1 files changed, 17 insertions, 31 deletions

diff --git a/vendor/github.com/ncruces/go-sqlite3/vfs/os_linux.go b/vendor/github.com/ncruces/go-sqlite3/vfs/os_linux.go
index f5841fc20..6199c7b00 100644
--- a/vendor/github.com/ncruces/go-sqlite3/vfs/os_linux.go
+++ b/vendor/github.com/ncruces/go-sqlite3/vfs/os_linux.go
@@ -3,7 +3,6 @@
 package vfs
 
 import (
-	"math/rand"
 	"os"
 	"time"
 
@@ -22,16 +21,12 @@ func osAllocate(file *os.File, size int64) error {
 	return unix.Fallocate(int(file.Fd()), 0, 0, size)
 }
 
-func osUnlock(file *os.File, start, len int64) _ErrorCode {
-	err := unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLK, &unix.Flock_t{
-		Type:  unix.F_UNLCK,
-		Start: start,
-		Len:   len,
-	})
-	if err != nil {
-		return _IOERR_UNLOCK
-	}
-	return _OK
+func osReadLock(file *os.File, start, len int64, timeout time.Duration) _ErrorCode {
+	return osLock(file, unix.F_RDLCK, start, len, timeout, _IOERR_RDLOCK)
+}
+
+func osWriteLock(file *os.File, start, len int64, timeout time.Duration) _ErrorCode {
+	return osLock(file, unix.F_WRLCK, start, len, timeout, _IOERR_LOCK)
 }
 
 func osLock(file *os.File, typ int16, start, len int64, timeout time.Duration, def _ErrorCode) _ErrorCode {
@@ -42,31 +37,22 @@ func osLock(file *os.File, typ int16, start, len int64, timeout time.Duration, d
 	}
 	var err error
 	switch {
-	case timeout == 0:
-		err = unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLK, &lock)
 	case timeout < 0:
 		err = unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLKW, &lock)
 	default:
-		before := time.Now()
-		for {
-			err = unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLK, &lock)
-			if errno, _ := err.(unix.Errno); errno != unix.EAGAIN {
-				break
-			}
-			if time.Since(before) > timeout {
-				break
-			}
-			const sleepIncrement = 1024*1024 - 1 // power of two, ~1ms
-			time.Sleep(time.Duration(rand.Int63() & sleepIncrement))
-		}
+		err = unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLK, &lock)
 	}
 	return osLockErrorCode(err, def)
 }
 
-func osReadLock(file *os.File, start, len int64, timeout time.Duration) _ErrorCode {
-	return osLock(file, unix.F_RDLCK, start, len, timeout, _IOERR_RDLOCK)
-}
-
-func osWriteLock(file *os.File, start, len int64, timeout time.Duration) _ErrorCode {
-	return osLock(file, unix.F_WRLCK, start, len, timeout, _IOERR_LOCK)
+func osUnlock(file *os.File, start, len int64) _ErrorCode {
+	err := unix.FcntlFlock(file.Fd(), unix.F_OFD_SETLK, &unix.Flock_t{
+		Type:  unix.F_UNLCK,
+		Start: start,
+		Len:   len,
+	})
+	if err != nil {
+		return _IOERR_UNLOCK
+	}
+	return _OK
 }