Author: mav
Date: Thu Feb 28 10:21:04 2013
New Revision: 247452
URL: http://svnweb.freebsd.org/changeset/base/247452
Log:
Introduce sbintime_t type -- the simplified version of struct bintime,
using 32.32 fixed point in form of single int64_t. It is much easier to
use in cases where additional precision and range of struct bintime is
not required.
Reviewed by: bde (previous version), davide
Modified:
head/sys/sys/time.h
Modified: head/sys/sys/time.h
==============================================================================
--- head/sys/sys/time.h Thu Feb 28 08:19:55 2013 (r247451)
+++ head/sys/sys/time.h Thu Feb 28 10:21:04 2013 (r247452)
@@ -109,6 +109,37 @@ bintime_mul(struct bintime *bt, u_int x)
((a)->frac cmp (b)->frac) : \
((a)->sec cmp (b)->sec))
+typedef int64_t sbintime_t;
+#define SBT_1S ((sbintime_t)1 << 32)
+#define SBT_1M (SBT_1S * 60)
+#define SBT_1MS (SBT_1S / 1000)
+#define SBT_1US (SBT_1S / 1000000)
+#define SBT_1NS (SBT_1S / 1000000000)
+
+static __inline int
+sbintime_getsec(sbintime_t sbt)
+{
+
+ return (sbt >> 32);
+}
+
+static __inline sbintime_t
+bttosbt(const struct bintime bt)
+{
+
+ return (((sbintime_t)bt.sec << 32) + (bt.frac >> 32));
+}
+
+static __inline struct bintime
+sbttobt(sbintime_t sbt)
+{
+ struct bintime bt;
+
+ bt.sec = sbt >> 32;
+ bt.frac = sbt << 32;
+ return (bt);
+}
+
/*-
* Background information:
*
@@ -156,6 +187,42 @@ timeval2bintime(const struct timeval *tv
/* 18446744073709 = int(2^64 / 1000000) */
bt->frac = tv->tv_usec * (uint64_t)18446744073709LL;
}
+
+static __inline struct timespec
+sbttots(sbintime_t sbt)
+{
+ struct timespec ts;
+
+ ts.tv_sec = sbt >> 32;
+ ts.tv_nsec = ((uint64_t)1000000000 * (uint32_t)sbt) >> 32;
+ return (ts);
+}
+
+static __inline sbintime_t
+tstosbt(struct timespec ts)
+{
+
+ return (((sbintime_t)ts.tv_sec << 32) +
+ (ts.tv_nsec * (((uint64_t)1 << 63) / 500000000) >> 32));
+}
+
+static __inline struct timeval
+sbttotv(sbintime_t sbt)
+{
+ struct timeval tv;
+
+ tv.tv_sec = sbt >> 32;
+ tv.tv_usec = ((uint64_t)1000000 * (uint32_t)sbt) >> 32;
+ return (tv);
+}
+
+static __inline sbintime_t
+tvtosbt(struct timeval tv)
+{
+
+ return (((sbintime_t)tv.tv_sec << 32) +
+ (tv.tv_usec * (((uint64_t)1 << 63) / 500000) >> 32));
+}
#endif /* __BSD_VISIBLE */
#ifdef _KERNEL
@@ -317,6 +384,15 @@ void binuptime(struct bintime *bt);
void nanouptime(struct timespec *tsp);
void microuptime(struct timeval *tvp);
+static __inline sbintime_t
+sbinuptime(void)
+{
+ struct bintime bt;
+
+ binuptime(&bt);
+ return (bttosbt(bt));
+}
+
void bintime(struct bintime *bt);
void nanotime(struct timespec *tsp);
void microtime(struct timeval *tvp);
@@ -325,6 +401,15 @@ void getbinuptime(struct bintime *bt);
void getnanouptime(struct timespec *tsp);
void getmicrouptime(struct timeval *tvp);
+static __inline sbintime_t
+getsbinuptime(void)
+{
+ struct bintime bt;
+
+ getbinuptime(&bt);
+ return (bttosbt(bt));
+}
+
void getbintime(struct bintime *bt);
void getnanotime(struct timespec *tsp);
void getmicrotime(struct timeval *tvp);
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