Rename lib files to and prefix lib function names

[khatus.git] / x5 / khlib_time.c

diff --git a/x5/khlib_time.c b/x5/khlib_time.c
new file mode 100644 (file)
index 0000000..c55e0af
--- /dev/null
+++ b/x5/khlib_time.c
@@ -0,0 +1,43 @@
+#include <errno.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "khlib_log.h"
+#include "khlib_time.h"
+
+struct timespec
+khlib_timespec_of_float(double n)
+{
+       double integral;
+       double fractional;
+       struct timespec t;
+
+       fractional = modf(n, &integral);
+       t.tv_sec = (int) integral;
+       t.tv_nsec = (int) (1E9 * fractional);
+
+       return t;
+}
+
+void
+khlib_sleep(struct timespec *t)
+{
+       struct timespec remainder;
+
+       if (nanosleep(t, &remainder) < 0) {
+               if (errno == EINTR) {
+                       khlib_warn(
+                           "nanosleep interrupted. Remainder: "
+                           "{ tv_sec = %ld, tv_nsec = %ld }",
+                           remainder.tv_sec, remainder.tv_nsec);
+                       /* No big deal if we occasionally sleep less,
+                        * so not attempting to correct after an interruption.
+                        */
+               } else {
+                       khlib_fatal("nanosleep: %s\n", strerror(errno));
+               }
+       }
+}