/*
 * Copyright 2007, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
 * Distributed under the terms of the MIT License.
 */
#ifndef PAGE_CACHE_LOCKER_H
#define PAGE_CACHE_LOCKER_H


#include <null.h>

struct vm_page;


class PageCacheLocker {
public:
        inline                                          PageCacheLocker(vm_page* page,
                                                                        bool dontWait = true);
        inline                                          ~PageCacheLocker();

                        bool                            IsLocked() { return fPage != NULL; }

                        bool                            Lock(vm_page* page, bool dontWait = true);
                        void                            Unlock();

private:
                        bool                            _IgnorePage(vm_page* page);

                        vm_page*                        fPage;
};


PageCacheLocker::PageCacheLocker(vm_page* page, bool dontWait)
        :
        fPage(NULL)
{
        Lock(page, dontWait);
}


PageCacheLocker::~PageCacheLocker()
{
        Unlock();
}


#endif  // PAGE_CACHE_LOCKER_H