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-rw-r--r--src/libsystemd/libsystemd-journal-internal/mmap-cache.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/src/libsystemd/libsystemd-journal-internal/mmap-cache.h b/src/libsystemd/libsystemd-journal-internal/mmap-cache.h
new file mode 100644
index 0000000000..199d944647
--- /dev/null
+++ b/src/libsystemd/libsystemd-journal-internal/mmap-cache.h
@@ -0,0 +1,49 @@
+#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;
+
+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);
+
+unsigned mmap_cache_get_hit(MMapCache *m);
+unsigned mmap_cache_get_missed(MMapCache *m);
+
+bool mmap_cache_got_sigbus(MMapCache *m, int fd);