1 files changed, 36 insertions, 0 deletions
diff --git a/ext/sleepy_penguin/missing_clock_gettime.h b/ext/sleepy_penguin/missing_clock_gettime.h
new file mode 100644
index 0000000..632612b
--- /dev/null
+++ b/ext/sleepy_penguin/missing_clock_gettime.h
@@ -0,0 +1,36 @@
+/*
+ * this header includes functions to support broken systems
+ * without clock_gettime() or CLOCK_MONOTONIC
+ */
+
+#ifndef HAVE_TYPE_CLOCKID_T
+typedef int clockid_t;
+#endif
+
+#ifndef HAVE_CLOCK_GETTIME
+#  ifndef CLOCK_REALTIME
+#    define CLOCK_REALTIME 0 /* whatever */
+#  endif
+static int fake_clock_gettime(clockid_t clk_id, struct timespec *res)
+{
+        struct timeval tv;
+        int r = gettimeofday(&tv, NULL);
+
+        assert(0 == r && "gettimeofday() broke!?");
+        res->tv_sec = tv.tv_sec;
+        res->tv_nsec = tv.tv_usec * 1000;
+
+        return r;
+}
+#  define clock_gettime fake_clock_gettime
+#endif /* broken systems w/o clock_gettime() */
+
+/*
+ * UGH
+ * CLOCK_MONOTONIC is not guaranteed to be a macro, either
+ */
+#ifndef CLOCK_MONOTONIC
+#  if (!defined(_POSIX_MONOTONIC_CLOCK) || !defined(HAVE_CLOCK_MONOTONIC))
+#    define CLOCK_MONOTONIC CLOCK_REALTIME
+#  endif
+#endif