aboutsummaryrefslogtreecommitdiff
path: root/rt/tst-cputimer3.c
diff options
context:
space:
mode:
Diffstat (limited to 'rt/tst-cputimer3.c')
-rw-r--r--rt/tst-cputimer3.c130
1 files changed, 0 insertions, 130 deletions
diff --git a/rt/tst-cputimer3.c b/rt/tst-cputimer3.c
deleted file mode 100644
index 056766a377..0000000000
--- a/rt/tst-cputimer3.c
+++ /dev/null
@@ -1,130 +0,0 @@
-/* Tests for POSIX timer implementation using another process's CPU clock. */
-
-#include <unistd.h>
-
-#if _POSIX_THREADS && defined _POSIX_CPUTIME
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fcntl.h>
-#include <time.h>
-#include <signal.h>
-#include <sys/wait.h>
-
-static clockid_t child_clock;
-
-#define TEST_CLOCK child_clock
-#define TEST_CLOCK_MISSING(clock) \
- (setup_test () ? "other-process CPU clock timer support" : NULL)
-
-/* This function is intended to rack up both user and system time. */
-static void
-chew_cpu (void)
-{
- while (1)
- {
- static volatile char buf[4096];
- for (int i = 0; i < 100; ++i)
- for (size_t j = 0; j < sizeof buf; ++j)
- buf[j] = 0xaa;
- int nullfd = open ("/dev/null", O_WRONLY);
- for (int i = 0; i < 100; ++i)
- for (size_t j = 0; j < sizeof buf; ++j)
- buf[j] = 0xbb;
- write (nullfd, (char *) buf, sizeof buf);
- close (nullfd);
- if (getppid () == 1)
- _exit (2);
- }
-}
-
-static pid_t child;
-static void
-cleanup_child (void)
-{
- if (child <= 0)
- return;
- if (kill (child, SIGKILL) < 0 && errno != ESRCH)
- printf ("cannot kill child %d: %m\n", child);
- else
- {
- int status;
- errno = 0;
- if (waitpid (child, &status, 0) != child)
- printf ("waitpid %d: %m\n", child);
- }
-}
-#define CLEANUP_HANDLER cleanup_child ()
-
-static int
-setup_test (void)
-{
- /* Test timers on a process CPU clock by having a child process eating
- CPU. First make sure we can make such timers at all. */
-
- int pipefd[2];
- if (pipe (pipefd) < 0)
- {
- printf ("pipe: %m\n");
- exit (1);
- }
-
- child = fork ();
-
- if (child == 0)
- {
- char c;
- close (pipefd[1]);
- if (read (pipefd[0], &c, 1) == 1)
- chew_cpu ();
- _exit (1);
- }
-
- if (child < 0)
- {
- printf ("fork: %m\n");
- exit (1);
- }
-
- atexit (&cleanup_child);
-
- close (pipefd[0]);
-
- int e = clock_getcpuclockid (child, &child_clock);
- if (e == EPERM)
- {
- puts ("clock_getcpuclockid does not support other processes");
- return 1;
- }
- if (e != 0)
- {
- printf ("clock_getcpuclockid: %s\n", strerror (e));
- exit (1);
- }
-
- timer_t t;
- if (timer_create (TEST_CLOCK, NULL, &t) != 0)
- {
- printf ("timer_create: %m\n");
- return 1;
- }
- timer_delete (t);
-
- /* Get the child started chewing. */
- if (write (pipefd[1], "x", 1) != 1)
- {
- printf ("write to pipe: %m\n");
- return 1;
- }
- close (pipefd[1]);
-
- return 0;
-}
-
-#else
-# define TEST_CLOCK_MISSING(clock) "process clocks"
-#endif
-
-#include "tst-timer4.c"