text: /*
   * Copyright 2015-2017, Intel Corporation
   * Copyright (c) 2016, Microsoft Corporation. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *     * Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *
   *     * Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in
   *       the documentation and/or other materials provided with the
   *       distribution.
   *
   *     * Neither the name of the copyright holder nor the names of its
   *       contributors may be used to endorse or promote products derived
   *       from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  /*
   * win_mmap.h -- (internal) tracks the regions mapped by mmap
   */
  
  #ifndef WIN_MMAP_H
  #define WIN_MMAP_H 1
  
  #include "queue.h"
  
  #define roundup(x, y)	((((x) + ((y) - 1)) / (y)) * (y))
  #define rounddown(x, y)	(((x) / (y)) * (y))
  
  /* allocation/mmap granularity */
  extern unsigned long long Mmap_align;
  
  typedef enum FILE_MAPPING_TRACKER_FLAGS {
  	FILE_MAPPING_TRACKER_FLAG_DIRECT_MAPPED = 0x0001,
  
  	/*
  	 * This should hold the value of all flags ORed for debug purpose.
  	 */
  	FILE_MAPPING_TRACKER_FLAGS_MASK =
  		FILE_MAPPING_TRACKER_FLAG_DIRECT_MAPPED
  } FILE_MAPPING_TRACKER_FLAGS;
  
  /*
   * this structure tracks the file mappings outstanding per file handle
   */
  typedef struct FILE_MAPPING_TRACKER {
  	SORTEDQ_ENTRY(FILE_MAPPING_TRACKER) ListEntry;
  	HANDLE FileHandle;
  	HANDLE FileMappingHandle;
  	void *BaseAddress;
  	void *EndAddress;
  	DWORD Access;
  	os_off_t Offset;
  	size_t FileLen;
  	FILE_MAPPING_TRACKER_FLAGS Flags;
  } FILE_MAPPING_TRACKER, *PFILE_MAPPING_TRACKER;
  
  extern SRWLOCK FileMappingQLock;
  extern SORTEDQ_HEAD(FMLHead, FILE_MAPPING_TRACKER) FileMappingQHead;
  
  #endif /* WIN_MMAP_H */
  