upload android base code part6

android/system/vold/Loop.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef _LOOP_H
+#define _LOOP_H
+
+#include <string>
+#include <unistd.h>
+#include <linux/loop.h>
+
+class SocketClient;
+
+class Loop {
+public:
+    static const int LOOP_MAX = 4096;
+public:
+    static int lookupActive(const char *id, char *buffer, size_t len);
+    static int lookupInfo(const char *loopDevice, struct asec_superblock *sb, unsigned long *nr_sec);
+    static int create(const char *id, const char *loopFile, char *loopDeviceBuffer, size_t len);
+    static int create(const std::string& file, std::string& out_device);
+    static int destroyByDevice(const char *loopDevice);
+    static int destroyByFile(const char *loopFile);
+    static int createImageFile(const char *file, unsigned long numSectors);
+    static int resizeImageFile(const char *file, unsigned long numSectors);
+
+    static int dumpState(SocketClient *c);
+};
+
+#endif