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| author | Derek Mauro <dmauro@google.com> | 2023-04-12 13:26:48 -0700 |
|---|---|---|
| committer | Copybara-Service <copybara-worker@google.com> | 2023-04-12 13:27:28 -0700 |
| commit | c23acb9b5636e7b908fba03d6b3584d8f80dba6d (patch) | |
| tree | cc2332512cecd0d3efb2f3819516fb6d7af44bc6 /absl/synchronization/internal/futex_waiter.h | |
| parent | 32d314d0f5bb0ca3ff71ece49c71a728c128d43e (diff) | |
| download | abseil-c23acb9b5636e7b908fba03d6b3584d8f80dba6d.tar.gz abseil-c23acb9b5636e7b908fba03d6b3584d8f80dba6d.tar.bz2 abseil-c23acb9b5636e7b908fba03d6b3584d8f80dba6d.zip | |
Synchronization: Consolidate the logic for whether steady clocks are supported
for relative timeouts
PiperOrigin-RevId: 523789416
Change-Id: Ide4cfdcae9ea7bffca3355c80ea9c8833a9536e6
Diffstat (limited to 'absl/synchronization/internal/futex_waiter.h')
| -rw-r--r-- | absl/synchronization/internal/futex_waiter.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/absl/synchronization/internal/futex_waiter.h b/absl/synchronization/internal/futex_waiter.h index a6a72095..11dfa93b 100644 --- a/absl/synchronization/internal/futex_waiter.h +++ b/absl/synchronization/internal/futex_waiter.h @@ -43,6 +43,11 @@ class FutexWaiter : public WaiterCrtp<FutexWaiter> { static constexpr char kName[] = "FutexWaiter"; private: + // Atomically check that `*v == val`, and if it is, then sleep until the + // timeout `t` has been reached, or until woken by `Wake()`. + static int WaitUntil(std::atomic<int32_t>* v, int32_t val, + KernelTimeout t); + // Futexes are defined by specification to be 32-bits. // Thus std::atomic<int32_t> must be just an int32_t with lockfree methods. std::atomic<int32_t> futex_; |