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-rw-r--r--src/time/clock.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/src/time/clock.c b/src/time/clock.c
index 78403af3..c348e398 100644
--- a/src/time/clock.c
+++ b/src/time/clock.c
@@ -1,15 +1,18 @@
#include <time.h>
-#include <sys/times.h>
-#include "syscall.h"
+#include <limits.h>
int __clock_gettime(clockid_t, struct timespec *);
clock_t clock()
{
struct timespec ts;
- struct tms tms;
- if (!__clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts))
- return ts.tv_sec*1000000 + ts.tv_nsec/1000;
- __syscall(SYS_times, &tms);
- return (tms.tms_utime + tms.tms_stime)*10000;
+
+ if (__clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts))
+ return -1;
+
+ if (ts.tv_sec > LONG_MAX/1000000
+ || ts.tv_nsec/1000 > LONG_MAX-1000000*ts.tv_sec)
+ return -1;
+
+ return ts.tv_sec*1000000 + ts.tv_nsec/1000;
}