syscall_darwin_amd64.go

Documentation: syscall

     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: sec, Nsec: nsec}
    11  }
    12  
    13  func setTimeval(sec, usec int64) Timeval {
    14  	return Timeval{Sec: sec, Usec: int32(usec)}
    15  }
    16  
    17  //sysnb	gettimeofday(tp *Timeval) (sec int64, 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 = sec
    30  		tv.Usec = usec
    31  	}
    32  	return nil
    33  }
    34  
    35  func SetKevent(k *Kevent_t, fd, mode, flags int) {
    36  	k.Ident = uint64(fd)
    37  	k.Filter = int16(mode)
    38  	k.Flags = uint16(flags)
    39  }
    40  
    41  func (iov *Iovec) SetLen(length int) {
    42  	iov.Len = uint64(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 := Syscall6(SYS_SENDFILE, uintptr(infd), uintptr(outfd), uintptr(*offset), uintptr(unsafe.Pointer(&length)), 0, 0)
    57  
    58  	written = int(length)
    59  
    60  	if e1 != 0 {
    61  		err = e1
    62  	}
    63  	return
    64  }
    65  
    66  func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno)
    67
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