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sortix--sortix/sortix/device.h
Jonas 'Sortie' Termansen 1026354e98 Sortix now uses the Device class.
This class is very WIP and is just experimental.
2011-08-08 15:20:08 +02:00

90 lines
2.2 KiB
C++

/******************************************************************************
COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
This file is part of Sortix.
Sortix is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License along
with Sortix. If not, see <http://www.gnu.org/licenses/>.
device.h
A base class for all devices.
******************************************************************************/
#ifndef SORTIX_DEVICE_H
#define SORTIX_DEVICE_H
namespace Sortix
{
class User;
class Device
{
public:
// Flags
static const nat READABLE = (1<<0);
static const nat WRITABLE = (1<<1);
static const nat SEEKABLE = (1<<2);
static const nat SIZEABLE = (1<<3);
static const nat BLOCK = (1<<4);
static const nat FLAGMASK = ((1<<5)-1);
// Types
static const nat TYPEMASK = ~FLAGMASK;
static const nat STREAM = (1<<5);
static const nat BUFFER = (2<<5);
static const nat DIRECTORY = (3<<5);
static const nat FILESYSTEM = (4<<5);
static const nat NETWORK = (5<<5);
static const nat SOUND = (6<<5);
static const nat GRAPHICS = (7<<5);
static const nat MOUSE = (8<<5);
static const nat KEYBOARD = (9<<5);
static const nat PRINTER = (10<<5);
static const nat SCANNER = (11<<5);
static const nat VGABUFFER = (12<<5);
static const nat OTHER = TYPEMASK;
public:
volatile size_t _refCount;
public:
Device() { _refCount = 1; }
virtual ~Device() { }
private:
User* _owner;
public:
bool IsOwner(User* candidate) { return candidate == _owner; }
public:
bool Close();
void RequestThink();
protected:
virtual void Think();
public:
virtual bool Sync();
virtual nat Flags() = 0;
public:
bool IsType(nat type) { return (Flags() & TYPEMASK) == type; }
};
}
#endif