VsidManager.cc

/*
 * 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.
 */

#include "VsidManager.h"
#include "pedigree/kernel/Log.h"

VsidManager VsidManager::m_Instance;

VsidManager &VsidManager::instance()
{
    return m_Instance;
}

VsidManager::VsidManager() : m_HighWaterMark(2), m_pStack(0), m_Mutex()
{
}

VsidManager::~VsidManager()
{
}

VsidManager::Vsid VsidManager::obtainVsid()
{
    NOTICE("pStack: " << (uintptr_t) m_pStack << ", hwm: " << m_HighWaterMark);

    // Is the stack NULL?
    //  if (m_pStack == 0)
    // Return the high water mark and increment.
    return m_HighWaterMark++;

    // Pop the stack.
    //  VsidStack *pPopped = m_pStack;
    //  m_pStack = m_pStack->next;

    //  Vsid vsid = pPopped->vsid;
    //  delete pPopped;

    //  return vsid;
}

void VsidManager::returnVsid(VsidManager::Vsid vsid)
{

    //  VsidStack *pPushed = new VsidStack;
    //  pPushed->vsid = vsid;
    //  pPushed->next = m_pStack;
    //  m_pStack = pPushed;
}