| // Copyright 2011 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // +build aix darwin dragonfly freebsd hurd js,wasm linux nacl netbsd openbsd solaris |
| |
| package time |
| |
| import ( |
| "errors" |
| "syscall" |
| ) |
| |
| // for testing: whatever interrupts a sleep |
| func interrupt() { |
| syscall.Kill(syscall.Getpid(), syscall.SIGCHLD) |
| } |
| |
| func open(name string) (uintptr, error) { |
| fd, err := syscall.Open(name, syscall.O_RDONLY, 0) |
| if err != nil { |
| return 0, err |
| } |
| return uintptr(fd), nil |
| } |
| |
| func read(fd uintptr, buf []byte) (int, error) { |
| return syscall.Read(int(fd), buf) |
| } |
| |
| func closefd(fd uintptr) { |
| syscall.Close(int(fd)) |
| } |
| |
| func preadn(fd uintptr, buf []byte, off int) error { |
| whence := seekStart |
| if off < 0 { |
| whence = seekEnd |
| } |
| if _, err := syscall.Seek(int(fd), int64(off), whence); err != nil { |
| return err |
| } |
| for len(buf) > 0 { |
| m, err := syscall.Read(int(fd), buf) |
| if m <= 0 { |
| if err == nil { |
| return errors.New("short read") |
| } |
| return err |
| } |
| buf = buf[m:] |
| } |
| return nil |
| } |