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  }