/*
 * Copyright 2003, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
 * Distributed under the terms of the MIT License.
 */
#ifndef HANDLE_H
#define HANDLE_H


#include <boot/vfs.h>


#ifdef __cplusplus

class Handle : public Node {
        public:
                Handle(int handle);
                Handle();
                virtual ~Handle();

                void SetHandle(int handle);

                virtual ssize_t ReadAt(void *cookie, off_t pos, void *buffer, size_t bufferSize);
                virtual ssize_t WriteAt(void *cookie, off_t pos, const void *buffer, size_t bufferSize);

                virtual off_t Size() const;

        protected:
                int             fHandle;
};

/* character devices */
class CharHandle : public Handle {
        public:
                CharHandle(int handle);
                CharHandle();
                virtual ~CharHandle();

                virtual ssize_t ReadAt(void *cookie, off_t pos, void *buffer, size_t bufferSize);
                virtual ssize_t WriteAt(void *cookie, off_t pos, const void *buffer, size_t bufferSize);

        protected:
};

/* block devices */
/* cf. devices.cpp */

class ExecDevice : public Node {
        public:
                ExecDevice(struct IORequest *ioRequest);
                ExecDevice(size_t requestSize);
                ExecDevice();
                virtual ~ExecDevice();

                status_t        AllocRequest(size_t requestSize);

                status_t        Open(const char *name, unsigned long unit = 0,
                        unsigned long flags = 0);

                virtual ssize_t ReadAt(void *cookie, off_t pos, void *buffer, size_t bufferSize);
                virtual ssize_t WriteAt(void *cookie, off_t pos, const void *buffer, size_t bufferSize);

                virtual off_t Size() const;

                struct IORequest        *Request() const { return fIORequest; };
                struct IOStdReq         *StdRequest() const { return fIOStdReq; };

                // *IO() call helpers
                status_t        Do(void);
                status_t        Clear(void);

        protected:
                struct IORequest        *fIORequest;
                struct IOStdReq *fIOStdReq;
};


#endif  /* __cplusplus */

#endif  /* HANDLE_H */