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| author | Thomas Gleixner <tglx@linutronix.de> | 2008-08-31 08:16:57 -0700 |
|---|---|---|
| committer | Arjan van de Ven <arjan@linux.intel.com> | 2008-09-05 21:34:59 -0700 |
| commit | b773ad40aca5bd755ba886620842f16e8fef6d75 (patch) | |
| tree | 7065661f6559aff70244f2805ced48f894c9b38c /include | |
| parent | df0cc0539b4127bd02f64de2c335b4af1fdb3845 (diff) | |
| download | linux-b773ad40aca5bd755ba886620842f16e8fef6d75.tar.gz linux-b773ad40aca5bd755ba886620842f16e8fef6d75.tar.xz | |
select: add poll_select_set_timeout() and poll_select_copy_remaining() helpers
This patch adds 2 helpers that will be used for the hrtimer based select/poll:
poll_select_set_timeout() is a helper that takes a timeout (as a second, nanosecond
pair) and turns that into a "struct timespec" that represents the absolute end time.
This is a common operation in the many select() and poll() variants and needs various,
common, sanity checks.
poll_select_copy_remaining() is a helper that takes care of copying the remaining
time to userspace, as select(), pselect() and ppoll() do. This function comes in
both a natural and a compat implementation (due to datastructure differences).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/poll.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/poll.h b/include/linux/poll.h index ef453828877a..f65de5128a9e 100644 --- a/include/linux/poll.h +++ b/include/linux/poll.h @@ -120,6 +120,8 @@ extern int do_sys_poll(struct pollfd __user * ufds, unsigned int nfds, extern int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, s64 *timeout); +extern int poll_select_set_timeout(struct timespec *to, long sec, long nsec); + #endif /* KERNEL */ #endif /* _LINUX_POLL_H */ |