[VOL-2235] Mocks and interfaces for rw-core
This update consists of mocks that are used by the rw-core
during unit testing. It also includes interfaces used for unit
tests.
Change-Id: I20ca1455c358113c3aa897acc6355e0ddbc614b7
diff --git a/vendor/go.etcd.io/etcd/pkg/fileutil/lock_windows.go b/vendor/go.etcd.io/etcd/pkg/fileutil/lock_windows.go
new file mode 100644
index 0000000..b181723
--- /dev/null
+++ b/vendor/go.etcd.io/etcd/pkg/fileutil/lock_windows.go
@@ -0,0 +1,125 @@
+// Copyright 2015 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build windows
+
+package fileutil
+
+import (
+ "errors"
+ "fmt"
+ "os"
+ "syscall"
+ "unsafe"
+)
+
+var (
+ modkernel32 = syscall.NewLazyDLL("kernel32.dll")
+ procLockFileEx = modkernel32.NewProc("LockFileEx")
+
+ errLocked = errors.New("The process cannot access the file because another process has locked a portion of the file.")
+)
+
+const (
+ // https://msdn.microsoft.com/en-us/library/windows/desktop/aa365203(v=vs.85).aspx
+ LOCKFILE_EXCLUSIVE_LOCK = 2
+ LOCKFILE_FAIL_IMMEDIATELY = 1
+
+ // see https://msdn.microsoft.com/en-us/library/windows/desktop/ms681382(v=vs.85).aspx
+ errLockViolation syscall.Errno = 0x21
+)
+
+func TryLockFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {
+ f, err := open(path, flag, perm)
+ if err != nil {
+ return nil, err
+ }
+ if err := lockFile(syscall.Handle(f.Fd()), LOCKFILE_FAIL_IMMEDIATELY); err != nil {
+ f.Close()
+ return nil, err
+ }
+ return &LockedFile{f}, nil
+}
+
+func LockFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {
+ f, err := open(path, flag, perm)
+ if err != nil {
+ return nil, err
+ }
+ if err := lockFile(syscall.Handle(f.Fd()), 0); err != nil {
+ f.Close()
+ return nil, err
+ }
+ return &LockedFile{f}, nil
+}
+
+func open(path string, flag int, perm os.FileMode) (*os.File, error) {
+ if path == "" {
+ return nil, fmt.Errorf("cannot open empty filename")
+ }
+ var access uint32
+ switch flag {
+ case syscall.O_RDONLY:
+ access = syscall.GENERIC_READ
+ case syscall.O_WRONLY:
+ access = syscall.GENERIC_WRITE
+ case syscall.O_RDWR:
+ access = syscall.GENERIC_READ | syscall.GENERIC_WRITE
+ case syscall.O_WRONLY | syscall.O_CREAT:
+ access = syscall.GENERIC_ALL
+ default:
+ panic(fmt.Errorf("flag %v is not supported", flag))
+ }
+ fd, err := syscall.CreateFile(&(syscall.StringToUTF16(path)[0]),
+ access,
+ syscall.FILE_SHARE_READ|syscall.FILE_SHARE_WRITE|syscall.FILE_SHARE_DELETE,
+ nil,
+ syscall.OPEN_ALWAYS,
+ syscall.FILE_ATTRIBUTE_NORMAL,
+ 0)
+ if err != nil {
+ return nil, err
+ }
+ return os.NewFile(uintptr(fd), path), nil
+}
+
+func lockFile(fd syscall.Handle, flags uint32) error {
+ var flag uint32 = LOCKFILE_EXCLUSIVE_LOCK
+ flag |= flags
+ if fd == syscall.InvalidHandle {
+ return nil
+ }
+ err := lockFileEx(fd, flag, 1, 0, &syscall.Overlapped{})
+ if err == nil {
+ return nil
+ } else if err.Error() == errLocked.Error() {
+ return ErrLocked
+ } else if err != errLockViolation {
+ return err
+ }
+ return nil
+}
+
+func lockFileEx(h syscall.Handle, flags, locklow, lockhigh uint32, ol *syscall.Overlapped) (err error) {
+ var reserved uint32 = 0
+ r1, _, e1 := syscall.Syscall6(procLockFileEx.Addr(), 6, uintptr(h), uintptr(flags), uintptr(reserved), uintptr(locklow), uintptr(lockhigh), uintptr(unsafe.Pointer(ol)))
+ if r1 == 0 {
+ if e1 != 0 {
+ err = error(e1)
+ } else {
+ err = syscall.EINVAL
+ }
+ }
+ return err
+}