pub fn floatsecondssetfn(x: f64)Expand description
Port of floatsecondssetfn(UNUSED(Param pm), double x) from Src/params.c:4603. C body:
shtimer.tv_sec = now.tv_sec - (zlong)x; shtimer.tv_nsec = now.tv_nsec - (x-int)*1e9;
WARNING: param names don’t match C — Rust=(x) vs C=(pm, x)