From 16e9f408fa9a9626059bdd6c89dc175e06b9e976 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Tue, 14 Aug 2012 22:02:24 +0200 Subject: journal: implement generic sharable mmap caching logic instead of having one simple per-file cache implement an more comprehensive one that works for multiple files and can actually maintain multiple maps per file and per object type. --- src/journal/mmap-cache.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 src/journal/mmap-cache.h (limited to 'src/journal/mmap-cache.h') diff --git a/src/journal/mmap-cache.h b/src/journal/mmap-cache.h new file mode 100644 index 0000000000..0a88fc584f --- /dev/null +++ b/src/journal/mmap-cache.h @@ -0,0 +1,34 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +#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 . +***/ + +#include + +typedef struct MMapCache MMapCache; + +MMapCache* mmap_cache_new(unsigned contexts_max, unsigned fds_max); +MMapCache* mmap_cache_ref(MMapCache *m); +MMapCache* mmap_cache_unref(MMapCache *m); + +int mmap_cache_get(MMapCache *m, int fd, int prot, unsigned context, uint64_t offset, uint64_t size, void **ret); +void mmap_cache_close_fd(MMapCache *m, int fd); +void mmap_cache_close_context(MMapCache *m, unsigned context); -- cgit v1.2.3-54-g00ecf