This is another example of the wacky world of linux - where directly calling
kernel system calls from user-land processes (versus going through the any
ordained APIs) is considered completely OK. In this case, libevent has decided
to implement its own epoll_create() et al rather than using the libc-provided
epoll_create(), which gets it into trouble on non-linux implementations.
So, illumos has implemented the *expected* APIs for features like epoll and
others… however if some random piece of software tries to get too clever and
strays outside of using them, well then… the only thing I can suggest is to
yell at them instead :)
My suggestion? Avoid configuring with epoll. event ports is much better,
anyway. Since libevent’s autoconf script seems to not make this easy, you’ll
have to force the issue:
ac_cv_func_epoll_ctl=no ./configure …
/dale
> On Jul 27, 2016, at 10:22 AM, Alexander Pyhalov <a...@rsu.ru> wrote:
>
> Hi.
> Now we have epoll() in illumos-gate. This cool, I know. But has someone tried
> to build pkgsrc with epoll() enabled?
>
> Just one construction I've seen today in libevent (bundled with percona
> server):
>
> int
> epoll_create(int size)
> {
> #if !defined(__NR_epoll_create) && defined(__NR_epoll_create1)
> if (size <= 0) {
> errno = EINVAL;
> return -1;
> }
> return (syscall(__NR_epoll_create1, 0));
> #else
> return (syscall(__NR_epoll_create, size));
> #endif
> }
>
> int
> epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)
> {
>
> return (syscall(__NR_epoll_ctl, epfd, op, fd, event));
> }
>
> int
> epoll_wait(int epfd, struct epoll_event *events, int maxevents, int timeout)
> {
> #if !defined(__NR_epoll_wait) && defined(__NR_epoll_pwait)
> return (syscall(__NR_epoll_pwait, epfd, events, maxevents, timeout,
> NULL, 0));
> #else
> return (syscall(__NR_epoll_wait, epfd, events, maxevents, timeout));
> #endif
> }
>
> Of course, we don't have __NR_epoll_wait syscall. How many software breaks
> after introducing linux interface in illumos because of assumption have
> epoll() = > we are on linux? Has someone checked it?
>
> Has someone actually used software compiled with illumos-gate-provided
> epoll() interface in large scale?
>
> --
> Best regards,
> Alexander Pyhalov,
> system administrator of Southern Federal University IT department
>
-------------------------------------------
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