-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* 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 <inttypes.h>
#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, int fd, int prot, unsigned context, bool keep_always, uint64_t offset, size_t size, struct stat *st, void **ret);
-void mmap_cache_close_fd(MMapCache *m, int fd);
-void mmap_cache_close_context(MMapCache *m, unsigned context);
+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);