1 // Copyright 2009 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 windows 6 7 // Package windows contains an interface to the low-level operating system 8 // primitives. OS details vary depending on the underlying system, and 9 // by default, godoc will display the OS-specific documentation for the current 10 // system. If you want godoc to display syscall documentation for another 11 // system, set $GOOS and $GOARCH to the desired system. For example, if 12 // you want to view documentation for freebsd/arm on linux/amd64, set $GOOS 13 // to freebsd and $GOARCH to arm. 14 // 15 // The primary use of this package is inside other packages that provide a more 16 // portable interface to the system, such as "os", "time" and "net". Use 17 // those packages rather than this one if you can. 18 // 19 // For details of the functions and data types in this package consult 20 // the manuals for the appropriate operating system. 21 // 22 // These calls return err == nil to indicate success; otherwise 23 // err represents an operating system error describing the failure and 24 // holds a value of type syscall.Errno. 25 package windows // import "golang.org/x/sys/windows" 26 27 import ( 28 "syscall" 29 ) 30 31 // ByteSliceFromString returns a NUL-terminated slice of bytes 32 // containing the text of s. If s contains a NUL byte at any 33 // location, it returns (nil, syscall.EINVAL). 34 func ByteSliceFromString(s string) ([]byte, error) { 35 for i := 0; i < len(s); i++ { 36 if s[i] == 0 { 37 return nil, syscall.EINVAL 38 } 39 } 40 a := make([]byte, len(s)+1) 41 copy(a, s) 42 return a, nil 43 } 44 45 // BytePtrFromString returns a pointer to a NUL-terminated array of 46 // bytes containing the text of s. If s contains a NUL byte at any 47 // location, it returns (nil, syscall.EINVAL). 48 func BytePtrFromString(s string) (*byte, error) { 49 a, err := ByteSliceFromString(s) 50 if err != nil { 51 return nil, err 52 } 53 return &a[0], nil 54 } 55 56 // Single-word zero for use when we need a valid pointer to 0 bytes. 57 // See mksyscall.pl. 58 var _zero uintptr 59 60 func (ts *Timespec) Unix() (sec int64, nsec int64) { 61 return int64(ts.Sec), int64(ts.Nsec) 62 } 63 64 func (tv *Timeval) Unix() (sec int64, nsec int64) { 65 return int64(tv.Sec), int64(tv.Usec) * 1000 66 } 67 68 func (ts *Timespec) Nano() int64 { 69 return int64(ts.Sec)*1e9 + int64(ts.Nsec) 70 } 71 72 func (tv *Timeval) Nano() int64 { 73 return int64(tv.Sec)*1e9 + int64(tv.Usec)*1000 74 } 75