/*===- PageManager.h - Allocates memory on page boundaries ------*- C++ -*-===*/
/* 
//                     The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
// 
//===----------------------------------------------------------------------===//
//
// This file defines the interface used by the pool allocator to allocate memory
// on large alignment boundaries.
//
//===----------------------------------------------------------------------===*/

#ifndef PAGEMANAGER_H
#define PAGEMANAGER_H

/* InitializePageManager - This function must be called before any other page
// manager accesses are performed.  It may be called multiple times.
*/ 
void InitializePageManager();

/* PageSize - Contains the size of the unit of memory allocated by
// AllocatePage.  This is a value that is typically several kilobytes in size,
// and is guaranteed to be a power of two.
*/
extern unsigned PageSize;

/* AllocatePage - This function returns a chunk of memory with size and
// alignment specified by getPageSize().
*/
void *AllocatePage();
void *RemapPage(void *va);

/* AllocateNPages - */ 
void *AllocateNPages(unsigned Num);

void MprotectPage(void *Page, unsigned NumPages);

/* FreePage - This function returns the specified page to the pagemanager for
/// future allocation.
*/
void FreePage(void *Page);

#endif