AsidManager.h

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef MIPS_COMMON_ASIDMANAGER_H
#define MIPS_COMMON_ASIDMANAGER_H

#include "pedigree/kernel/process/Mutex.h"
#include "pedigree/kernel/processor/types.h"

#define NUM_ASID 256

class AsidManager
{
  public:
    typedef uint8_t Asid;

    static AsidManager &instance();

    Asid obtainAsid();
    void returnAsid(Asid asid);

    void bulldoze(Asid asid);

  private:
    AsidManager();
    ~AsidManager();

    uint32_t m_Asids[NUM_ASID];

    Mutex m_Mutex;

    static AsidManager m_Instance;
};
#endif