Loop.h revision b78a32c1d5eeb243bdac0eaf18effb1897f1ee67 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef _LOOP_H
18#define _LOOP_H
19
20#include <unistd.h>
21#include <linux/loop.h>
22
23class Loop {
24public:
25    static const int LOOP_MAX = 4096;
26public:
27    static int lookupActive(const char *loopFile, char *buffer, size_t len);
28    static int create(const char *loopFile, char *loopDeviceBuffer, size_t len);
29    static int destroyByDevice(const char *loopDevice);
30    static int destroyByFile(const char *loopFile);
31    static int createImageFile(const char *file, size_t sizeMb);
32};
33
34#endif
35