diff options
Diffstat (limited to 'absl/base/internal/spinlock_linux.inc')
| -rw-r--r-- | absl/base/internal/spinlock_linux.inc | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/absl/base/internal/spinlock_linux.inc b/absl/base/internal/spinlock_linux.inc index 94c861dc6ca2..3bbd4954f1ed 100644 --- a/absl/base/internal/spinlock_linux.inc +++ b/absl/base/internal/spinlock_linux.inc @@ -51,17 +51,12 @@ extern "C" { ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockDelay( std::atomic<uint32_t> *w, uint32_t value, int loop, absl::base_internal::SchedulingMode) { - if (loop != 0) { - int save_errno = errno; - struct timespec tm; - tm.tv_sec = 0; - // Increase the delay; we expect (but do not rely on) explicit wakeups. - // We don't rely on explicit wakeups because we intentionally allow for - // a race on the kSpinLockSleeper bit. - tm.tv_nsec = 16 * absl::base_internal::SpinLockSuggestedDelayNS(loop); - syscall(SYS_futex, w, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, value, &tm); - errno = save_errno; - } + int save_errno = errno; + struct timespec tm; + tm.tv_sec = 0; + tm.tv_nsec = absl::base_internal::SpinLockSuggestedDelayNS(loop); + syscall(SYS_futex, w, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, value, &tm); + errno = save_errno; } ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockWake(std::atomic<uint32_t> *w, |