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 package syscall 6 7 import "unsafe" 8 9 func Getpagesize() int { return 4096 } 10 11 func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) } 12 13 func NsecToTimespec(nsec int64) (ts Timespec) { 14 ts.Sec = nsec / 1e9 15 ts.Nsec = nsec % 1e9 16 return 17 } 18 19 func TimevalToNsec(tv Timeval) int64 { return int64(tv.Sec)*1e9 + int64(tv.Usec)*1e3 } 20 21 func NsecToTimeval(nsec int64) (tv Timeval) { 22 nsec += 999 // round up to microsecond 23 tv.Usec = nsec % 1e9 / 1e3 24 tv.Sec = int64(nsec / 1e9) 25 return 26 } 27 28 func SetKevent(k *Kevent_t, fd, mode, flags int) { 29 k.Ident = uint64(fd) 30 k.Filter = int16(mode) 31 k.Flags = uint16(flags) 32 } 33 34 func (iov *Iovec) SetLen(length int) { 35 iov.Len = uint64(length) 36 } 37 38 func (msghdr *Msghdr) SetControllen(length int) { 39 msghdr.Controllen = uint32(length) 40 } 41 42 func (cmsg *Cmsghdr) SetLen(length int) { 43 cmsg.Len = uint32(length) 44 } 45 46 func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { 47 var writtenOut uint64 = 0 48 _, _, e1 := Syscall9(SYS_SENDFILE, uintptr(infd), uintptr(outfd), uintptr(*offset), uintptr(count), 0, uintptr(unsafe.Pointer(&writtenOut)), 0, 0, 0) 49 50 written = int(writtenOut) 51 52 if e1 != 0 { 53 err = e1 54 } 55 return 56 } 57 58 func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) 59
