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from 8bd3b0c11cb rs6000: Fix cpu selection w/ isel (PR100108) new 246abba01f3 libstdc++: Refactor/cleanup of C++20 atomic wait implementation new 27350b77a92 libstdc++: Disable tests that fail after atomic wait/notify [...]

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Summary of changes: libstdc++-v3/include/Makefile.am | 1 + libstdc++-v3/include/Makefile.in | 1 + libstdc++-v3/include/bits/atomic_base.h | 39 +- libstdc++-v3/include/bits/atomic_timed_wait.h | 465 ++++++++++++++------- libstdc++-v3/include/bits/atomic_wait.h | 457 +++++++++++++------- libstdc++-v3/include/bits/semaphore_base.h | 191 ++++----- libstdc++-v3/include/bits/this_thread_sleep.h | 119 ++++++ libstdc++-v3/include/std/atomic | 15 +- libstdc++-v3/include/std/barrier | 13 +- libstdc++-v3/include/std/latch | 8 +- libstdc++-v3/include/std/semaphore | 9 +- libstdc++-v3/include/std/thread | 68 +-- .../29_atomics/atomic/wait_notify/bool.cc | 37 +- .../29_atomics/atomic/wait_notify/generic.cc | 19 +- .../29_atomics/atomic/wait_notify/pointers.cc | 36 +- .../29_atomics/atomic_flag/wait_notify/1.cc | 37 +- .../29_atomics/atomic_float/wait_notify.cc | 26 +- .../29_atomics/atomic_integral/wait_notify.cc | 73 ++-- .../testsuite/29_atomics/atomic_ref/wait_notify.cc | 74 +--- .../30_threads/semaphore/try_acquire_for.cc | 2 + .../30_threads/semaphore/try_acquire_until.cc | 2 + .../30_threads/stop_token/stop_callback/destroy.cc | 2 + 22 files changed, 984 insertions(+), 710 deletions(-) create mode 100644 libstdc++-v3/include/bits/this_thread_sleep.h