Yo Daniel! On Mon, 16 Sep 2019 23:05:55 -0400 Daniel Franke <dfoxfra...@gmail.com> wrote:
> On Mon, Sep 16, 2019, 22:50 Hal Murray via devel <devel@ntpsec.org>
> wrote:
>
> >
> > The disadvantage of SHM is that there is no way to wake up a reader
> > when new
> > data is available. Readers have to poll.
> >
>
> This is exactly what futexes are for.
From the Linux man page:
int futex(int *uaddr, int futex_op, int val,
const struct timespec *timeout, /* or: uint32_t val2 */
int *uaddr2, int val3);
Note: There is no glibc wrapper for this system call; see NOTES.
Is there a POSIX alternative?
RGDS
GARY
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