULL.

NOTES

These APIs are implemented as a shared library, which can be compiled and linked to with the libelogind pkg-config(1) file.