github.com/maenmax/kairep@v0.0.0-20210218001208-55bf3df36788/src/golang.org/x/sys/windows/syscall.go (about) 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 // The primary use of this package is inside other packages that provide a more 15 // portable interface to the system, such as "os", "time" and "net". Use 16 // those packages rather than this one if you can. 17 // For details of the functions and data types in this package consult 18 // the manuals for the appropriate operating system. 19 // These calls return err == nil to indicate success; otherwise 20 // err represents an operating system error describing the failure and 21 // holds a value of type syscall.Errno. 22 package windows // import "golang.org/x/sys/windows" 23 24 import ( 25 "syscall" 26 ) 27 28 // ByteSliceFromString returns a NUL-terminated slice of bytes 29 // containing the text of s. If s contains a NUL byte at any 30 // location, it returns (nil, syscall.EINVAL). 31 func ByteSliceFromString(s string) ([]byte, error) { 32 for i := 0; i < len(s); i++ { 33 if s[i] == 0 { 34 return nil, syscall.EINVAL 35 } 36 } 37 a := make([]byte, len(s)+1) 38 copy(a, s) 39 return a, nil 40 } 41 42 // BytePtrFromString returns a pointer to a NUL-terminated array of 43 // bytes containing the text of s. If s contains a NUL byte at any 44 // location, it returns (nil, syscall.EINVAL). 45 func BytePtrFromString(s string) (*byte, error) { 46 a, err := ByteSliceFromString(s) 47 if err != nil { 48 return nil, err 49 } 50 return &a[0], nil 51 } 52 53 // Single-word zero for use when we need a valid pointer to 0 bytes. 54 // See mksyscall.pl. 55 var _zero uintptr 56 57 func (ts *Timespec) Unix() (sec int64, nsec int64) { 58 return int64(ts.Sec), int64(ts.Nsec) 59 } 60 61 func (tv *Timeval) Unix() (sec int64, nsec int64) { 62 return int64(tv.Sec), int64(tv.Usec) * 1000 63 } 64 65 func (ts *Timespec) Nano() int64 { 66 return int64(ts.Sec)*1e9 + int64(ts.Nsec) 67 } 68 69 func (tv *Timeval) Nano() int64 { 70 return int64(tv.Sec)*1e9 + int64(tv.Usec)*1000 71 }