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/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
/***
This file is part of systemd.
Copyright 2012 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <stdbool.h>
#include <sys/stat.h>
/* One context per object type, plus one of the header, plus one "additional" one */
#define MMAP_CACHE_MAX_CONTEXTS 9
typedef struct MMapCache MMapCache;
typedef struct MMapFileDescriptor MMapFileDescriptor;
MMapCache* mmap_cache_new(void);
MMapCache* mmap_cache_ref(MMapCache *m);
MMapCache* mmap_cache_unref(MMapCache *m);
int mmap_cache_get(
MMapCache *m,
MMapFileDescriptor *f,
int prot,
unsigned context,
bool keep_always,
uint64_t offset,
size_t size,
struct stat *st,
void **ret,
size_t *ret_size);
MMapFileDescriptor * mmap_cache_add_fd(MMapCache *m, int fd);
void mmap_cache_free_fd(MMapCache *m, MMapFileDescriptor *f);
unsigned mmap_cache_get_hit(MMapCache *m);
unsigned mmap_cache_get_missed(MMapCache *m);
bool mmap_cache_got_sigbus(MMapCache *m, MMapFileDescriptor *f);
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