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rewrite arc to use region & expressions (also making it pass borrowck)

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This commit is contained in:
Niko Matsakis 2012-05-23 19:21:50 -07:00
parent 4fec4cd8f5
commit 6ca6a3b80b
1 changed files with 4 additions and 5 deletions
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9
src/libstd/arc.rs
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@ -6,11 +6,11 @@ export arc, get, clone;
#[abi = "cdecl"]
native mod rustrt {
#[rust_stack]
fn rust_atomic_increment(p: *mut libc::intptr_t)
fn rust_atomic_increment(p: &mut libc::intptr_t)
-> libc::intptr_t;
#[rust_stack]
fn rust_atomic_decrement(p: *mut libc::intptr_t)
fn rust_atomic_decrement(p: &mut libc::intptr_t)
-> libc::intptr_t;
}
@ -21,7 +21,7 @@ type arc_data<T> = {
resource arc_destruct<T>(data: *arc_data<T>) {
unsafe {
let ptr = ptr::mut_addr_of((*data).count);
let ptr = &mut (*data).count;
let new_count = rustrt::rust_atomic_decrement(ptr);
assert new_count >= 0;
@ -52,8 +52,7 @@ fn get<T>(rc: &a.arc<T>) -> &a.T {
fn clone<T>(rc: &arc<T>) -> arc<T> {
let data = **rc;
unsafe {
rustrt::rust_atomic_increment(
ptr::mut_addr_of((*data).count));
rustrt::rust_atomic_increment(&mut (*data).count);
}
arc_destruct(**rc)
}