github.com/ccccaoqing/test@v0.0.0-20220510085219-3985d23445c0/src/syscall/syscall_darwin_386.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  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) error {
    30  	// The tv passed to gettimeofday must be non-nil.
    31  	// Before macOS Sierra (10.12), tv was otherwise unused and
    32  	// the answers came back in the two registers.
    33  	// As of Sierra, gettimeofday return zeros and populates
    34  	// tv itself.
    35  	sec, usec, err := gettimeofday(tv)
    36  	if err != nil {
    37  		return err
    38  	}
    39  	if sec != 0 || usec != 0 {
    40  		tv.Sec = int32(sec)
    41  		tv.Usec = int32(usec)
    42  	}
    43  	return nil
    44  }
    45  
    46  func SetKevent(k *Kevent_t, fd, mode, flags int) {
    47  	k.Ident = uint32(fd)
    48  	k.Filter = int16(mode)
    49  	k.Flags = uint16(flags)
    50  }
    51  
    52  func (iov *Iovec) SetLen(length int) {
    53  	iov.Len = uint32(length)
    54  }
    55  
    56  func (msghdr *Msghdr) SetControllen(length int) {
    57  	msghdr.Controllen = uint32(length)
    58  }
    59  
    60  func (cmsg *Cmsghdr) SetLen(length int) {
    61  	cmsg.Len = uint32(length)
    62  }
    63  
    64  func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
    65  	var length = uint64(count)
    66  
    67  	_, _, e1 := Syscall9(SYS_SENDFILE, uintptr(infd), uintptr(outfd), uintptr(*offset), uintptr(*offset>>32), uintptr(unsafe.Pointer(&length)), 0, 0, 0, 0)
    68  
    69  	written = int(length)
    70  
    71  	if e1 != 0 {
    72  		err = e1
    73  	}
    74  	return
    75  }
    76  
    77  func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) // sic