diff options
Diffstat (limited to 'sysdeps/nptl/futex-internal.h')
| -rw-r--r-- | sysdeps/nptl/futex-internal.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/sysdeps/nptl/futex-internal.h b/sysdeps/nptl/futex-internal.h index d5f13d15fb..8c1d592308 100644 --- a/sysdeps/nptl/futex-internal.h +++ b/sysdeps/nptl/futex-internal.h @@ -390,9 +390,17 @@ futex_unlock_pi (unsigned int *futex_word, int private) } } -/* The futex_abstimed_wait_cancelable64 has been moved to a separate file - to avoid problems with exhausting available registers on some architectures - - e.g. on m68k architecture. */ +/* Like futex_wait, but will eventually time out (i.e., stop being blocked) + after the duration of time provided (i.e., ABSTIME) has passed using the + clock specified by CLOCKID (currently only CLOCK_REALTIME and + CLOCK_MONOTONIC, the ones support by lll_futex_supported_clockid). ABSTIME + can also equal NULL, in which case this function behaves equivalent to + futex_wait. + + Returns the same values as futex_wait under those same conditions; + additionally, returns ETIMEDOUT if the timeout expired. + + The call acts as a cancellation entrypoint. */ int __futex_abstimed_wait_cancelable64 (unsigned int* futex_word, unsigned int expected, clockid_t clockid, |