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| author | Thomas W Rodgers <rodgert@twrodgers.com> | 2023-02-10 10:09:06 -0800 |
|---|---|---|
| committer | Thomas W Rodgers <rodgert@twrodgers.com> | 2023-02-13 17:46:59 -0800 |
| commit | 56cf9372c0596c4df4003c72dc4665a306fbfe31 (patch) | |
| tree | a7bcfff63c4650a95be26cb0d0cf461bc5cd7a06 | |
| parent | a8d769045b43e8509490362865a85cb31a855ccf (diff) | |
| download | gcc-56cf9372c0596c4df4003c72dc4665a306fbfe31.zip gcc-56cf9372c0596c4df4003c72dc4665a306fbfe31.tar.gz gcc-56cf9372c0596c4df4003c72dc4665a306fbfe31.tar.bz2 | |
libstdc++: Add missing free functions for atomic_flag [PR103934]
This patch adds -
atomic_flag_wait
atomic_flag_wait_explicit
atomic_flag_notify
atomic_flag_notify_explicit
Which were missed when commit 83a1be introduced C++20 atomic wait.
libstdc++-v3/ChangeLog:
PR libstdc++/103934
* include/std/atomic (atomic_flag_wait): Add.
(atomic_flag_wait_explicit): Add.
(atomic_flag_notify): Add.
(atomic_flag_notify_explicit): Add.
* testsuite/29_atomics/atomic_flag/wait_notify/1.cc:
Add test case to cover missing atomic_flag free functions.
| -rw-r--r-- | libstdc++-v3/include/std/atomic | 19 | ||||
| -rw-r--r-- | libstdc++-v3/testsuite/29_atomics/atomic_flag/wait_notify/1.cc | 26 |
2 files changed, 43 insertions, 2 deletions
diff --git a/libstdc++-v3/include/std/atomic b/libstdc++-v3/include/std/atomic index 1edd3ae..96e87de 100644 --- a/libstdc++-v3/include/std/atomic +++ b/libstdc++-v3/include/std/atomic @@ -1259,6 +1259,25 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION atomic_flag_clear(volatile atomic_flag* __a) noexcept { atomic_flag_clear_explicit(__a, memory_order_seq_cst); } +#if __cpp_lib_atomic_wait + inline void + atomic_flag_wait(atomic_flag* __a, bool __old) noexcept + { __a->wait(__old); } + + inline void + atomic_flag_wait_explicit(atomic_flag* __a, bool __old, + memory_order __m) noexcept + { __a->wait(__old, __m); } + + inline void + atomic_flag_notify_one(atomic_flag* __a) noexcept + { __a->notify_one(); } + + inline void + atomic_flag_notify_all(atomic_flag* __a) noexcept + { __a->notify_all(); } +#endif // __cpp_lib_atomic_wait + /// @cond undocumented // _GLIBCXX_RESOLVE_LIB_DEFECTS // 3220. P0558 broke conforming C++14 uses of atomic shared_ptr diff --git a/libstdc++-v3/testsuite/29_atomics/atomic_flag/wait_notify/1.cc b/libstdc++-v3/testsuite/29_atomics/atomic_flag/wait_notify/1.cc index 240fb42..777fa91 100644 --- a/libstdc++-v3/testsuite/29_atomics/atomic_flag/wait_notify/1.cc +++ b/libstdc++-v3/testsuite/29_atomics/atomic_flag/wait_notify/1.cc @@ -26,8 +26,8 @@ #include <testsuite_hooks.h> -int -main() +void +test01() { std::atomic_flag a; VERIFY( !a.test() ); @@ -39,5 +39,27 @@ main() }); a.wait(false); t.join(); +} + +void +test02() +{ + std::atomic_flag a; + VERIFY( !std::atomic_flag_test(&a) ); + std::atomic_flag_wait(&a, true); + std::thread t([&] + { + std::atomic_flag_test_and_set(&a); + std::atomic_flag_notify_one(&a); + }); + std::atomic_flag_wait(&a, false); + t.join(); +} + +int +main() +{ + test01(); + test02(); return 0; } |