/*
* \brief Capability IDs allocation service
* \author Stefan Kalkowski
* \date 2012-02-22
*/
/*
* Copyright (C) 2012-2017 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU Affero General Public License version 3.
*/
#ifndef _CORE__INCLUDE__CAP_ID_ALLOC_H_
#define _CORE__INCLUDE__CAP_ID_ALLOC_H_
/* Genode includes */
#include
#include
#include
#include
namespace Genode {
class Cap_id_allocator
{
private:
enum {
CAP_ID_RANGE = ~0UL,
CAP_ID_MASK = ~3UL,
CAP_ID_NUM_MAX = CAP_ID_MASK >> 2,
CAP_ID_OFFSET = 1 << 2
};
Synced_range_allocator _id_alloc;
Mutex _mutex { };
public:
class Out_of_ids : Exception {};
Cap_id_allocator(Allocator &);
unsigned long alloc();
void free(unsigned long id);
};
}
#endif /* _CORE__INCLUDE__CAP_ID_ALLOC_H_ */