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| | /*
* fake epoll_pwait() implemented using ppoll + epoll_wait.
* This is only for Linux 2.6.18 / glibc 2.5 systems (Enterprise distros :P)
*
* Copyright (C) 2012-2020 all contributors <cmogstored-public@yhbt.net>
* License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
*/
#if !defined(HAVE_EPOLL_PWAIT) \
&& defined(HAVE_PPOLL) && defined(HAVE_EPOLL_WAIT)
static int my_epoll_pwait(int epfd, struct epoll_event *events,
int maxevents, int timeout, const sigset_t *sigmask)
{
struct pollfd pfds = { .fd = epfd, .events = POLLIN };
int rc;
struct timespec ts;
struct timespec *tsp;
if (timeout < 0) {
tsp = NULL;
} else {
ts.tv_sec = timeout / 1000;
ts.tv_nsec = (timeout % 1000) * 1000000;
tsp = &ts;
}
/* wait on just the epoll descriptor itself */
rc = ppoll(&pfds, 1, tsp, sigmask);
if (rc < 0)
assert((errno == EINTR || errno == ENOMEM)
&& "ppoll usage bug");
/* no sleep for the actual epoll call */
return rc > 0 ? epoll_wait(epfd, events, maxevents, 0) : 0;
}
#define epoll_pwait(epfd,events,maxevents,timeout,sigmask) \
my_epoll_pwait((epfd),(events),(maxevents),(timeout),(sigmask))
#endif /* epoll_pwait */
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