[Bug libstdc++/100806] deadlock in std::counting_semaphore

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100806

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Thomas Rodgers <rodgertq@gcc.gnu.org>:

https://gcc.gnu.org/g:e02840c1a92abecd211ffaf05b28329bcb534583

commit r12-1732-ge02840c1a92abecd211ffaf05b28329bcb534583
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.