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Source file src/syscall/timestruct.go

Documentation: syscall

     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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