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Make rekillable consistent with unkillable

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As for now, rekillable is an unsafe function, instead, it should behave
just like unkillable by encapsulating unsafe code within an unsafe
block.

This patch does that and removes unsafe blocks that were encapsulating
rekillable calls throughout rust's libs.

Fixes #8232
This commit is contained in:
Flaper Fesp 2013-08-18 00:51:39 +02:00
parent 9cd91c8cc4
commit cd92d2c77f
2 changed files with 46 additions and 45 deletions
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43
src/libstd/task/mod.rs
View file

@ -597,21 +597,34 @@ pub fn unkillable<U>(f: &fn() -> U) -> U {
}
}
/// The inverse of unkillable. Only ever to be used nested in unkillable().
pub unsafe fn rekillable<U>(f: &fn() -> U) -> U {
/**
* Makes killable a task marked as unkillable
*
* # Example
*
* ~~~
* do task::unkillable {
* do task::rekillable {
* // Task is killable
* }
* }
*/
pub fn rekillable<U>(f: &fn() -> U) -> U {
use rt::task::Task;
if in_green_task_context() {
let t = Local::unsafe_borrow::<Task>();
do (|| {
(*t).death.allow_kill((*t).unwinder.unwinding);
unsafe {
if in_green_task_context() {
let t = Local::unsafe_borrow::<Task>();
do (|| {
(*t).death.allow_kill((*t).unwinder.unwinding);
f()
}).finally {
(*t).death.inhibit_kill((*t).unwinder.unwinding);
}
} else {
// FIXME(#3095): As in unkillable().
f()
}).finally {
(*t).death.inhibit_kill((*t).unwinder.unwinding);
}
} else {
// FIXME(#3095): As in unkillable().
f()
}
}
@ -646,11 +659,9 @@ fn test_kill_rekillable_task() {
do run_in_newsched_task {
do task::try {
do task::unkillable {
unsafe {
do task::rekillable {
do task::spawn {
fail!();
}
do task::rekillable {
do task::spawn {
fail!();
}
}
}