[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]))

#define SIZE_VAR ~0UL
struct memtype {
	struct memtype *next, **ref;
	const char *name;
	_Atomic size_t n_alloc;
	_Atomic size_t size;
};

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
	27	#define SIZE_VAR ~0UL
fa7fe831 DL	28	struct memtype {
	29	struct memtype next, *ref;
	30	const char *name;
	31	_Atomic size_t n_alloc;
	32	_Atomic size_t size;
3b4cd783 DL	33	};
3b4cd783 DL	34
fa7fe831 DL	35	struct memgroup {
	36	struct memgroup next, *ref;
	37	struct memtype types, *insert;
	38	const char *name;
3b4cd783 DL	39	};
3b4cd783 DL	40
3b4cd783 DL	41	/* macro usage:
	42	*
	43	* mydaemon.h
	44	* DECLARE_MGROUP(MYDAEMON)
	45	* DECLARE_MTYPE(MYDAEMON_COMMON)
	46	*
	47	* mydaemon.c
	48	* DEFINE_MGROUP(MYDAEMON, "my daemon memory")
	49	* DEFINE_MTYPE(MYDAEMON, MYDAEMON_COMMON,
	50	* "this mtype is used in multiple files in mydaemon")
fa7fe831	51	* foo = qmalloc(MTYPE_MYDAEMON_COMMON, sizeof(*foo))
3b4cd783 DL	52	*
3b4cd783 DL	53	* mydaemon_io.c
fa7fe831	54	* bar = qmalloc(MTYPE_MYDAEMON_COMMON, sizeof(*bar))
3b4cd783 DL	55	*
	56	* DEFINE_MTYPE_STATIC(MYDAEMON, MYDAEMON_IO,
	57	* "this mtype is used only in this file")
fa7fe831	58	* baz = qmalloc(MTYPE_MYDAEMON_IO, sizeof(*baz))
3b4cd783 DL	59	*
	60	* Note: Naming conventions (MGROUP_ and MTYPE_ prefixes are enforced
	61	* by not having these as part of the macro arguments)
	62	* Note: MTYPE_* are symbols to the compiler (of type struct memtype *),
	63	* but MGROUP_* aren't.
	64	*/
	65
d62a17ae	66	#define DECLARE_MGROUP(name) extern struct memgroup _mg_##name;
	67	#define DEFINE_MGROUP(mname, desc) \
	68	struct memgroup _mg_##mname \
	69	__attribute__((section(".data.mgroups"))) = { \
	70	.name = desc, \
	71	.types = NULL, \
	72	.next = NULL, \
	73	.insert = NULL, \
	74	.ref = NULL, \
	75	}; \
	76	static void _mginit_##mname(void) __attribute__((_CONSTRUCTOR(1000))); \
	77	static void _mginit_##mname(void) \
	78	{ \
	79	extern struct memgroup **mg_insert; \
	80	_mg_##mname.ref = mg_insert; \
	81	*mg_insert = &_mg_##mname; \
	82	mg_insert = &_mg_##mname.next; \
	83	} \
	84	static void _mgfini_##mname(void) __attribute__((_DESTRUCTOR(1000))); \
	85	static void _mgfini_##mname(void) \
	86	{ \
	87	if (_mg_##mname.next) \
	88	_mg_##mname.next->ref = _mg_##mname.ref; \
	89	*_mg_##mname.ref = _mg_##mname.next; \
	90	}
	91
	92
	93	#define DECLARE_MTYPE(name) \
	94	extern struct memtype _mt_##name; \
	95	static struct memtype *const MTYPE_##name = &_mt_##name;
	96
	97	#define DEFINE_MTYPE_ATTR(group, mname, attr, desc) \
	98	attr struct memtype _mt_##mname \
	99	__attribute__((section(".data.mtypes"))) = { \
	100	.name = desc, \
	101	.next = NULL, \
	102	.n_alloc = 0, \
	103	.size = 0, \
	104	.ref = NULL, \
	105	}; \
	106	static void _mtinit_##mname(void) __attribute__((_CONSTRUCTOR(1001))); \
	107	static void _mtinit_##mname(void) \
	108	{ \
	109	if (_mg_##group.insert == NULL) \
	110	_mg_##group.insert = &_mg_##group.types; \
	111	_mt_##mname.ref = _mg_##group.insert; \
	112	*_mg_##group.insert = &_mt_##mname; \
	113	_mg_##group.insert = &_mt_##mname.next; \
	114	} \
	115	static void _mtfini_##mname(void) __attribute__((_DESTRUCTOR(1001))); \
	116	static void _mtfini_##mname(void) \
	117	{ \
	118	if (_mt_##mname.next) \
	119	_mt_##mname.next->ref = _mt_##mname.ref; \
	120	*_mt_##mname.ref = _mt_##mname.next; \
	121	}
	122
	123	#define DEFINE_MTYPE(group, name, desc) DEFINE_MTYPE_ATTR(group, name, , desc)
	124	#define DEFINE_MTYPE_STATIC(group, name, desc) \
	125	DEFINE_MTYPE_ATTR(group, name, static, desc) \
	126	static struct memtype *const MTYPE_##name = &_mt_##name;
3b4cd783	127
4a1ab8e4 DL	128	DECLARE_MGROUP(LIB)
4a1ab8e4 DL	129	DECLARE_MTYPE(TMP)
9a14899b	130	DECLARE_MTYPE(PREFIX_FLOWSPEC)
4a1ab8e4	131
3b4cd783	132
fa7fe831	133	extern void qmalloc(struct memtype mt, size_t size)
d62a17ae	134	__attribute__((malloc, _ALLOC_SIZE(2), nonnull(1) _RET_NONNULL));
fa7fe831	135	extern void qcalloc(struct memtype mt, size_t size)
d62a17ae	136	__attribute__((malloc, _ALLOC_SIZE(2), nonnull(1) _RET_NONNULL));
fa7fe831	137	extern void qrealloc(struct memtype mt, void *ptr, size_t size)
d62a17ae	138	__attribute__((_ALLOC_SIZE(3), nonnull(1) _RET_NONNULL));
	139	extern void qstrdup(struct memtype mt, const char *str)
	140	__attribute__((malloc, nonnull(1) _RET_NONNULL));
	141	extern void qfree(struct memtype mt, void ptr) __attribute__((nonnull(1)));
3b4cd783	142
3b4cd783 DL	143	#define XMALLOC(mtype, size) qmalloc(mtype, size)
	144	#define XCALLOC(mtype, size) qcalloc(mtype, size)
	145	#define XREALLOC(mtype, ptr, size) qrealloc(mtype, ptr, size)
	146	#define XSTRDUP(mtype, str) qstrdup(mtype, str)
d62a17ae	147	#define XFREE(mtype, ptr) \
	148	do { \
	149	qfree(mtype, ptr); \
	150	ptr = NULL; \
	151	} while (0)
3b4cd783 DL	152
	153	static inline size_t mtype_stats_alloc(struct memtype *mt)
	154	{
	155	return mt->n_alloc;
	156	}
3b4cd783 DL	157
	158	/* NB: calls are ordered by memgroup; and there is a call with mt == NULL for
	159	* each memgroup (so that a header can be printed, and empty memgroups show)
	160	*
	161	* return value: 0: continue, !0: abort walk. qmem_walk will return the
	162	* last value from qmem_walk_fn. */
fa7fe831 DL	163	typedef int qmem_walk_fn(void arg, struct memgroup mg, struct memtype *mt);
fa7fe831 DL	164	extern int qmem_walk(qmem_walk_fn func, void arg);
9eed278b DL	165	extern int log_memstats(FILE fp, const char );
9eed278b DL	166	#define log_memstats_stderr(prefix) log_memstats(stderr, prefix)
3b4cd783	167
fa7fe831	168	extern void memory_oom(size_t size, const char *name);
3b4cd783 DL	169
3b4cd783 DL	170	#endif /* _QUAGGA_MEMORY_H */