Various additions and fixes.

src/lib9/time.c

@@ -0,0 +1,58 @@
+#include <sys/time.h>
+#include <sys/resource.h>
+
+#include <u.h>
+#define NOPLAN9DEFINES
+#include <libc.h>
+
+long
+p9times(long *t)
+{
+	struct rusage ru, cru;
+
+	if(getrusage(0, &ru) < 0 || getrusage(-1, &cru) < 0)
+		return -1;
+
+	t[0] = ru.ru_utime.tv_sec*1000 + ru.ru_utime.tv_usec/1000;
+	t[1] = ru.ru_stime.tv_sec*1000 + ru.ru_stime.tv_usec/1000;
+	t[2] = cru.ru_utime.tv_sec*1000 + cru.ru_utime.tv_usec/1000;
+	t[3] = cru.ru_stime.tv_sec*1000 + cru.ru_stime.tv_usec/1000;
+
+	/* BUG */
+	return t[0]+t[1]+t[2]+t[3];
+}
+
+double
+p9cputime(void)
+{
+	long t[4];
+	double d;
+
+	if(p9times(t) < 0)
+		return -1.0;
+
+	d = (double)t[0]+(double)t[1]+(double)t[2]+(double)t[3];
+	return d/1000.0;
+}
+
+vlong
+p9nsec(void)
+{
+	struct timeval tv;
+
+	if(gettimeofday(&tv, 0) < 0)
+		return -1;
+
+	return (vlong)tv.tv_sec*1000*1000*1000 + tv.tv_usec*1000;
+}
+
+long
+p9time(long *tt)
+{
+	long t;
+	t = time(0);
+	if(tt)
+		*tt = t;
+	return t;
+}
+