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>
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typedef int (*sd_bus_message_handler_t)(sd_bus_message *m, void *userdata, sd_bus_error *ret_error); | |
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sd_bus *sd_bus_slot_get_bus(sd_bus_slot *slot); | |
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sd_bus_message_handler_t sd_bus_slot_get_current_handler(sd_bus_slot *slot); | |
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sd_bus_message *sd_bus_slot_get_current_message(sd_bus_slot *slot); | |
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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
Functions described here are available as a shared library, which can be compiled against and linked to with the libsystemd pkg-config(1) file.
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.
HISTORY
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.