[−][src]Function glsp::write_barrier
pub fn write_barrier(rdata: &Root<RData>)
Notifies the garbage collector that an RData
has been mutated.
You don't need to call this function for every mutation. It only needs to be called when the
RData
now owns Gc
pointers which it didn't own before the mutation.
Under those circumstances, the RData
must be passed to glsp::write_barrier
at least
once before the next call to glsp::gc
.
If glsp::write_barrier
is not called, then the glsp::gc
call might invalidate
the RData
's Gc
pointers, causing Gc::upgrade
to return None
.