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task: make LocalSet non-Send (#2398)

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This does not count as a breaking change as it fixes a
regression and a soundness bug.
This commit is contained in:
Alice Ryhl
2020-04-12 14:55:37 -07:00
committed by GitHub
parent f39c15334e
commit 4fc2adae4f
2 changed files with 44 additions and 0 deletions
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tokio/tests/async_send_sync.rs
+39
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@@ -41,6 +41,44 @@ macro_rules! into_todo {
x
}};
}
macro_rules! assert_value {
($type:ty: Send & Sync) => {
#[allow(unreachable_code)]
#[allow(unused_variables)]
const _: fn() = || {
let f: $type = todo!();
require_send(&f);
require_sync(&f);
};
};
($type:ty: !Send & Sync) => {
#[allow(unreachable_code)]
#[allow(unused_variables)]
const _: fn() = || {
let f: $type = todo!();
AmbiguousIfSend::some_item(&f);
require_sync(&f);
};
};
($type:ty: Send & !Sync) => {
#[allow(unreachable_code)]
#[allow(unused_variables)]
const _: fn() = || {
let f: $type = todo!();
require_send(&f);
AmbiguousIfSync::some_item(&f);
};
};
($type:ty: !Send & !Sync) => {
#[allow(unreachable_code)]
#[allow(unused_variables)]
const _: fn() = || {
let f: $type = todo!();
AmbiguousIfSend::some_item(&f);
AmbiguousIfSync::some_item(&f);
};
};
}
macro_rules! async_assert_fn {
($($f:ident $(< $($generic:ty),* > )? )::+($($arg:ty),*): Send & Sync) => {
#[allow(unreachable_code)]
@@ -206,6 +244,7 @@ async_assert_fn!(tokio::task::LocalKey<Rc<u32>>::scope(_, Rc<u32>, BoxFutureSync
async_assert_fn!(tokio::task::LocalKey<Rc<u32>>::scope(_, Rc<u32>, BoxFutureSend<()>): !Send & !Sync);
async_assert_fn!(tokio::task::LocalKey<Rc<u32>>::scope(_, Rc<u32>, BoxFuture<()>): !Send & !Sync);
async_assert_fn!(tokio::task::LocalSet::run_until(_, BoxFutureSync<()>): !Send & !Sync);
assert_value!(tokio::task::LocalSet: !Send & !Sync);
async_assert_fn!(tokio::time::advance(Duration): Send & Sync);
async_assert_fn!(tokio::time::delay_for(Duration): Send & Sync);