[libcxx-commits] [libcxx] [libc++] Fix `std::atomic::wait` ulock wait UL_COMPARE_AND_WAIT64 (PR #92783)

[via libcxx-commits]

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@@ -69,17 +69,17 @@ extern "C" int __ulock_wait(
     uint32_t operation, void* addr, uint64_t value, uint32_t timeout); /* timeout is specified in microseconds */
 extern "C" int __ulock_wake(uint32_t operation, void* addr, uint64_t wake_value);
 
-#  define UL_COMPARE_AND_WAIT 1
+#  define UL_COMPARE_AND_WAIT64 5
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huixie90 wrote:

yeah it is a bit fiddly. we (with Louis) couldn't even find the header in the SDK. it is some sort of "internal" API
https://github.com/apple/darwin-xnu/blob/2ff845c2e033bd0ff64b5b6aa6063a1f8f65aa32/bsd/sys/ulock.h#L82

https://github.com/llvm/llvm-project/pull/92783