Source file src/internal/syscall/unix/nonblocking_darwin.go

     1	// Copyright 2018 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 darwin
     6	
     7	package unix
     8	
     9	import (
    10		"syscall"
    11		_ "unsafe" // for go:linkname
    12	)
    13	
    14	func IsNonblock(fd int) (nonblocking bool, err error) {
    15		flag, e1 := fcntl(fd, syscall.F_GETFL, 0)
    16		if e1 != nil {
    17			return false, e1
    18		}
    19		return flag&syscall.O_NONBLOCK != 0, nil
    20	}
    21	
    22	// Implemented in syscall/syscall_darwin.go.
    23	//go:linkname fcntl syscall.fcntl
    24	func fcntl(fd int, cmd int, arg int) (int, error)
    25	

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