[thirdparty/systemd.git] / src / libsystemd / sd-bus / bus-kernel.h

/* 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);
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
6629161f LP	2	#pragma once
6629161f LP	3
6629161f LP	4	#include "sd-bus.h"
6629161f LP	5
bc7fd8cd	6	#define MEMFD_CACHE_MAX 32
66b26c5c LP	7
	8	/* When we cache a memfd block for reuse, we will truncate blocks
	9	* longer than this in order not to keep too much data around. */
832d16a6	10	#define MEMFD_CACHE_ITEM_SIZE_MAX (128*1024)
66b26c5c LP	11
	12	/* This determines at which minimum size we prefer sending memfds over
	13	* sending vectors */
1fa13293	14	#define MEMFD_MIN_SIZE (512*1024)
bc7fd8cd LP	15
	16	struct memfd_cache {
	17	int fd;
	18	void *address;
8e959fbf LP	19	size_t mapped;
8e959fbf LP	20	size_t allocated;
bc7fd8cd LP	21	};
bc7fd8cd LP	22
a132bef0 ZJS	23	void close_and_munmap(int fd, void *address, size_t size);
a132bef0 ZJS	24	void bus_flush_memfd(sd_bus *bus);