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Implement sync::rwlock::write_cond (and task::rekillable)

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This commit is contained in:
Ben Blum
2012-08-09 23:15:30 -04:00
parent 4c9f168372
commit e1086b0175
2 changed files with 74 additions and 19 deletions
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20
src/libcore/task.rs
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@@ -56,7 +56,7 @@ export try;
export yield;
export failing;
export get_task;
export unkillable;
export unkillable, rekillable;
export atomically;
export local_data_key;
@@ -572,7 +572,7 @@ fn get_task() -> task {
* }
* ~~~
*/
unsafe fn unkillable(f: fn()) {
unsafe fn unkillable<U>(f: fn() -> U) -> U {
class allow_failure {
let t: *rust_task;
new(t: *rust_task) { self.t = t; }
@@ -582,7 +582,21 @@ unsafe fn unkillable(f: fn()) {
let t = rustrt::rust_get_task();
let _allow_failure = allow_failure(t);
rustrt::rust_task_inhibit_kill(t);
f();
f()
}
/// The inverse of unkillable. Only ever to be used nested in unkillable().
unsafe fn rekillable<U>(f: fn() -> U) -> U {
class disallow_failure {
let t: *rust_task;
new(t: *rust_task) { self.t = t; }
drop { rustrt::rust_task_inhibit_kill(self.t); }
}
let t = rustrt::rust_get_task();
let _allow_failure = disallow_failure(t);
rustrt::rust_task_allow_kill(t);
f()
}
/**