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libstd: Remove two uses of Cell.

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This commit is contained in:
Patrick Walton 2013-12-05 17:36:30 -08:00
parent 89e1db3d6c
commit 6113508055
2 changed files with 4 additions and 6 deletions
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5
src/libstd/rt/deque.rs
View File

@ -163,10 +163,9 @@ impl<T: Send> BufferPool<T> {
fn free(&mut self, buf: ~Buffer<T>) {
unsafe {
use cell::Cell;
let buf = Cell::new(buf);
let mut buf = Some(buf);
self.pool.with(|pool| {
let buf = buf.take();
let buf = buf.take_unwrap();
match pool.iter().position(|v| v.size() > buf.size()) {
Some(i) => pool.insert(i, buf),
None => pool.push(buf),

5
src/libstd/rt/task.rs
View File

@ -19,7 +19,6 @@ use prelude::*;
use borrow;
use cast::transmute;
use cell::Cell;
use cleanup;
use libc::{c_void, uintptr_t, c_char, size_t};
use local_data;
@ -427,7 +426,6 @@ impl Coroutine {
}
fn build_start_wrapper(start: proc()) -> proc() {
let start_cell = Cell::new(start);
let wrapper: proc() = proc() {
// First code after swap to this new context. Run our
// cleanup job.
@ -446,6 +444,7 @@ impl Coroutine {
// need to unsafe_borrow.
let task: *mut Task = Local::unsafe_borrow();
let mut start_cell = Some(start);
(*task).run(|| {
// N.B. Removing `start` from the start wrapper
// closure by emptying a cell is critical for
@ -457,7 +456,7 @@ impl Coroutine {
// be in task context. By moving `start` out of
// the closure, all the user code goes our of
// scope while the task is still running.
let start = start_cell.take();
let start = start_cell.take_unwrap();
start();
});
}