45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
#pragma once
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "sd-bus.h"
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#define MEMFD_CACHE_MAX 32
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/* When we cache a memfd block for reuse, we will truncate blocks
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* longer than this in order not to keep too much data around. */
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#define MEMFD_CACHE_ITEM_SIZE_MAX (128*1024)
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/* This determines at which minimum size we prefer sending memfds over
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* sending vectors */
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#define MEMFD_MIN_SIZE (512*1024)
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struct memfd_cache {
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int fd;
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void *address;
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size_t mapped;
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size_t allocated;
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};
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void close_and_munmap(int fd, void *address, size_t size);
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void bus_flush_memfd(sd_bus *bus);
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uint64_t attach_flags_to_kdbus(uint64_t sd_bus_flags);
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