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 = int32(nsec / 1e9) 15 ts.Nsec = int32(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 = int32(nsec % 1e9 / 1e3) 24 tv.Sec = int32(nsec / 1e9) 25 return 26 } 27 28 //sysnb gettimeofday(tp *Timeval) (sec int32, usec int32, err error) 29 func Gettimeofday(tv *Timeval) (err error) { 30 // The tv passed to gettimeofday must be non-nil 31 // but is otherwise unused. The answers come back 32 // in the two registers. 33 sec, usec, err := gettimeofday(tv) 34 tv.Sec = int32(sec) 35 tv.Usec = int32(usec) 36 return err 37 } 38 39 func SetKevent(k *Kevent_t, fd, mode, flags int) { 40 k.Ident = uint32(fd) 41 k.Filter = int16(mode) 42 k.Flags = uint16(flags) 43 } 44 45 func (iov *Iovec) SetLen(length int) { 46 iov.Len = uint32(length) 47 } 48 49 func (msghdr *Msghdr) SetControllen(length int) { 50 msghdr.Controllen = uint32(length) 51 } 52 53 func (cmsg *Cmsghdr) SetLen(length int) { 54 cmsg.Len = uint32(length) 55 } 56 57 func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { 58 var length = uint64(count) 59 60 _, _, e1 := Syscall9(SYS_SENDFILE, uintptr(infd), uintptr(outfd), uintptr(*offset), uintptr(*offset>>32), uintptr(unsafe.Pointer(&length)), 0, 0, 0, 0) 61 62 written = int(length) 63 64 if e1 != 0 { 65 err = e1 66 } 67 return 68 } 69 70 func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) // sic 71
