double flux_reactor_now (flux_reactor_t *r);

void flux_reactor_now_update (flux_reactor_t *r);

double flux_reactor_time (void);

Link with -lflux-core.


flux_reactor_now() returns the current reactor time, which is the time the reactor began processing events. The time will not be updated until the reactor runs out of events and wakes up again. This is a lighter weight alternative to system calls when only coarse event timing is needed, e.g. when all events processed in a given wakeup can be considered simultaneous.

flux_reactor_now_update() forces an update to reactor time. This may be useful when the reactor has not run for a while and timing calculations relative to reactor time need to be made, for example when creating timer watchers.

flux_reactor_time() returns the system time as a double. Reactor time is a snapshot of flux_reactor_time().

Note: the Flux reactor is based on libev. For additional information on the behavior of reactor time, refer to the libev documentation on ev_now and ev_now_update().


Flux: http://flux-framework.org

Flux RFC: https://flux-framework.readthedocs.io/projects/flux-rfc

libev: http://software.schmorp.de/pkg/libev.html