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Replace Linux Mutex and Condvar with futex based ones. #95035

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Merged
bors merged 14 commits into from
Apr 5, 2022
+251 −41
Merged

Replace Linux Mutex and Condvar with futex based ones. #95035

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4fbd71c
Return timeout status in futex_wait.
m-ou-se Mar 17, 2022
73d6348
Add futex_wake_all.
m-ou-se Mar 17, 2022
7f26ade
Replace Linux Mutex and Condvar with futex based ones.
m-ou-se Mar 17, 2022
10b6f33
Update tests.
m-ou-se Mar 17, 2022
da4ef04
Spin before blocking in Mutex::lock.
m-ou-se Mar 21, 2022
8729929
Use FUTEX_WAIT_BITSET rather than FUTEX_WAIT on Linux.
m-ou-se Mar 24, 2022
23badeb
Make Timespec available in sys::unix.
m-ou-se Mar 24, 2022
c9ae3fe
Explicitly use CLOCK_MONOTONIC in futex_wait.
m-ou-se Mar 24, 2022
c49887d
Add comment about futex_wait timeout.
m-ou-se Apr 1, 2022
6392f15
Shuffle around #[inline] and #[cold] in mutex impl.
m-ou-se Apr 1, 2022
321690c
Don't spin on contended mutexes.
m-ou-se Apr 1, 2022
4b1b305
Use MaybeUninit for clock_gettime's timespec.
m-ou-se Apr 1, 2022
104e95f
Mark unix::locks::futex::Mutex::new as #[inline].
m-ou-se Apr 5, 2022
650315e
Reword comment in futex condvar implementation.
m-ou-se Apr 5, 2022
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Mark unix::locks::futex::Mutex::new as #[inline].
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@m-ou-se
m-ou-se committed Apr 5, 2022
commit 104e95f8481b8edf17e399bddf5b210d40a7775a
1 change: 1 addition & 0 deletions library/std/src/sys/unix/locks/futex.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ pub struct Mutex {
}

impl Mutex {
#[inline]
pub const fn new() -> Self {
Self { futex: AtomicI32::new(0) }
}
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