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CheckWorkingKqueue.cmake revision 1.1 
      1 include(CheckCSourceRuns)
      2 
      3 check_c_source_runs(
      4 "
      5 #include <sys/types.h>
      6 #include <sys/time.h>
      7 #include <sys/event.h>
      8 #include <stdio.h>
      9 #include <unistd.h>
     10 #include <fcntl.h>
     11 
     12 int
     13 main(int argc, char **argv)
     14 {
     15     int kq;
     16     int n;
     17     int fd[2];
     18     struct kevent ev;
     19     struct timespec ts;
     20     char buf[80000];
     21 
     22     if (pipe(fd) == -1)
     23         exit(1);
     24     if (fcntl(fd[1], F_SETFL, O_NONBLOCK) == -1)
     25         exit(1);
     26 
     27     while ((n = write(fd[1], buf, sizeof(buf))) == sizeof(buf))
     28         ;
     29 
     30     if ((kq = kqueue()) == -1)
     31         exit(1);
     32 
     33     memset(&ev, 0, sizeof(ev));
     34     ev.ident = fd[1];
     35     ev.filter = EVFILT_WRITE;
     36     ev.flags = EV_ADD | EV_ENABLE;
     37     n = kevent(kq, &ev, 1, NULL, 0, NULL);
     38     if (n == -1)
     39         exit(1);
     40 
     41     read(fd[0], buf, sizeof(buf));
     42 
     43     ts.tv_sec = 0;
     44     ts.tv_nsec = 0;
     45     n = kevent(kq, NULL, 0, &ev, 1, &ts);
     46     if (n == -1 || n == 0)
     47         exit(1);
     48 
     49     exit(0);
     50 }
     51 
     52 " EVENT__HAVE_WORKING_KQUEUE)
     53