Function stacker::maybe_grow
[−]
[src]
pub fn maybe_grow<R, F: FnOnce() -> R>(
red_zone: usize,
stack_size: usize,
f: F
) -> R
Grows the call stack if necessary.
This function is intended to be called at manually instrumented points in a
program where recursion is known to happen quite a bit. This function will
check to see if we're within red_zone bytes of the end of the stack, and
if so it will allocate a new stack of size stack_size.
The closure f is guaranteed to run on a stack with at least red_zone
bytes, and it will be run on the current stack if there's space available.