Prepare SPL repo to merge with ZFS repo

[mirror_spl.git] / include / spl / sys / time.h

diff --git a/include/spl/sys/time.h b/include/spl/sys/time.h
new file mode 100644 (file)
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--- /dev/null
+++ b/include/spl/sys/time.h
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+/*
+ *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
+ *  Copyright (C) 2007 The Regents of the University of California.
+ *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
+ *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
+ *  UCRL-CODE-235197
+ *
+ *  This file is part of the SPL, Solaris Porting Layer.
+ *  For details, see <http://zfsonlinux.org/>.
+ *
+ *  The SPL is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License as published by the
+ *  Free Software Foundation; either version 2 of the License, or (at your
+ *  option) any later version.
+ *
+ *  The SPL is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _SPL_TIME_H
+#define        _SPL_TIME_H
+
+#include <linux/module.h>
+#include <linux/time.h>
+#include <sys/types.h>
+#include <sys/timer.h>
+
+#if defined(CONFIG_64BIT)
+#define        TIME_MAX                        INT64_MAX
+#define        TIME_MIN                        INT64_MIN
+#else
+#define        TIME_MAX                        INT32_MAX
+#define        TIME_MIN                        INT32_MIN
+#endif
+
+#define        SEC                             1
+#define        MILLISEC                        1000
+#define        MICROSEC                        1000000
+#define        NANOSEC                         1000000000
+
+#define        MSEC2NSEC(m)    ((hrtime_t)(m) * (NANOSEC / MILLISEC))
+#define        NSEC2MSEC(n)    ((n) / (NANOSEC / MILLISEC))
+
+#define        USEC2NSEC(m)    ((hrtime_t)(m) * (NANOSEC / MICROSEC))
+#define        NSEC2USEC(n)    ((n) / (NANOSEC / MICROSEC))
+
+#define        NSEC2SEC(n)     ((n) / (NANOSEC / SEC))
+#define        SEC2NSEC(m)     ((hrtime_t)(m) * (NANOSEC / SEC))
+
+static const int hz = HZ;
+
+#define        TIMESPEC_OVERFLOW(ts)           \
+       ((ts)->tv_sec < TIME_MIN || (ts)->tv_sec > TIME_MAX)
+
+static inline void
+gethrestime(timestruc_t *now)
+{
+       *now = current_kernel_time();
+}
+
+static inline time_t
+gethrestime_sec(void)
+{
+       struct timespec ts;
+       ts = current_kernel_time();
+       return (ts.tv_sec);
+}
+
+static inline hrtime_t
+gethrtime(void)
+{
+       struct timespec now;
+       getrawmonotonic(&now);
+       return (((hrtime_t)now.tv_sec * NSEC_PER_SEC) + now.tv_nsec);
+}
+
+#endif  /* _SPL_TIME_H */