The GC module provides an interface to Ruby's mark and
sweep garbage collection mechanism. Some of the underlying methods are also
available via the ObjectSpace module.
Disables garbage collection, returning true if garbage
collection was already disabled.
GC.disable #=> false GC.disable #=> true
VALUE
rb_gc_disable()
{
int old = dont_gc;
dont_gc = Qtrue;
return old;
}