fcntl_darwin.go

     1  // Copyright 2019 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 unix
     6  
     7  import "unsafe"
     8  
     9  // FcntlInt performs a fcntl syscall on fd with the provided command and argument.
    10  func FcntlInt(fd uintptr, cmd, arg int) (int, error) {
    11  	return fcntl(int(fd), cmd, arg)
    12  }
    13  
    14  // FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command.
    15  func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error {
    16  	_, err := fcntl(int(fd), cmd, int(uintptr(unsafe.Pointer(lk))))
    17  	return err
    18  }
    19  
    20  // FcntlFstore performs a fcntl syscall for the F_PREALLOCATE command.
    21  func FcntlFstore(fd uintptr, cmd int, fstore *Fstore_t) error {
    22  	_, err := fcntl(int(fd), cmd, int(uintptr(unsafe.Pointer(fstore))))
    23  	return err
    24  }
    25
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