add vendor

vendor/github.com/siddontang/go/filelock/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2011 The LevelDB-Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/siddontang/go/filelock/file_lock_generic.go

@@ -0,0 +1,17 @@
+// Copyright 2012 The LevelDB-Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows
+
+package filelock
+
+import (
+	"fmt"
+	"io"
+	"runtime"
+)
+
+func Lock(name string) (io.Closer, error) {
+	return nil, fmt.Errorf("leveldb/db: file locking is not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
+}

vendor/github.com/siddontang/go/filelock/file_lock_solaris.go

@@ -0,0 +1,43 @@
+// Copyright 2014 The LevelDB-Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build solaris
+
+package filelock
+
+import (
+	"io"
+	"os"
+	"syscall"
+)
+
+// lockCloser hides all of an os.File's methods, except for Close.
+type lockCloser struct {
+	f *os.File
+}
+
+func (l lockCloser) Close() error {
+	return l.f.Close()
+}
+
+func Lock(name string) (io.Closer, error) {
+	f, err := os.Create(name)
+	if err != nil {
+		return nil, err
+	}
+
+	spec := syscall.Flock_t{
+		Type:   syscall.F_WRLCK,
+		Whence: int16(os.SEEK_SET),
+		Start:  0,
+		Len:    0, // 0 means to lock the entire file.
+		Pid:    int32(os.Getpid()),
+	}
+	if err := syscall.FcntlFlock(f.Fd(), syscall.F_SETLK, &spec); err != nil {
+		f.Close()
+		return nil, err
+	}
+
+	return lockCloser{f}, nil
+}

vendor/github.com/siddontang/go/filelock/file_lock_unix.go

@@ -0,0 +1,51 @@
+// Copyright 2014 The LevelDB-Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd
+
+package filelock
+
+import (
+	"io"
+	"os"
+	"syscall"
+)
+
+// lockCloser hides all of an os.File's methods, except for Close.
+type lockCloser struct {
+	f *os.File
+}
+
+func (l lockCloser) Close() error {
+	return l.f.Close()
+}
+
+func Lock(name string) (io.Closer, error) {
+	f, err := os.Create(name)
+	if err != nil {
+		return nil, err
+	}
+
+	/*
+		Some people tell me FcntlFlock does not exist, so use flock here
+	*/
+	if err := syscall.Flock(int(f.Fd()), syscall.LOCK_EX|syscall.LOCK_NB); err != nil {
+		f.Close()
+		return nil, err
+	}
+
+	// spec := syscall.Flock_t{
+	// 	Type:   syscall.F_WRLCK,
+	// 	Whence: int16(os.SEEK_SET),
+	// 	Start:  0,
+	// 	Len:    0, // 0 means to lock the entire file.
+	// 	Pid:    int32(os.Getpid()),
+	// }
+	// if err := syscall.FcntlFlock(f.Fd(), syscall.F_SETLK, &spec); err != nil {
+	// 	f.Close()
+	// 	return nil, err
+	// }
+
+	return lockCloser{f}, nil
+}

vendor/github.com/siddontang/go/filelock/file_lock_windows.go

@@ -0,0 +1,36 @@
+// Copyright 2013 The LevelDB-Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package filelock
+
+import (
+	"io"
+	"syscall"
+)
+
+// lockCloser hides all of an syscall.Handle's methods, except for Close.
+type lockCloser struct {
+	fd syscall.Handle
+}
+
+func (l lockCloser) Close() error {
+	return syscall.Close(l.fd)
+}
+
+func Lock(name string) (io.Closer, error) {
+	p, err := syscall.UTF16PtrFromString(name)
+	if err != nil {
+		return nil, err
+	}
+	fd, err := syscall.CreateFile(p,
+		syscall.GENERIC_READ|syscall.GENERIC_WRITE,
+		0, nil, syscall.CREATE_ALWAYS,
+		syscall.FILE_ATTRIBUTE_NORMAL,
+		0,
+	)
+	if err != nil {
+		return nil, err
+	}
+	return lockCloser{fd: fd}, nil
+}