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Source file src/syscall/timestruct.go

     1	// Copyright 2016 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris
     6	
     7	package syscall
     8	
     9	// TimespecToNsec converts a Timespec value into a number of
    10	// nanoseconds since the Unix epoch.
    11	func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
    12	
    13	// NsecToTimespec takes a number of nanoseconds since the Unix epoch
    14	// and returns the corresponding Timespec value.
    15	func NsecToTimespec(nsec int64) Timespec {
    16		sec := nsec / 1e9
    17		nsec = nsec % 1e9
    18		if nsec < 0 {
    19			nsec += 1e9
    20			sec--
    21		}
    22		return setTimespec(sec, nsec)
    23	}
    24	
    25	// TimevalToNsec converts a Timeval value into a number of nanoseconds
    26	// since the Unix epoch.
    27	func TimevalToNsec(tv Timeval) int64 { return int64(tv.Sec)*1e9 + int64(tv.Usec)*1e3 }
    28	
    29	// NsecToTimeval takes a number of nanoseconds since the Unix epoch
    30	// and returns the corresponding Timeval value.
    31	func NsecToTimeval(nsec int64) Timeval {
    32		nsec += 999 // round up to microsecond
    33		usec := nsec % 1e9 / 1e3
    34		sec := nsec / 1e9
    35		if usec < 0 {
    36			usec += 1e6
    37			sec--
    38		}
    39		return setTimeval(sec, usec)
    40	}
    41	

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