github.com/ncruces/go-sqlite3@v0.15.1-0.20240520133447-53eef1510ff0/vfs/os_bsd.go (about)

     1  //go:build (freebsd || openbsd || netbsd || dragonfly || illumos || sqlite3_flock) && !sqlite3_nosys
     2  
     3  package vfs
     4  
     5  import (
     6  	"os"
     7  	"time"
     8  
     9  	"golang.org/x/sys/unix"
    10  )
    11  
    12  func osUnlock(file *os.File, start, len int64) _ErrorCode {
    13  	if start == 0 && len == 0 {
    14  		err := unix.Flock(int(file.Fd()), unix.LOCK_UN)
    15  		if err != nil {
    16  			return _IOERR_UNLOCK
    17  		}
    18  	}
    19  	return _OK
    20  }
    21  
    22  func osLock(file *os.File, how int, def _ErrorCode) _ErrorCode {
    23  	err := unix.Flock(int(file.Fd()), how)
    24  	return osLockErrorCode(err, def)
    25  }
    26  
    27  func osReadLock(file *os.File, _ /*start*/, _ /*len*/ int64, _ /*timeout*/ time.Duration) _ErrorCode {
    28  	return osLock(file, unix.LOCK_SH|unix.LOCK_NB, _IOERR_RDLOCK)
    29  }
    30  
    31  func osWriteLock(file *os.File, _ /*start*/, _ /*len*/ int64, _ /*timeout*/ time.Duration) _ErrorCode {
    32  	return osLock(file, unix.LOCK_EX|unix.LOCK_NB, _IOERR_LOCK)
    33  }