Changeset daa90e8 in mainline for uspace/lib/libc/generic/time.c

Timestamp:

2007-07-02T18:30:54Z (18 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

7b63b6b

Parents:

f2f0392

Message:

Remove duplicit and empty time.h from libc.
Move timeval functions from async.c to time.c.

File:

• uspace/lib/libc/generic/time.c (modified) (1 diff)

uspace/lib/libc/generic/time.c

@@ -54 +54 @@
         volatile sysarg_t seconds2;
 } *ktime = NULL;
+
+/** Add microseconds to given timeval.
+ *
+ * @param tv            Destination timeval.
+ * @param usecs         Number of microseconds to add.
+ */
+void tv_add(struct timeval *tv, suseconds_t usecs)
+{
+        tv->tv_sec += usecs / 1000000;
+        tv->tv_usec += usecs % 1000000;
+        if (tv->tv_usec > 1000000) {
+                tv->tv_sec++;
+                tv->tv_usec -= 1000000;
+        }
+}
+
+/** Subtract two timevals.
+ *
+ * @param tv1           First timeval.
+ * @param tv2           Second timeval.
+ *
+ * @return              Return difference between tv1 and tv2 (tv1 - tv2) in
+ *                      microseconds.
+ */
+suseconds_t tv_sub(struct timeval *tv1, struct timeval *tv2)
+{
+        suseconds_t result;
+
+        result = tv1->tv_usec - tv2->tv_usec;
+        result += (tv1->tv_sec - tv2->tv_sec) * 1000000;
+
+        return result;
+}
+
+/** Decide if one timeval is greater than the other.
+ *
+ * @param t1            First timeval.
+ * @param t2            Second timeval.
+ *
+ * @return              Return true tv1 is greater than tv2. Otherwise return
+ *                      false.
+ */
+int tv_gt(struct timeval *tv1, struct timeval *tv2)
+{
+        if (tv1->tv_sec > tv2->tv_sec)
+                return 1;
+        if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec > tv2->tv_usec)
+                return 1;
+        return 0;
+}
+
+/** Decide if one timeval is greater than or equal to the other.
+ *
+ * @param tv1           First timeval.
+ * @param tv2           Second timeval.
+ *
+ * @return              Return true if tv1 is greater than or equal to tv2.
+ *                      Otherwise return false.
+ */
+int tv_gteq(struct timeval *tv1, struct timeval *tv2)
+{
+        if (tv1->tv_sec > tv2->tv_sec)
+                return 1;
+        if (tv1->tv_sec == tv2->tv_sec && tv1->tv_usec >= tv2->tv_usec)
+                return 1;
+        return 0;
+}