github.com/dolotech/hongbao@v0.0.0-20191130105438-fd59d7a5dda5/src/golang.org/x/sys/unix/syscall_dragonfly_amd64.go (about)

     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  // +build amd64,dragonfly
     6  
     7  package unix
     8  
     9  import (
    10  	"syscall"
    11  	"unsafe"
    12  )
    13  
    14  func TimespecToNsec(ts Timespec) int64 { return int64(ts.Sec)*1e9 + int64(ts.Nsec) }
    15  
    16  func NsecToTimespec(nsec int64) (ts Timespec) {
    17  	ts.Sec = nsec / 1e9
    18  	ts.Nsec = nsec % 1e9
    19  	return
    20  }
    21  
    22  func NsecToTimeval(nsec int64) (tv Timeval) {
    23  	nsec += 999 // round up to microsecond
    24  	tv.Usec = nsec % 1e9 / 1e3
    25  	tv.Sec = int64(nsec / 1e9)
    26  	return
    27  }
    28  
    29  func SetKevent(k *Kevent_t, fd, mode, flags int) {
    30  	k.Ident = uint64(fd)
    31  	k.Filter = int16(mode)
    32  	k.Flags = uint16(flags)
    33  }
    34  
    35  func (iov *Iovec) SetLen(length int) {
    36  	iov.Len = uint64(length)
    37  }
    38  
    39  func (msghdr *Msghdr) SetControllen(length int) {
    40  	msghdr.Controllen = uint32(length)
    41  }
    42  
    43  func (cmsg *Cmsghdr) SetLen(length int) {
    44  	cmsg.Len = uint32(length)
    45  }
    46  
    47  func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
    48  	var writtenOut uint64 = 0
    49  	_, _, e1 := Syscall9(SYS_SENDFILE, uintptr(infd), uintptr(outfd), uintptr(*offset), uintptr(count), 0, uintptr(unsafe.Pointer(&writtenOut)), 0, 0, 0)
    50  
    51  	written = int(writtenOut)
    52  
    53  	if e1 != 0 {
    54  		err = e1
    55  	}
    56  	return
    57  }
    58  
    59  func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err syscall.Errno)