[libcxx-commits] [libcxx] [libc++] Add an implementation of shared_mutex based on pthread_rwlock_t (PR #148046)

[Louis Dionne via libcxx-commits]

ldionne wrote:

Moving the destructor to the dylib is something we could do if we wanted, https://github.com/llvm/llvm-project/pull/148047 implements that change.

https://github.com/llvm/llvm-project/pull/148046