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Subject: [Bug libstdc++/100806] deadlock in std::counting_semaphore
Date: Tue, 22 Jun 2021 18:08:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100806

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Thomas Rodgers
<rodgertq@gcc.gnu.org>:

https://gcc.gnu.org/g:c24384efbbaeeca3dbc53e7d1226a57bc16e9ad5

commit r11-8638-gc24384efbbaeeca3dbc53e7d1226a57bc16e9ad5
Author: Thomas Rodgers <rodgert@appliantology.com>
Date:   Tue Jun 22 10:59:07 2021 -0700

    libstdc++: Fix for deadlock in std::counting_semaphore [PR100806]

    libstdc++-v3/ChangeLog:
            PR libstdc++/100806
            * include/bits/semaphore_base.h (__atomic_semaphore::_M_release=
):
            Force _M_release() to wake all waiting threads.
            * testsuite/30_threads/semaphore/100806.cc: New test.

    (cherry picked from commit e02840c1a92abecd211ffaf05b28329bcb534583)=