Run-Metronome-Tasks names a function, with lambda list NIL:
Runs tasks scheduled for the game's metronome.
Typically these tasks are scheduled in one of three ways. They may be scheduled to occur at a given frequency in seconds, at a single time, or at a give frequency up until a certain time.
Tasks are usually created by TOOTSVILLE DO-METRONOME, which in turn uses TOOTSVILLE METRONOME-REGISTER to safely enqueue the tasks with locking.
The metronome runs at approximately 1 second resolution, but steps its time forward at precisely 1 second intervals, so no task will be missed due to system scheduler tie-ups.
Tasks are not allowed to “stack up;” if a task has not finished by the time its next execution window comes around, it will miss its opportunity and have to wait for the next window.
Defined in file src/metronome.lisp.