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The __cond_wait_until_impl function takes a steady_clock timeout, but
then sometimes tries to compare it to a time from the system_clock,
which won't compile. Additionally, that function gets called with
system_clock timeouts, which also won't compile. This makes the function
accept timeouts for either clock, and compare to the time from the right
clock.
This fixes the compilation error that was causing two tests to fail on
non-futex targets, so we can revert the r12-11 change to disable them.
libstdc++-v3/ChangeLog:
* include/bits/atomic_timed_wait.h (__cond_wait_until_impl):
Handle system_clock as well as steady_clock.
* testsuite/30_threads/semaphore/try_acquire_for.cc: Re-enable.
* testsuite/30_threads/semaphore/try_acquire_until.cc:
Re-enable.
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These tests are currently failing, but should be analyzed and
re-enabled.
libstdc++-v3/ChangeLog:
* testsuite/30_threads/semaphore/try_acquire_for.cc: Disable
test for targets not using futexes for semaphores.
* testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
* testsuite/30_threads/stop_token/stop_callback/destroy.cc:
Disable for all targets.
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libstdc++-v3/ChangeLog:
* testsuite/29_atomics/atomic/wait_notify/bool.cc: Add options to
link with libatomic.
* testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
* testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
* testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
* testsuite/30_threads/barrier/arrive.cc: Likewise.
* testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
* testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
* testsuite/30_threads/barrier/completion.cc: Likewise.
* testsuite/30_threads/latch/3.cc: Likewise.
* testsuite/30_threads/semaphore/try_acquire.cc: Likewise.
* testsuite/30_threads/semaphore/try_acquire_for.cc: Likewise.
* testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
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The __platform_wait function is supposed to wait until *addr != old.
The futex syscall checks the initial value and returns EAGAIN if *addr
!= old is already true, which should cause __platform_wait to return.
Instead it loops and keeps doing a futex wait, which keeps returning
EAGAIN.
libstdc++-v3/ChangeLog:
PR libstdc++/97936
* include/bits/atomic_wait.h (__platform_wait): Return if futex
sets EAGAIN.
* testsuite/30_threads/latch/3.cc: Re-enable test.
* testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
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These tests are unstable and causing failures due to timeouts. Disable
them until the cause can be found, so that testing doesn't have to wait
for them to timeout.
libstdc++-v3/ChangeLog:
PR libstdc++/97936
PR libstdc++/97944
* testsuite/29_atomics/atomic_integral/wait_notify.cc: Disable.
Do not require pthreads, but add -pthread when appropriate.
* testsuite/30_threads/jthread/95989.cc: Likewise.
* testsuite/30_threads/latch/3.cc: Likewise.
* testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
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Add support for -
* atomic_flag::wait/notify_one/notify_all
* atomic::wait/notify_one/notify_all
* counting_semaphore
* binary_semaphore
* latch
libstdc++-v3/ChangeLog:
* include/Makefile.am (bits_headers): Add new header.
* include/Makefile.in: Regenerate.
* include/bits/atomic_base.h (__atomic_flag::wait): Define.
(__atomic_flag::notify_one): Likewise.
(__atomic_flag::notify_all): Likewise.
(__atomic_base<_Itp>::wait): Likewise.
(__atomic_base<_Itp>::notify_one): Likewise.
(__atomic_base<_Itp>::notify_all): Likewise.
(__atomic_base<_Ptp*>::wait): Likewise.
(__atomic_base<_Ptp*>::notify_one): Likewise.
(__atomic_base<_Ptp*>::notify_all): Likewise.
(__atomic_impl::wait): Likewise.
(__atomic_impl::notify_one): Likewise.
(__atomic_impl::notify_all): Likewise.
(__atomic_float<_Fp>::wait): Likewise.
(__atomic_float<_Fp>::notify_one): Likewise.
(__atomic_float<_Fp>::notify_all): Likewise.
(__atomic_ref<_Tp>::wait): Likewise.
(__atomic_ref<_Tp>::notify_one): Likewise.
(__atomic_ref<_Tp>::notify_all): Likewise.
(atomic_wait<_Tp>): Likewise.
(atomic_wait_explicit<_Tp>): Likewise.
(atomic_notify_one<_Tp>): Likewise.
(atomic_notify_all<_Tp>): Likewise.
* include/bits/atomic_wait.h: New file.
* include/bits/atomic_timed_wait.h: New file.
* include/bits/semaphore_base.h: New file.
* include/std/atomic (atomic<bool>::wait): Define.
(atomic<bool>::wait_one): Likewise.
(atomic<bool>::wait_all): Likewise.
(atomic<_Tp>::wait): Likewise.
(atomic<_Tp>::wait_one): Likewise.
(atomic<_Tp>::wait_all): Likewise.
(atomic<_Tp*>::wait): Likewise.
(atomic<_Tp*>::wait_one): Likewise.
(atomic<_Tp*>::wait_all): Likewise.
* include/std/latch: New file.
* include/std/semaphore: New file.
* include/std/version: Add __cpp_lib_semaphore and
__cpp_lib_latch defines.
* testsuite/29_atomics/atomic/wait_notify/bool.cc: New test.
* testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
* testsuite/29_atomics/atomic/wait_notify/generic.cc: Liekwise.
* testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
* testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
* testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
* testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
* testsuite/30_threads/semaphore/1.cc: New test.
* testsuite/30_threads/semaphore/2.cc: Likewise.
* testsuite/30_threads/semaphore/least_max_value_neg.cc: Likewise.
* testsuite/30_threads/semaphore/try_acquire.cc: Likewise.
* testsuite/30_threads/semaphore/try_acquire_for.cc: Likewise.
* testsuite/30_threads/semaphore/try_acquire_posix.cc: Likewise.
* testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
* testsuite/30_threads/latch/1.cc: New test.
* testsuite/30_threads/latch/2.cc: New test.
* testsuite/30_threads/latch/3.cc: New test.
* testsuite/util/atomic/wait_notify_util.h: New File.
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