| author |  Andrew Kelley <andrew@ziglang.org> 2026-02-01 18:44:08-08:00 |
| committer | Andrew Kelley <andrew@ziglang.org> 2026-02-02 00:09:48-08:00 |
| log | 60ac4e78ebb6de925b7bd1dc8571af55d096f964 |
| tree | 5985d84523871d9be9151f8a8589abfd70a11154 |
| parent | aacf8ce03d2b52e52830873c40eabb1cb1eb8272 |
std.Io.Mutex: fix tryLock
`@cmpxchgWeak` can return the expected value sometimes.1 files changed, 1 insertions(+), 9 deletions(-)
lib- std
lib/std/Io.zig+1-9
| ... | ... | @@ -1236,15 +1236,7 @@ pub const Mutex = extern struct { |
| 1236 | 1236 | }; |
| 1237 | 1237 | |
| 1238 | 1238 | pub fn tryLock(m: *Mutex) bool { |
| 1239 | switch (m.state.cmpxchgWeak( | |
| 1240 | .unlocked, | |
| 1241 | .locked_once, | |
| 1242 | .acquire, | |
| 1243 | .monotonic, | |
| 1244 | ) orelse return true) { | |
| 1245 | .unlocked => unreachable, | |
| 1246 | .locked_once, .contended => return false, | |
| 1247 | } | |
| 1239 | return m.state.cmpxchgWeak(.unlocked, .locked_once, .acquire, .monotonic) == null; | |
| 1248 | 1240 | } |
| 1249 | 1241 | |
| 1250 | 1242 | pub fn lock(m: *Mutex, io: Io) Cancelable!void { |