* Copyright 2008-2010, Axel Dörfler, axeld@pinc-software.de.
* All rights reserved. Distributed under the terms of the MIT License.
*/
#ifndef DEVICEOPENER_H
#define DEVICEOPENER_H
#ifdef FS_SHELL
# include "fssh_api_wrapper.h"
#else
# include <fcntl.h>
# include <sys/types.h>
# include <SupportDefs.h>
#endif
class DeviceOpener {
public:
DeviceOpener(int fd, int mode);
DeviceOpener(const char* device, int mode);
~DeviceOpener();
int Open(const char* device, int mode);
int Open(int fd, int mode);
void* InitCache(off_t numBlocks, uint32 blockSize);
void RemoveCache(bool allowWrites);
void Keep();
int Device() const { return fDevice; }
int Mode() const { return fMode; }
bool IsReadOnly() const {
return _IsReadOnly(fMode); }
status_t GetSize(off_t* _size,
uint32* _blockSize = NULL);
private:
static bool _IsReadOnly(int mode)
{ return (mode & O_RWMASK) == O_RDONLY; }
static bool _IsReadWrite(int mode)
{ return (mode & O_RWMASK) == O_RDWR; }
int fDevice;
int fMode;
void* fBlockCache;
};
#endif
