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/* Copyright (c) 2003-2004, Roger Dingledine
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2019, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file mmap.h
*
* \brief Header for mmap.c
**/
#ifndef TOR_MMAP_H
#define TOR_MMAP_H
#include "lib/cc/compat_compiler.h"
#include <stddef.h>
#ifdef _WIN32
#include <windef.h>
#endif
/** Represents an mmaped file. Allocated via tor_mmap_file; freed with
* tor_munmap_file. */
typedef struct tor_mmap_t {
const char *data; /**< Mapping of the file's contents. */
size_t size; /**< Size of the file. */
/* None of the fields below should be accessed from outside compat.c */
#ifdef HAVE_MMAP
size_t mapping_size; /**< Size of the actual mapping. (This is this file
* size, rounded up to the nearest page.) */
#elif defined _WIN32
HANDLE mmap_handle;
#endif /* defined(HAVE_MMAP) || ... */
} tor_mmap_t;
tor_mmap_t *tor_mmap_file(const char *filename);
int tor_munmap_file(tor_mmap_t *handle);
#endif
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