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 setTimespec(sec, nsec int64) Timespec { 10 return Timespec{Sec: int32(sec), Nsec: int32(nsec)} 11 } 12 13 func setTimeval(sec, usec int64) Timeval { 14 return Timeval{Sec: int32(sec), Usec: int32(usec)} 15 } 16 17 //sysnb gettimeofday(tp *Timeval) (sec int32, usec int32, err error) 18 func Gettimeofday(tv *Timeval) error { 19 // The tv passed to gettimeofday must be non-nil. 20 // Before macOS Sierra (10.12), tv was otherwise unused and 21 // the answers came back in the two registers. 22 // As of Sierra, gettimeofday return zeros and populates 23 // tv itself. 24 sec, usec, err := gettimeofday(tv) 25 if err != nil { 26 return err 27 } 28 if sec != 0 || usec != 0 { 29 tv.Sec = int32(sec) 30 tv.Usec = int32(usec) 31 } 32 return nil 33 } 34 35 func SetKevent(k *Kevent_t, fd, mode, flags int) { 36 k.Ident = uint32(fd) 37 k.Filter = int16(mode) 38 k.Flags = uint16(flags) 39 } 40 41 func (iov *Iovec) SetLen(length int) { 42 iov.Len = uint32(length) 43 } 44 45 func (msghdr *Msghdr) SetControllen(length int) { 46 msghdr.Controllen = uint32(length) 47 } 48 49 func (cmsg *Cmsghdr) SetLen(length int) { 50 cmsg.Len = uint32(length) 51 } 52 53 func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { 54 var length = uint64(count) 55 56 _, _, e1 := Syscall9(SYS_SENDFILE, uintptr(infd), uintptr(outfd), uintptr(*offset), uintptr(*offset>>32), uintptr(unsafe.Pointer(&length)), 0, 0, 0, 0) 57 58 written = int(length) 59 60 if e1 != 0 { 61 err = e1 62 } 63 return 64 } 65 66 func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) // sic 67
