tree-wide: drop 'This file is part of systemd' blurb

[thirdparty/systemd.git] / src / journal / mmap-cache.h

diff --git a/src/journal/mmap-cache.h b/src/journal/mmap-cache.h
index de34634080405859cab6384629dab9d519f3efda..90b9888c242dd15fa46974d0f3e4ccedabddd7ee 100644 (file)
--- a/src/journal/mmap-cache.h
+++ b/src/journal/mmap-cache.h
@@ -1,36 +1,38 @@
-/*-*- 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, uint64_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);