diff options
Diffstat (limited to 'sysdeps/nptl/futex-internal.h')
| -rw-r--r-- | sysdeps/nptl/futex-internal.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/sysdeps/nptl/futex-internal.h b/sysdeps/nptl/futex-internal.h index d622122ddc..159aae82dc 100644 --- a/sysdeps/nptl/futex-internal.h +++ b/sysdeps/nptl/futex-internal.h @@ -467,4 +467,56 @@ futex_unlock_pi (unsigned int *futex_word, int private) } } +#ifndef __NR_futex_time64 +# define __NR_futex_time64 __NR_futex +#endif + +static __always_inline int +futex_timed_wait_cancel64 (pid_t *tidp, pid_t tid, + const struct __timespec64 *timeout, int private) +{ + int err = INTERNAL_SYSCALL_CANCEL (futex_time64, tidp, + __lll_private_flag + (FUTEX_WAIT, private), tid, timeout); +#ifndef __ASSUME_TIME64_SYSCALLS + if (err == -ENOSYS) + { + if (in_time_t_range (timeout->tv_sec)) + { + struct timespec ts32 = valid_timespec64_to_timespec (*timeout); + + err = INTERNAL_SYSCALL_CANCEL (futex, tidp, + __lll_private_flag (FUTEX_WAIT, + private), + tid, &ts32); + } + else + err = -EOVERFLOW; + } +#endif + switch (err) + { + case 0: + case -EAGAIN: + case -EINTR: + case -ETIMEDOUT: + case -EDEADLK: + case -ENOSYS: + case -EOVERFLOW: /* Passed absolute timeout uses 64 bit time_t type, but + underlying kernel does not support 64 bit time_t futex + syscalls. */ + case -EPERM: /* The caller is not allowed to attach itself to the futex. + Used to check if PI futexes are supported by the + kernel. */ + return -err; + + case -EINVAL: /* Either due to wrong alignment or due to the timeout not + being normalized. Must have been caused by a glibc or + application bug. */ + case -EFAULT: /* Must have been caused by a glibc or application bug. */ + /* No other errors are documented at this time. */ + default: + futex_fatal_error (); + } +} #endif /* futex-internal.h */ |