summaryrefslogtreecommitdiff
path: root/src/libsystemd/sd-bus/bus-kernel.h
blob: 44c9a76311e702dbc35f357271ee88991a008736 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once

/***
***/

#include "sd-bus.h"

#define MEMFD_CACHE_MAX 32

/* When we cache a memfd block for reuse, we will truncate blocks
 * longer than this in order not to keep too much data around. */
#define MEMFD_CACHE_ITEM_SIZE_MAX (128*1024)

/* This determines at which minimum size we prefer sending memfds over
 * sending vectors */
#define MEMFD_MIN_SIZE (512*1024)

struct memfd_cache {
        int fd;
        void *address;
        size_t mapped;
        size_t allocated;
};

void close_and_munmap(int fd, void *address, size_t size);
void bus_flush_memfd(sd_bus *bus);