Export wctime() and cputime() from rtspin to library clients

The timing functions are quite handy when building benchmark tasks.
Avoid copy&paste reuse by making them available via the library.

1 files changed, 23 insertions, 0 deletions

diff --git a/src/clocks.c b/src/clocks.c
new file mode 100644
index 0000000..fcb94e5
--- /dev/null
+++ b/src/clocks.c
@@ -0,0 +1,23 @@
+#include <stdio.h>
+
+#include <sys/time.h>
+#include <time.h>
+
+/* CPU time consumed so far in seconds */
+double cputime(void)
+{
+        struct timespec ts;
+        int err;
+        err = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
+        if (err != 0)
+                perror("clock_gettime");
+        return (ts.tv_sec + 1E-9 * ts.tv_nsec);
+}
+
+/* wall-clock time in seconds */
+double wctime(void)
+{
+        struct timeval tv;
+        gettimeofday(&tv, NULL);
+        return (tv.tv_sec + 1E-6 * tv.tv_usec);
+}