src/compiler-rt/test/sanitizer_common/TestCases/Linux/timerfd.cc

   1 // RUN: %clangxx -O0 -g %s -o %t && %run %t | FileCheck %s
   2 #include <assert.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <time.h>
   6 #include <sys/timerfd.h>
   7 #include <unistd.h>
   8
   9 int main (int argc, char** argv)
  10 {
  11   int fd = timerfd_create(CLOCK_REALTIME, 0);
  12   assert(fd >= 0);
  13
  14   struct itimerspec its;
  15   its.it_value.tv_sec = 0;
  16   its.it_value.tv_nsec = 1000000;
  17   its.it_interval.tv_sec = its.it_value.tv_sec;
  18   its.it_interval.tv_nsec = its.it_value.tv_nsec;
  19
  20   int res = timerfd_settime(fd, 0, &its, NULL);
  21   assert(res != -1);
  22
  23   struct itimerspec its2;
  24   res = timerfd_settime(fd, 0, &its, &its2);
  25   assert(res != -1);
  26   assert(its2.it_interval.tv_sec == its.it_interval.tv_sec);
  27   assert(its2.it_interval.tv_nsec == its.it_interval.tv_nsec);
  28   assert(its2.it_value.tv_sec <= its.it_value.tv_sec);
  29   assert(its2.it_value.tv_nsec <= its.it_value.tv_nsec);
  30
  31   struct itimerspec its3;
  32   res = timerfd_gettime(fd, &its3);
  33   assert(res != -1);
  34   assert(its3.it_interval.tv_sec == its.it_interval.tv_sec);
  35   assert(its3.it_interval.tv_nsec == its.it_interval.tv_nsec);
  36   assert(its3.it_value.tv_sec <= its.it_value.tv_sec);
  37   assert(its3.it_value.tv_nsec <= its.it_value.tv_nsec);
  38
  39
  40   unsigned long long buf;
  41   res = read(fd, &buf, sizeof(buf));
  42   assert(res == 8);
  43   assert(buf >= 1);
  44
  45   res = close(fd);
  46   assert(res != -1);
  47
  48   printf("DONE\n");
  49   // CHECK: DONE
  50
  51   return 0;
  52 }