src/dedo.go: Simplify flags of flock()

1 files changed, 2 insertions, 9 deletions

diff --git a/src/dedo.go b/src/dedo.go
index ead56b8..8e37154 100644
--- a/src/dedo.go
+++ b/src/dedo.go
@@ -587,19 +587,12 @@ func fdatasync(db *DB) error {
 	return db.file.Sync()
 }
 
-
 // flock acquires an advisory lock on a file descriptor.
 func flock(db *DB) error {
-	const exclusive = true // FIXME: allow multiple processes to cooperate
+	const lockFlags = syscall.LOCK_EX | syscall.LOCK_NB
 
 	for {
-		flag := syscall.LOCK_SH
-		if exclusive {
-			flag = syscall.LOCK_EX
-		}
-
-		// Otherwise attempt to obtain an exclusive lock.
-		err := syscall.Flock(int(db.file.Fd()), flag|syscall.LOCK_NB)
+		err := syscall.Flock(int(db.file.Fd()), lockFlags)
 		if err == nil {
 			return nil
 		} else if err != syscall.EWOULDBLOCK {