sd_event_set_exit_on_idle - Man Page

Enable event loop exit-on-idle support

Synopsis

#include <systemd/sd-event.h>

int sd_event_set_exit_on_idle(sd_event *event, int b);

int sd_event_get_exit_on_idle(sd_event *event);

sd_event_set_exit_on_idle() may be used to enable or disable the exit-on-idle support in the event loop object specified in the event parameter. If enabled, the event loop will exit with a zero exit code there are no more enabled (SD_EVENT_ON, SD_EVENT_ONESHOT), non-exit, non-post event sources.

sd_event_get_exit_on_idle() may be used to determine whether exit-on-idle support was previously requested by a call to sd_event_set_exit_on_idle() with a true b parameter and successfully enabled.

Return Value

On success, sd_event_set_exit_on_idle() and sd_event_get_exit_on_idle() return a non-zero positive integer if the exit-on-idle support was successfully enabled. They return zero if the exit-on-idle support was explicitly disabled with a false b parameter. On failure, they return a negative errno-style error code.

Errors

Returned errors may indicate the following problems:

-ECHILD: The event loop has been created in a different process, library or module instance.
-EINVAL: The passed event loop object was invalid.

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.

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.