// Request.h

#ifndef USERLAND_FS_REQUEST_H
#define USERLAND_FS_REQUEST_H

#include <OS.h>

// address info flags
enum {
        ADDRESS_NOT_NULL        = 0x01,
        ADDRESS_IS_STRING       = 0x02,
};

namespace UserlandFSUtil {

class RequestAllocator;

// Address
class Address {
public:
                                                                Address();

                        void*                           GetData() const { return fRelocated; }
                        int32                           GetSize() const { return fSize; }

//private:
                        void                            SetTo(area_id area, int32 offset, int32 size);
                        void                            SetRelocatedAddress(void* address)
                                                                        { fRelocated = address; }

                        area_id                         GetArea() const { return fUnrelocated.area; }
                        int32                           GetOffset() const
                                                                        { return fUnrelocated.offset; }

private:
                        friend class RequestAllocator;

                        struct Unrelocated {
                                area_id                 area;
                                int32                   offset;
                        };

                        union {
                                Unrelocated             fUnrelocated;
                                void*                   fRelocated;
                        };
                        int32                           fSize;
};

// AddressInfo
struct AddressInfo {
        Address         *address;
        uint32          flags;
        int32           max_size;
};

// Request
class Request {
public:
                                                                Request(uint32 type);

                        uint32                          GetType() const;

                        status_t                        Check() const;
                        status_t                        GetAddressInfos(AddressInfo* infos,
                                                                        int32* count);

private:
                        uint32                          fType;
};

// implemented in Requests.cpp
bool is_kernel_request(uint32 type);
bool is_userland_request(uint32 type);

}       // namespace UserlandFSUtil

using UserlandFSUtil::Address;
using UserlandFSUtil::AddressInfo;
using UserlandFSUtil::Request;
using UserlandFSUtil::is_kernel_request;
using UserlandFSUtil::is_userland_request;

#endif  // USERLAND_FS_REQUEST_H