| 633 | while (!TryLock(lk)); |
| 634 | } |
| 635 | bool TryLock(TLFLockData *lk) |
| 636 | { |
| 637 | Y_ASSERT_NOBT(LockData == nullptr); |
| 638 | if (lk->TryLock()) { |
| 639 | LockData = lk; |
| 640 | return true; |
| 641 | } |
| 642 | if ((++Attempt & SleepMask) == 0) { |
| 643 | lk->FutexWait(); |
| 644 | SleepMask = (SleepMask * 2 + 1) & 0x7fff; |
| 645 | } else { |
| 646 | #ifdef _MSC_VER |
| 647 | _mm_pause(); |
| 648 | #elif defined(__i386) || defined(__x86_64__) |
| 649 | __asm__ __volatile__("pause"); |
| 650 | #endif |
| 651 | } |
| 652 | return false; |
| 653 | } |
| 654 | ~TLFLockHolder() { |
| 655 | if (LockData) { |
| 656 | LockData->Unlock(); |