| commit | 1f5fe30cd651136f8f0fb54a17b9ac1e136f9214 | [log] [tgz] |
|---|---|---|
| author | Schrodinger ZHU Yifan <yifanzhu@rochester.edu> | Fri May 10 11:55:02 2024 -0400 |
| committer | Copybara-Service <copybara-worker@google.com> | Fri May 10 10:38:22 2024 -0700 |
| tree | e153a3d7d0539236e452a17245d7e8f2e9e067b8 | |
| parent | 98748087682a940ad4d5f9dba2bef85e610d6c7f [diff] |
[libc] avoid cmpxchg on the fastpath of callonce (#91748) Avoid `cmpxchg` operation if the function has already been called. The destination operand of `cmpxchg` may receive a write cycle without regard to the result of the comparison GitOrigin-RevId: b8f4f39d3d43d348e31fc5709b72e1f51392e52d