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author | Konstantin Belousov <kib@freebsd.org> | 2023-01-17 20:18:24 -0500 |
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committer | Ed Maste <emaste@FreeBSD.org> | 2023-01-20 16:39:38 -0500 |
commit | 83387dbc18e7998f87aa4a2d35320bcb2ed5c392 (patch) | |
tree | 868fb0d4c76a53cbb20208dddcbf442801f38b13 /libcxx/src | |
parent | c3efd52770ca964ba46287298c1d2f7697fd446c (diff) | |
download | llvm-83387dbc18e7998f87aa4a2d35320bcb2ed5c392.tar.gz |
[libc++] add FreeBSD atomic wait support
Reviewed By: philnik
Differential Revision: https://reviews.llvm.org/D142134
Diffstat (limited to 'libcxx/src')
-rw-r--r-- | libcxx/src/atomic.cpp | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/libcxx/src/atomic.cpp b/libcxx/src/atomic.cpp index ec7bb7d9b2c3..7777e888c000 100644 --- a/libcxx/src/atomic.cpp +++ b/libcxx/src/atomic.cpp @@ -26,6 +26,11 @@ # define SYS_futex SYS_futex_time64 #endif +#elif defined(__FreeBSD__) + +#include <sys/types.h> +#include <sys/umtx.h> + #else // <- Add other operating systems here // Baseline needs no new headers @@ -72,6 +77,22 @@ static void __libcpp_platform_wake_by_address(__cxx_atomic_contention_t const vo const_cast<__cxx_atomic_contention_t*>(__ptr), 0); } +#elif defined(__FreeBSD__) + +static void __libcpp_platform_wait_on_address(__cxx_atomic_contention_t const volatile* __ptr, + __cxx_contention_t __val) +{ + _umtx_op(const_cast<__cxx_atomic_contention_t*>(__ptr), + UMTX_OP_WAIT_UINT_PRIVATE, __val, NULL, NULL); +} + +static void __libcpp_platform_wake_by_address(__cxx_atomic_contention_t const volatile* __ptr, + bool __notify_one) +{ + _umtx_op(const_cast<__cxx_atomic_contention_t*>(__ptr), + UMTX_OP_WAKE_PRIVATE, __notify_one ? 1 : INT_MAX, NULL, NULL); +} + #else // <- Add other operating systems here // Baseline is just a timed backoff |