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arc.rs: make exclusive's data mutable

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This commit is contained in:
Ben Blum 2012-07-10 18:55:49 -04:00
parent 9c0b469613
commit 152f2eade8
1 changed files with 3 additions and 3 deletions
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6
src/libcore/arc.rs
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@ -84,7 +84,7 @@ fn clone<T: const send>(rc: &arc<T>) -> arc<T> {
}
// An arc over mutable data that is protected by a lock.
type ex_data<T: send> = {lock: sys::lock_and_signal, data: T};
type ex_data<T: send> = {lock: sys::lock_and_signal, mut data: T};
type exclusive<T: send> = arc_destruct<ex_data<T>>;
fn exclusive<T:send >(-data: T) -> exclusive<T> {
@ -110,12 +110,12 @@ impl methods<T: send> for exclusive<T> {
arc_destruct(self.data)
}
unsafe fn with<U>(f: fn(sys::condition, x: &T) -> U) -> U {
unsafe fn with<U>(f: fn(sys::condition, x: &mut T) -> U) -> U {
let ptr: ~arc_data<ex_data<T>> =
unsafe::reinterpret_cast(self.data);
let r = {
let rec: &ex_data<T> = &(*ptr).data;
rec.lock.lock_cond(|c| f(c, &rec.data))
rec.lock.lock_cond(|c| f(c, &mut rec.data))
};
unsafe::forget(ptr);
r