1 /* Tests for POSIX timer implementation using process CPU clock. */
5 #if _POSIX_THREADS && defined _POSIX_CPUTIME
14 #define TEST_CLOCK CLOCK_PROCESS_CPUTIME_ID
15 #define TEST_CLOCK_MISSING(clock) \
16 (setup_test () ? "process CPU clock timer support" : NULL)
18 /* This function is intended to rack up both user and system time. */
24 static volatile char buf[4096];
25 for (int i = 0; i < 100; ++i)
26 for (size_t j = 0; j < sizeof buf; ++j)
28 int nullfd = open ("/dev/null", O_WRONLY);
29 for (int i = 0; i < 100; ++i)
30 for (size_t j = 0; j < sizeof buf; ++j)
32 write (nullfd, (char *) buf, sizeof buf);
42 /* Test timers on our own process CPU clock by having a worker thread
43 eating CPU. First make sure we can make such timers at all. */
46 if (timer_create (TEST_CLOCK, NULL, &t) != 0)
48 printf ("timer_create: %m\n");
54 int e = pthread_create (&th, NULL, chew_cpu, NULL);
57 printf ("pthread_create: %s\n", strerror (e));
65 # define TEST_CLOCK_MISSING(clock) "process clocks"
68 #include "tst-timer4.c"