Index · Directives systemd 246

Name

sd_bus_slot_get_bus, sd_bus_slot_get_current_handler, sd_bus_slot_get_current_message, sd_bus_slot_get_current_userdata — Query information attached to a bus slot object

Synopsis

#include <systemd/sd-bus.h>
typedef int (*sd_bus_message_handler_t)(sd_bus_message *m,
 void *userdata,
 sd_bus_error *ret_error);
 
sd_bus *sd_bus_slot_get_bus(sd_bus_slot *slot);
 
sd_bus_message_handler_t sd_bus_slot_get_current_handler (sd_bus_slot *slot);
 
sd_bus_message *sd_bus_slot_get_current_message(sd_bus_slot *slot);
 
void *sd_bus_slot_get_current_userdata(sd_bus_slot *slot);
 

Description

sd_bus_slot_get_bus() returns the bus object that message slot is attached to.

sd_bus_slot_get_current_handler(), sd_bus_slot_get_current_message() and sd_bus_slot_get_current_userdata() return the current handler, message and userdata respectively of the bus slot is attached to if we're currently executing the callback associated with slot.

Return Value

sd_bus_slot_get_bus() always returns the bus object.

On success, sd_bus_slot_get_current_handler(), sd_bus_slot_get_current_message() and sd_bus_slot_get_current_userdata() 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 libsystemd pkg-config(1) file.

See Also

systemd(1), sd-bus(3),