libgo/go/time/sys_windows.go

   1 // Copyright 2011 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 package time
   6
   7 import (
   8         "errors"
   9         "syscall"
  10 )
  11
  12 // for testing: whatever interrupts a sleep
  13 func interrupt() {
  14 }
  15
  16 func open(name string) (uintptr, error) {
  17         fd, err := syscall.Open(name, syscall.O_RDONLY, 0)
  18         if err != nil {
  19                 return 0, err
  20         }
  21         return uintptr(fd), nil
  22 }
  23
  24 func read(fd uintptr, buf []byte) (int, error) {
  25         return syscall.Read(syscall.Handle(fd), buf)
  26 }
  27
  28 func closefd(fd uintptr) {
  29         syscall.Close(syscall.Handle(fd))
  30 }
  31
  32 func preadn(fd uintptr, buf []byte, off int) error {
  33         whence := seekStart
  34         if off < 0 {
  35                 whence = seekEnd
  36         }
  37         if _, err := syscall.Seek(syscall.Handle(fd), int64(off), whence); err != nil {
  38                 return err
  39         }
  40         for len(buf) > 0 {
  41                 m, err := syscall.Read(syscall.Handle(fd), buf)
  42                 if m <= 0 {
  43                         if err == nil {
  44                                 return errors.New("short read")
  45                         }
  46                         return err
  47                 }
  48                 buf = buf[m:]
  49         }
  50         return nil
  51 }