patch-2.1.68 linux/include/linux/time.h

• Lines: 40
• Date: Sun Nov 30 10:59:03 1997
• Orig file: v2.1.67/linux/include/linux/time.h
• Orig date: Fri Dec 27 02:04:48 1996

diff -u --recursive --new-file v2.1.67/linux/include/linux/time.h linux/include/linux/time.h
@@ -1,6 +1,8 @@
 #ifndef _LINUX_TIME_H
 #define _LINUX_TIME_H
 
+#include <asm/param.h>
+
 #ifndef _STRUCT_TIMESPEC
 #define _STRUCT_TIMESPEC
 struct timespec {
@@ -9,6 +11,30 @@
 };
 #endif /* _STRUCT_TIMESPEC */
 
+/*
+ * change timeval to jiffies, trying to avoid the
+ * most obvious overflows..
+ */
+static inline unsigned long
+timespec_to_jiffies(struct timespec *value)
+{
+	unsigned long sec = value->tv_sec;
+	long nsec = value->tv_nsec;
+
+	if (sec > ((long)(~0UL >> 1) / HZ))
+		return ~0UL >> 1;
+	nsec += 1000000000L / HZ - 1;
+	nsec /= 1000000000L / HZ;
+	return HZ * sec + nsec;
+}
+
+static inline void
+jiffies_to_timespec(unsigned long jiffies, struct timespec *value)
+{
+	value->tv_nsec = (jiffies % HZ) * (1000000000L / HZ);
+	value->tv_sec = jiffies / HZ;
+}
+ 
 struct timeval {
 	int	tv_sec;		/* seconds */
 	int	tv_usec;	/* microseconds */