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fcntl_darwin.go (806B)

      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 }