openpbs/m4/pbs_decl_epoll_pwait.m4

#
# Copyright (C) 1994-2018 Altair Engineering, Inc.
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#
# Prefix the macro names with PBS_ so they don't conflict with
# Python definitions
#

AC_DEFUN([PBS_AC_DECL_EPOLL_PWAIT],
[
  AS_CASE([x$target_os],
    [xlinux*],
      AC_MSG_CHECKING(whether epoll_pwait system call is supported)
      AC_TRY_RUN([
#include <unistd.h>
#include <poll.h>
#include <signal.h>
#include <stdio.h>
#include <errno.h>
#include <sys/epoll.h>
int main()
{
  sigset_t allsigs;
  int n;
  int maxevents = 1;
  int timeout = 0;
  int epollfd;
  struct   epoll_event  events;
  sigemptyset(&allsigs);
  events.events = EPOLLIN;
  epollfd = epoll_create1(0);
  if (epollfd == -1) {
    perror("epoll_create1");
    return (1);
  }
  n = epoll_pwait(epollfd, &events, maxevents, timeout, &allsigs);
  return (n);
}],
        AC_DEFINE([PBS_HAVE_EPOLL_PWAIT], [],
                  [Defined when epoll_pwait is available])
        AC_MSG_RESULT([yes]),
        AC_MSG_RESULT([no])
      )
  )
])