sd_bus_slot_get_bus - Man Page

#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);

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​.

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​.

Functions described here are available as a shared library, which can be compiled against and linked to with the libsystemd ​pkg-config(1) file​.

All functions listed here are thread-agnostic and only a single thread may operate on a given object at any given time​. Different threads may access the same object at different times​. Multiple independent objects may be used from different threads in parallel​.

The code described here uses getenv(3), which is declared to be not multi-thread-safe​. This means that the code calling the functions described here must not call setenv(3) from a parallel thread​. It is recommended to only do calls to setenv() from an early phase of the program when no other threads have been started​.

sd_bus_slot_get_bus(), sd_bus_slot_get_current_handler(), sd_bus_slot_get_current_message(), and sd_bus_slot_get_current_userdata() were added in version 246​.

systemd(1), sd-bus(3)

sd-bus(3), sd_bus_slot_set_userdata(3), systemd.directives(7), systemd.index(7).

The man pages sd_bus_slot_get_current_handler(3), sd_bus_slot_get_current_message(3) and sd_bus_slot_get_current_userdata(3) are aliases of sd_bus_slot_get_bus(3).