use super::prelude::*;
extern "C" {
// void rb_gc_adjust_memory_usage(ssize_t diff)
pub fn rb_gc_adjust_memory_usage(diff: isize);
// size_t rb_gc_count(void)
pub fn rb_gc_count() -> usize;
// VALUE rb_gc_disable(void)
pub fn rb_gc_disable() -> VALUE;
// VALUE rb_gc_enable(void)
pub fn rb_gc_enable() -> VALUE;
// void rb_gc_force_recycle(VALUE obj)
pub fn rb_gc_force_recycle(obj: VALUE);
// VALUE rb_gc_latest_gc_info(VALUE key)
pub fn rb_gc_latest_gc_info(key: VALUE) -> VALUE;
// VALUE rb_gc_start(void)
pub fn rb_gc_start() -> VALUE;
// size_t rb_gc_stat(VALUE key)
pub fn rb_gc_stat(key: VALUE) -> usize;
// void rb_gc_mark(VALUE ptr)
pub fn rb_gc_mark(ptr: VALUE);
// void rb_gc_mark_maybe(VALUE obj)
pub fn rb_gc_mark_maybe(obj: VALUE);
// void rb_gc_register_address(VALUE *addr)
pub fn rb_gc_register_address(addr: *mut VALUE);
// void rb_gc_register_mark_object(VALUE obj)
pub fn rb_gc_register_mark_object(obj: VALUE);
// void rb_gc_unregister_address(VALUE *addr)
pub fn rb_gc_unregister_address(addr: *mut VALUE);
}