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-rw-r--r--absl/synchronization/mutex.h9
1 files changed, 4 insertions, 5 deletions
diff --git a/absl/synchronization/mutex.h b/absl/synchronization/mutex.h
index 8c70c4ce..961ff52b 100644
--- a/absl/synchronization/mutex.h
+++ b/absl/synchronization/mutex.h
@@ -331,17 +331,16 @@ class ABSL_LOCKABLE Mutex {
// Mutex::AwaitWithTimeout()
// Mutex::AwaitWithDeadline()
//
- // If `cond` is initially true, do nothing, or act as though `cond` is
- // initially false.
- //
- // If `cond` is initially false, unlock this `Mutex` and block until
- // simultaneously:
+ // Unlocks this `Mutex` and blocks until simultaneously:
// - either `cond` is true or the {timeout has expired, deadline has passed}
// and
// - this `Mutex` can be reacquired,
// then reacquire this `Mutex` in the same mode in which it was previously
// held, returning `true` iff `cond` is `true` on return.
//
+ // If the condition is initially `true`, the implementation *may* skip the
+ // release/re-acquire step and return immediately.
+ //
// Deadlines in the past are equivalent to an immediate deadline.
// Negative timeouts are equivalent to a zero timeout.
//