[mirror_frr.git] / lib / memory.h

/*
 * Copyright (c) 2015-16  David Lamparter, for NetDEF, Inc.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef _QUAGGA_MEMORY_H
#define _QUAGGA_MEMORY_H

#include <stdlib.h>
#include <stdio.h>
#include <frratomic.h>
#include "compiler.h"

#define array_size(ar) (sizeof(ar) / sizeof(ar[0]))

#if defined(HAVE_MALLOC_SIZE) && !defined(HAVE_MALLOC_USABLE_SIZE)
#define malloc_usable_size(x) malloc_size(x)
#define HAVE_MALLOC_USABLE_SIZE
#endif

#define SIZE_VAR ~0UL
struct memtype {
	struct memtype *next, **ref;
	const char *name;
	_Atomic size_t n_alloc;
	_Atomic size_t n_max;
	_Atomic size_t size;
#ifdef HAVE_MALLOC_USABLE_SIZE
	_Atomic size_t total;
	_Atomic size_t max_size;
#endif
};

struct memgroup {
	struct memgroup *next, **ref;
	struct memtype *types, **insert;
	const char *name;
};

/* macro usage:
 *
 *  mydaemon.h
 *    DECLARE_MGROUP(MYDAEMON)
 *    DECLARE_MTYPE(MYDAEMON_COMMON)
 *
 *  mydaemon.c
 *    DEFINE_MGROUP(MYDAEMON, "my daemon memory")
 *    DEFINE_MTYPE(MYDAEMON, MYDAEMON_COMMON,
 *                   "this mtype is used in multiple files in mydaemon")
 *    foo = qmalloc(MTYPE_MYDAEMON_COMMON, sizeof(*foo))
 *
 *  mydaemon_io.c
 *    bar = qmalloc(MTYPE_MYDAEMON_COMMON, sizeof(*bar))
 *
 *    DEFINE_MTYPE_STATIC(MYDAEMON, MYDAEMON_IO,
 *                          "this mtype is used only in this file")
 *    baz = qmalloc(MTYPE_MYDAEMON_IO, sizeof(*baz))
 *
 *  Note:  Naming conventions (MGROUP_ and MTYPE_ prefixes are enforced
 *         by not having these as part of the macro arguments)
 *  Note:  MTYPE_* are symbols to the compiler (of type struct memtype *),
 *         but MGROUP_* aren't.
 */

#define DECLARE_MGROUP(name) extern struct memgroup _mg_##name;
#define DEFINE_MGROUP(mname, desc)                                             \
	struct memgroup _mg_##mname                                            \
		__attribute__((section(".data.mgroups"))) = {                  \
			.name = desc,                                          \
			.types = NULL,                                         \
			.next = NULL,                                          \
			.insert = NULL,                                        \
			.ref = NULL,                                           \
	};                                                                     \
	static void _mginit_##mname(void) __attribute__((_CONSTRUCTOR(1000))); \
	static void _mginit_##mname(void)                                      \
	{                                                                      \
		extern struct memgroup **mg_insert;                            \
		_mg_##mname.ref = mg_insert;                                   \
		*mg_insert = &_mg_##mname;                                     \
		mg_insert = &_mg_##mname.next;                                 \
	}                                                                      \
	static void _mgfini_##mname(void) __attribute__((_DESTRUCTOR(1000)));  \
	static void _mgfini_##mname(void)                                      \
	{                                                                      \
		if (_mg_##mname.next)                                          \
			_mg_##mname.next->ref = _mg_##mname.ref;               \
		*_mg_##mname.ref = _mg_##mname.next;                           \
	}


#define DECLARE_MTYPE(name)                                                    \
	extern struct memtype _mt_##name;                                      \
	static struct memtype *const MTYPE_##name = &_mt_##name;

#define DEFINE_MTYPE_ATTR(group, mname, attr, desc)                            \
	attr struct memtype _mt_##mname                                        \
		__attribute__((section(".data.mtypes"))) = {                   \
			.name = desc,                                          \
			.next = NULL,                                          \
			.n_alloc = 0,                                          \
			.size = 0,                                             \
			.ref = NULL,                                           \
	};                                                                     \
	static void _mtinit_##mname(void) __attribute__((_CONSTRUCTOR(1001))); \
	static void _mtinit_##mname(void)                                      \
	{                                                                      \
		if (_mg_##group.insert == NULL)                                \
			_mg_##group.insert = &_mg_##group.types;               \
		_mt_##mname.ref = _mg_##group.insert;                          \
		*_mg_##group.insert = &_mt_##mname;                            \
		_mg_##group.insert = &_mt_##mname.next;                        \
	}                                                                      \
	static void _mtfini_##mname(void) __attribute__((_DESTRUCTOR(1001)));  \
	static void _mtfini_##mname(void)                                      \
	{                                                                      \
		if (_mt_##mname.next)                                          \
			_mt_##mname.next->ref = _mt_##mname.ref;               \
		*_mt_##mname.ref = _mt_##mname.next;                           \
	}

#define DEFINE_MTYPE(group, name, desc) DEFINE_MTYPE_ATTR(group, name, , desc)
#define DEFINE_MTYPE_STATIC(group, name, desc)                                 \
	DEFINE_MTYPE_ATTR(group, name, static, desc)                           \
	static struct memtype *const MTYPE_##name = &_mt_##name;

DECLARE_MGROUP(LIB)
DECLARE_MTYPE(TMP)
DECLARE_MTYPE(PREFIX_FLOWSPEC)


extern void *qmalloc(struct memtype *mt, size_t size)
	__attribute__((malloc, _ALLOC_SIZE(2), nonnull(1) _RET_NONNULL));
extern void *qcalloc(struct memtype *mt, size_t size)
	__attribute__((malloc, _ALLOC_SIZE(2), nonnull(1) _RET_NONNULL));
extern void *qrealloc(struct memtype *mt, void *ptr, size_t size)
	__attribute__((_ALLOC_SIZE(3), nonnull(1) _RET_NONNULL));
extern void *qstrdup(struct memtype *mt, const char *str)
	__attribute__((malloc, nonnull(1) _RET_NONNULL));
extern void qfree(struct memtype *mt, void *ptr) __attribute__((nonnull(1)));

#define XMALLOC(mtype, size)		qmalloc(mtype, size)
#define XCALLOC(mtype, size)		qcalloc(mtype, size)
#define XREALLOC(mtype, ptr, size)	qrealloc(mtype, ptr, size)
#define XSTRDUP(mtype, str)		qstrdup(mtype, str)
#define XFREE(mtype, ptr)                                                      \
	do {                                                                   \
		qfree(mtype, ptr);                                             \
		ptr = NULL;                                                    \
	} while (0)

static inline size_t mtype_stats_alloc(struct memtype *mt)
{
	return mt->n_alloc;
}

/* NB: calls are ordered by memgroup; and there is a call with mt == NULL for
 * each memgroup (so that a header can be printed, and empty memgroups show)
 *
 * return value: 0: continue, !0: abort walk.  qmem_walk will return the
 * last value from qmem_walk_fn. */
typedef int qmem_walk_fn(void *arg, struct memgroup *mg, struct memtype *mt);
extern int qmem_walk(qmem_walk_fn *func, void *arg);
extern int log_memstats(FILE *fp, const char *);
#define log_memstats_stderr(prefix) log_memstats(stderr, prefix)

extern void memory_oom(size_t size, const char *name);

#endif /* _QUAGGA_MEMORY_H */
Commit	Line	Data
3b4cd783 DL	1	/*
	2	* Copyright (c) 2015-16 David Lamparter, for NetDEF, Inc.
	3	*
db2d8df6 DL	4	* Permission to use, copy, modify, and distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
3b4cd783	7	*
db2d8df6 DL	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	11	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	14	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
3b4cd783 DL	15	*/
	16
	17	#ifndef _QUAGGA_MEMORY_H
	18	#define _QUAGGA_MEMORY_H
	19
	20	#include <stdlib.h>
9eed278b	21	#include <stdio.h>
a31446a8	22	#include <frratomic.h>
de1a880c	23	#include "compiler.h"
3b4cd783 DL	24
	25	#define array_size(ar) (sizeof(ar) / sizeof(ar[0]))
	26
602a6584 DL	27	#if defined(HAVE_MALLOC_SIZE) && !defined(HAVE_MALLOC_USABLE_SIZE)
	28	#define malloc_usable_size(x) malloc_size(x)
	29	#define HAVE_MALLOC_USABLE_SIZE
	30	#endif
	31
3b4cd783	32	#define SIZE_VAR ~0UL
fa7fe831 DL	33	struct memtype {
	34	struct memtype next, *ref;
	35	const char *name;
	36	_Atomic size_t n_alloc;
13f1ba41	37	_Atomic size_t n_max;
fa7fe831	38	_Atomic size_t size;
602a6584 DL	39	#ifdef HAVE_MALLOC_USABLE_SIZE
602a6584 DL	40	_Atomic size_t total;
13f1ba41	41	_Atomic size_t max_size;
602a6584	42	#endif
3b4cd783 DL	43	};
3b4cd783 DL	44
fa7fe831 DL	45	struct memgroup {
	46	struct memgroup next, *ref;
	47	struct memtype types, *insert;
	48	const char *name;
3b4cd783 DL	49	};
3b4cd783 DL	50
3b4cd783 DL	51	/* macro usage:
	52	*
	53	* mydaemon.h
	54	* DECLARE_MGROUP(MYDAEMON)
	55	* DECLARE_MTYPE(MYDAEMON_COMMON)
	56	*
	57	* mydaemon.c
	58	* DEFINE_MGROUP(MYDAEMON, "my daemon memory")
	59	* DEFINE_MTYPE(MYDAEMON, MYDAEMON_COMMON,
	60	* "this mtype is used in multiple files in mydaemon")
fa7fe831	61	* foo = qmalloc(MTYPE_MYDAEMON_COMMON, sizeof(*foo))
3b4cd783 DL	62	*
3b4cd783 DL	63	* mydaemon_io.c
fa7fe831	64	* bar = qmalloc(MTYPE_MYDAEMON_COMMON, sizeof(*bar))
3b4cd783 DL	65	*
	66	* DEFINE_MTYPE_STATIC(MYDAEMON, MYDAEMON_IO,
	67	* "this mtype is used only in this file")
fa7fe831	68	* baz = qmalloc(MTYPE_MYDAEMON_IO, sizeof(*baz))
3b4cd783 DL	69	*
	70	* Note: Naming conventions (MGROUP_ and MTYPE_ prefixes are enforced
	71	* by not having these as part of the macro arguments)
	72	* Note: MTYPE_* are symbols to the compiler (of type struct memtype *),
	73	* but MGROUP_* aren't.
	74	*/
	75
d62a17ae	76	#define DECLARE_MGROUP(name) extern struct memgroup _mg_##name;
	77	#define DEFINE_MGROUP(mname, desc) \
	78	struct memgroup _mg_##mname \
	79	__attribute__((section(".data.mgroups"))) = { \
	80	.name = desc, \
	81	.types = NULL, \
	82	.next = NULL, \
	83	.insert = NULL, \
	84	.ref = NULL, \
	85	}; \
	86	static void _mginit_##mname(void) __attribute__((_CONSTRUCTOR(1000))); \
	87	static void _mginit_##mname(void) \
	88	{ \
	89	extern struct memgroup **mg_insert; \
	90	_mg_##mname.ref = mg_insert; \
	91	*mg_insert = &_mg_##mname; \
	92	mg_insert = &_mg_##mname.next; \
	93	} \
	94	static void _mgfini_##mname(void) __attribute__((_DESTRUCTOR(1000))); \
	95	static void _mgfini_##mname(void) \
	96	{ \
	97	if (_mg_##mname.next) \
	98	_mg_##mname.next->ref = _mg_##mname.ref; \
	99	*_mg_##mname.ref = _mg_##mname.next; \
	100	}
	101
	102
	103	#define DECLARE_MTYPE(name) \
	104	extern struct memtype _mt_##name; \
	105	static struct memtype *const MTYPE_##name = &_mt_##name;
	106
	107	#define DEFINE_MTYPE_ATTR(group, mname, attr, desc) \
	108	attr struct memtype _mt_##mname \
	109	__attribute__((section(".data.mtypes"))) = { \
	110	.name = desc, \
	111	.next = NULL, \
	112	.n_alloc = 0, \
	113	.size = 0, \
	114	.ref = NULL, \
	115	}; \
	116	static void _mtinit_##mname(void) __attribute__((_CONSTRUCTOR(1001))); \
	117	static void _mtinit_##mname(void) \
	118	{ \
	119	if (_mg_##group.insert == NULL) \
	120	_mg_##group.insert = &_mg_##group.types; \
	121	_mt_##mname.ref = _mg_##group.insert; \
	122	*_mg_##group.insert = &_mt_##mname; \
	123	_mg_##group.insert = &_mt_##mname.next; \
	124	} \
	125	static void _mtfini_##mname(void) __attribute__((_DESTRUCTOR(1001))); \
	126	static void _mtfini_##mname(void) \
	127	{ \
	128	if (_mt_##mname.next) \
	129	_mt_##mname.next->ref = _mt_##mname.ref; \
	130	*_mt_##mname.ref = _mt_##mname.next; \
	131	}
	132
	133	#define DEFINE_MTYPE(group, name, desc) DEFINE_MTYPE_ATTR(group, name, , desc)
	134	#define DEFINE_MTYPE_STATIC(group, name, desc) \
	135	DEFINE_MTYPE_ATTR(group, name, static, desc) \
	136	static struct memtype *const MTYPE_##name = &_mt_##name;
3b4cd783	137
4a1ab8e4 DL	138	DECLARE_MGROUP(LIB)
4a1ab8e4 DL	139	DECLARE_MTYPE(TMP)
9a14899b	140	DECLARE_MTYPE(PREFIX_FLOWSPEC)
4a1ab8e4	141
3b4cd783	142
fa7fe831	143	extern void qmalloc(struct memtype mt, size_t size)
d62a17ae	144	__attribute__((malloc, _ALLOC_SIZE(2), nonnull(1) _RET_NONNULL));
fa7fe831	145	extern void qcalloc(struct memtype mt, size_t size)
d62a17ae	146	__attribute__((malloc, _ALLOC_SIZE(2), nonnull(1) _RET_NONNULL));
fa7fe831	147	extern void qrealloc(struct memtype mt, void *ptr, size_t size)
d62a17ae	148	__attribute__((_ALLOC_SIZE(3), nonnull(1) _RET_NONNULL));
	149	extern void qstrdup(struct memtype mt, const char *str)
	150	__attribute__((malloc, nonnull(1) _RET_NONNULL));
	151	extern void qfree(struct memtype mt, void ptr) __attribute__((nonnull(1)));
3b4cd783	152
3b4cd783 DL	153	#define XMALLOC(mtype, size) qmalloc(mtype, size)
	154	#define XCALLOC(mtype, size) qcalloc(mtype, size)
	155	#define XREALLOC(mtype, ptr, size) qrealloc(mtype, ptr, size)
	156	#define XSTRDUP(mtype, str) qstrdup(mtype, str)
d62a17ae	157	#define XFREE(mtype, ptr) \
	158	do { \
	159	qfree(mtype, ptr); \
	160	ptr = NULL; \
	161	} while (0)
3b4cd783 DL	162
	163	static inline size_t mtype_stats_alloc(struct memtype *mt)
	164	{
	165	return mt->n_alloc;
	166	}
3b4cd783 DL	167
	168	/* NB: calls are ordered by memgroup; and there is a call with mt == NULL for
	169	* each memgroup (so that a header can be printed, and empty memgroups show)
	170	*
	171	* return value: 0: continue, !0: abort walk. qmem_walk will return the
	172	* last value from qmem_walk_fn. */
fa7fe831 DL	173	typedef int qmem_walk_fn(void arg, struct memgroup mg, struct memtype *mt);
fa7fe831 DL	174	extern int qmem_walk(qmem_walk_fn func, void arg);
9eed278b DL	175	extern int log_memstats(FILE fp, const char );
9eed278b DL	176	#define log_memstats_stderr(prefix) log_memstats(stderr, prefix)
3b4cd783	177
fa7fe831	178	extern void memory_oom(size_t size, const char *name);
3b4cd783 DL	179
3b4cd783 DL	180	#endif /* _QUAGGA_MEMORY_H */