diff options
Diffstat (limited to 'absl/synchronization/internal/waiter.cc')
| -rw-r--r-- | absl/synchronization/internal/waiter.cc | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/absl/synchronization/internal/waiter.cc b/absl/synchronization/internal/waiter.cc index 8e713770..f1425872 100644 --- a/absl/synchronization/internal/waiter.cc +++ b/absl/synchronization/internal/waiter.cc @@ -342,8 +342,11 @@ bool Waiter::Wait(KernelTimeout t) { } void Waiter::Post() { - wakeups_.fetch_add(1, std::memory_order_release); // Post a wakeup. - Poke(); + // Post a wakeup. + if (wakeups_.fetch_add(1, std::memory_order_release) == 0) { + // We incremented from 0, need to wake a potential waiter. + Poke(); + } } void Waiter::Poke() { |