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

Merged
merged 14 commits into from
Apr 5, 2022
Merged

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

merged 14 commits into from
Apr 5, 2022

Commits on Mar 23, 2022

  1. Return timeout status in futex_wait.

    @m-ou-se
    m-ou-se committed Mar 23, 2022
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  2. Add futex_wake_all.

    @m-ou-se
    m-ou-se committed Mar 23, 2022
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  3. Replace Linux Mutex and Condvar with futex based ones.

    @m-ou-se
    m-ou-se committed Mar 23, 2022
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  4. Update tests.

    @m-ou-se
    m-ou-se committed Mar 23, 2022
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  5. Spin before blocking in Mutex::lock.

    @m-ou-se
    m-ou-se committed Mar 23, 2022
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Commits on Mar 24, 2022

  1. Use FUTEX_WAIT_BITSET rather than FUTEX_WAIT on Linux.

    @m-ou-se
    m-ou-se committed Mar 24, 2022
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  2. Make Timespec available in sys::unix.

    @m-ou-se
    m-ou-se committed Mar 24, 2022
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  3. Explicitly use CLOCK_MONOTONIC in futex_wait. 

    Instant might be changed to use CLOCK_BOOTTIME at some point.
    @m-ou-se
    m-ou-se committed Mar 24, 2022
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Commits on Apr 1, 2022

  1. Add comment about futex_wait timeout.

    @m-ou-se
    m-ou-se committed Apr 1, 2022
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  2. Shuffle around #[inline] and #[cold] in mutex impl.

    @m-ou-se
    m-ou-se committed Apr 1, 2022
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  3. Don't spin on contended mutexes.

    @m-ou-se
    m-ou-se committed Apr 1, 2022
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  4. Use MaybeUninit for clock_gettime's timespec.

    @m-ou-se
    m-ou-se committed Apr 1, 2022
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Commits on Apr 5, 2022

  1. Mark unix::locks::futex::Mutex::new as #[inline].

    @m-ou-se
    m-ou-se committed Apr 5, 2022
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  2. Reword comment in futex condvar implementation.

    @m-ou-se
    m-ou-se committed Apr 5, 2022
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