mem.c 35.9 KB
Newer Older
Bob Halley's avatar
base  
Bob Halley committed
1
/*
Brian Wellington's avatar
Brian Wellington committed
2
 * Copyright (C) 1997-2001  Internet Software Consortium.
3
 *
Bob Halley's avatar
base  
Bob Halley committed
4 5 6
 * 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.
7
 *
8 9 10 11 12 13 14 15
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
 * DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
 * INTERNET SOFTWARE CONSORTIUM 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.
Bob Halley's avatar
base  
Bob Halley committed
16 17
 */

18
/* $Id: mem.c,v 1.92 2001/06/05 22:14:18 tale Exp $ */
David Lawrence's avatar
David Lawrence committed
19

Bob Halley's avatar
Bob Halley committed
20
#include <config.h>
Bob Halley's avatar
base  
Bob Halley committed
21 22 23

#include <stdio.h>
#include <stdlib.h>
Bob Halley's avatar
Bob Halley committed
24
#include <stddef.h>
Bob Halley's avatar
base  
Bob Halley committed
25

Michael Graff's avatar
Michael Graff committed
26 27
#include <limits.h>

28
#include <isc/magic.h>
Bob Halley's avatar
Bob Halley committed
29
#include <isc/mem.h>
30
#include <isc/msgs.h>
31
#include <isc/ondestroy.h>
32
#include <isc/string.h>
Bob Halley's avatar
Bob Halley committed
33

Bob Halley's avatar
update  
Bob Halley committed
34
#include <isc/mutex.h>
Michael Graff's avatar
Michael Graff committed
35
#include <isc/util.h>
Bob Halley's avatar
update  
Bob Halley committed
36

37
unsigned int isc_mem_debugging = 0;
38

39 40 41 42 43 44 45 46 47 48
/*
 * Define ISC_MEM_USE_INTERNAL_MALLOC=1 to use the internal malloc()
 * implementation in preference to the system one.  The internal malloc()
 * is very space-efficient, and quite fast on uniprocessor systems.  It
 * performs poorly on multiprocessor machines.
 */
#ifndef ISC_MEM_USE_INTERNAL_MALLOC
#define ISC_MEM_USE_INTERNAL_MALLOC 0
#endif

49 50 51 52 53 54
/*
 * Constants.
 */

#define DEF_MAX_SIZE		1100
#define DEF_MEM_TARGET		4096
55 56
#define ALIGNMENT_SIZE		8		/* must be a power of 2 */
#define NUM_BASIC_BLOCKS	64		/* must be > 1 */
57
#define TABLE_INCREMENT		1024
Michael Graff's avatar
Michael Graff committed
58
#define DEBUGLIST_COUNT		1024
59

Bob Halley's avatar
base  
Bob Halley committed
60 61 62
/*
 * Types.
 */
63
#if ISC_MEM_TRACKLINES
Michael Graff's avatar
Michael Graff committed
64 65 66 67 68 69 70 71
typedef struct debuglink debuglink_t;
struct debuglink {
	ISC_LINK(debuglink_t)	link;
	const void	       *ptr[DEBUGLIST_COUNT];
	const char	       *file[DEBUGLIST_COUNT];
	unsigned int		line[DEBUGLIST_COUNT];
	unsigned int		count;
};
Bob Halley's avatar
base  
Bob Halley committed
72

Michael Graff's avatar
Michael Graff committed
73 74 75 76 77 78
#define FLARG_PASS	, file, line
#define FLARG		, const char *file, int line
#else
#define FLARG_PASS
#define FLARG
#endif
79

Michael Graff's avatar
Michael Graff committed
80
typedef struct element element;
81 82 83
struct element {
	element *		next;
};
Bob Halley's avatar
base  
Bob Halley committed
84 85 86 87 88

typedef struct {
	/*
	 * This structure must be ALIGNMENT_SIZE bytes.
	 */
89 90 91 92
	union {
		size_t		size;
		char		bytes[ALIGNMENT_SIZE];
	} u;
Bob Halley's avatar
Bob Halley committed
93
} size_info;
Bob Halley's avatar
base  
Bob Halley committed
94 95

struct stats {
Bob Halley's avatar
Bob Halley committed
96 97
	unsigned long		gets;
	unsigned long		totalgets;
98
#if ISC_MEM_USE_INTERNAL_MALLOC
Bob Halley's avatar
Bob Halley committed
99 100
	unsigned long		blocks;
	unsigned long		freefrags;
101
#endif /* ISC_MEM_USE_INTERNAL_MALLOC */
Bob Halley's avatar
base  
Bob Halley committed
102 103
};

104 105
#define MEM_MAGIC		ISC_MAGIC('M', 'e', 'm', 'C')
#define VALID_CONTEXT(c)	ISC_MAGIC_VALID(c, MEM_MAGIC)
Bob Halley's avatar
Bob Halley committed
106

107
struct isc_mem {
Bob Halley's avatar
Bob Halley committed
108
	unsigned int		magic;
109
	isc_ondestroy_t		ondestroy;
Bob Halley's avatar
Bob Halley committed
110
	isc_mutex_t		lock;
111 112 113
	isc_memalloc_t		memalloc;
	isc_memfree_t		memfree;
	void *			arg;
Bob Halley's avatar
base  
Bob Halley committed
114
	size_t			max_size;
115
	isc_boolean_t		checkfree;
Bob Halley's avatar
base  
Bob Halley committed
116
	struct stats *		stats;
117
	unsigned int		references;
118
	size_t			quota;
Bob Halley's avatar
Bob Halley committed
119
	size_t			total;
120
	size_t			inuse;
121 122 123 124 125
	size_t			hi_water;
	size_t			lo_water;
	isc_boolean_t		hi_called;
	isc_mem_water_t		water;
	void *			water_arg;
Michael Graff's avatar
Michael Graff committed
126
	ISC_LIST(isc_mempool_t)	pools;
127 128 129 130 131 132 133 134 135 136 137 138

#if ISC_MEM_USE_INTERNAL_MALLOC
	size_t			mem_target;
	element **		freelists;
	element *		basic_blocks;
	unsigned char **	basic_table;
	unsigned int		basic_table_count;
	unsigned int		basic_table_size;
	unsigned char *		lowest;
	unsigned char *		highest;
#endif /* ISC_MEM_USE_INTERNAL_MALLOC */

139
#if ISC_MEM_TRACKLINES
Michael Graff's avatar
Michael Graff committed
140 141
	ISC_LIST(debuglink_t)	debuglist;
#endif
Michael Graff's avatar
Michael Graff committed
142 143
};

144 145
#define MEMPOOL_MAGIC		ISC_MAGIC('M', 'E', 'M', 'p')
#define VALID_MEMPOOL(c)	ISC_MAGIC_VALID(c, MEMPOOL_MAGIC)
Michael Graff's avatar
Michael Graff committed
146 147

struct isc_mempool {
Michael Graff's avatar
Michael Graff committed
148
	/* always unlocked */
Michael Graff's avatar
Michael Graff committed
149
	unsigned int	magic;		/* magic number */
Michael Graff's avatar
Michael Graff committed
150
	isc_mutex_t    *lock;		/* optional lock */
Michael Graff's avatar
Michael Graff committed
151
	isc_mem_t      *mctx;		/* our memory context */
Michael Graff's avatar
Michael Graff committed
152 153 154
	/* locked via the memory context's lock */
	ISC_LINK(isc_mempool_t)	link;	/* next pool in this mem context */
	/* optionally locked from here down */
Michael Graff's avatar
Michael Graff committed
155 156 157 158 159 160 161 162 163
	element	       *items;		/* low water item list */
	size_t		size;		/* size of each item on this pool */
	unsigned int	maxalloc;	/* max number of items allowed */
	unsigned int	allocated;	/* # of items currently given out */
	unsigned int	freecount;	/* # of items on reserved list */
	unsigned int	freemax;	/* # of items allowed on free list */
	unsigned int	fillcount;	/* # of items to fetch on each fill */
	/* Stats only. */
	unsigned int	gets;		/* # of requests to this pool */
Michael Graff's avatar
Michael Graff committed
164
	/* Debugging only. */
165
#if ISC_MEMPOOL_NAMES
Michael Graff's avatar
Michael Graff committed
166 167
	char		name[16];	/* printed name in stats reports */
#endif
Bob Halley's avatar
base  
Bob Halley committed
168 169
};

170 171 172
/*
 * Private Inline-able.
 */
Bob Halley's avatar
base  
Bob Halley committed
173

174
#if ! ISC_MEM_TRACKLINES
Michael Graff's avatar
Michael Graff committed
175 176 177 178 179 180 181 182 183
#define ADD_TRACE(a, b, c, d, e)
#define DELETE_TRACE(a, b, c, d, e)
#else
#define ADD_TRACE(a, b, c, d, e)	add_trace_entry(a, b, c, d, e)
#define DELETE_TRACE(a, b, c, d, e)	delete_trace_entry(a, b, c, d, e)

#define MEM_TRACE	((isc_mem_debugging & ISC_MEM_DEBUGTRACE) != 0)
#define MEM_RECORD	((isc_mem_debugging & ISC_MEM_DEBUGRECORD) != 0)

184 185 186
static void
print_active(isc_mem_t *ctx, FILE *out);

Michael Graff's avatar
Michael Graff committed
187 188 189 190 191
/*
 * mctx must be locked.
 */
static inline void
add_trace_entry(isc_mem_t *mctx, const void *ptr, unsigned int size
Michael Graff's avatar
pasto  
Michael Graff committed
192
		FLARG)
Michael Graff's avatar
Michael Graff committed
193 194 195 196 197
{
	debuglink_t *dl;
	unsigned int i;

	if (MEM_TRACE)
198 199 200 201
		fprintf(stderr, isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
					       ISC_MSG_ADDTRACE,
					       "add %p size %u "
					       "file %s line %u mctx %p\n"),
202
			ptr, size, file, line, mctx);
Michael Graff's avatar
Michael Graff committed
203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249

	if (!MEM_RECORD)
		return;

	dl = ISC_LIST_HEAD(mctx->debuglist);
	while (dl != NULL) {
		if (dl->count == DEBUGLIST_COUNT)
			goto next;
		for (i = 0 ; i < DEBUGLIST_COUNT ; i++) {
			if (dl->ptr[i] == NULL) {
				dl->ptr[i] = ptr;
				dl->file[i] = file;
				dl->line[i] = line;
				dl->count++;
				return;
			}
		}
	next:
		dl = ISC_LIST_NEXT(dl, link);
	}

	dl = malloc(sizeof(debuglink_t));
	INSIST(dl != NULL);

	ISC_LINK_INIT(dl, link);
	for (i = 1 ; i < DEBUGLIST_COUNT ; i++) {
		dl->ptr[i] = NULL;
		dl->file[i] = NULL;
		dl->line[i] = 0;
	}

	dl->ptr[0] = ptr;
	dl->file[0] = file;
	dl->line[0] = line;
	dl->count = 1;

	ISC_LIST_PREPEND(mctx->debuglist, dl, link);
}

static inline void
delete_trace_entry(isc_mem_t *mctx, const void *ptr, unsigned int size,
		   const char *file, unsigned int line)
{
	debuglink_t *dl;
	unsigned int i;

	if (MEM_TRACE)
250 251 252 253
		fprintf(stderr, isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
					       ISC_MSG_DELTRACE,
					       "del %p size %u "
					       "file %s line %u mctx %p\n"),
254
			ptr, size, file, line, mctx);
Michael Graff's avatar
Michael Graff committed
255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287

	if (!MEM_RECORD)
		return;

	dl = ISC_LIST_HEAD(mctx->debuglist);
	while (dl != NULL) {
		for (i = 0 ; i < DEBUGLIST_COUNT ; i++) {
			if (dl->ptr[i] == ptr) {
				dl->ptr[i] = NULL;
				dl->file[i] = NULL;
				dl->line[i] = 0;

				INSIST(dl->count > 0);
				dl->count--;
				if (dl->count == 0) {
					ISC_LIST_UNLINK(mctx->debuglist,
							dl, link);
					free(dl);
				}
				return;
			}
		}
		dl = ISC_LIST_NEXT(dl, link);
	}

	/*
	 * If we get here, we didn't find the item on the list.  We're
	 * screwed.
	 */
	INSIST(dl != NULL);
}
#endif /* ISC_MEM_TRACKLINES */

288
#if ISC_MEM_USE_INTERNAL_MALLOC
289 290 291 292 293
static inline size_t
rmsize(size_t size) {
	/*
 	 * round down to ALIGNMENT_SIZE
	 */
294
	return (size & (~(ALIGNMENT_SIZE - 1)));
295 296
}

297
static inline size_t
Bob Halley's avatar
base  
Bob Halley committed
298 299
quantize(size_t size) {
	/*
300
	 * Round up the result in order to get a size big
Bob Halley's avatar
base  
Bob Halley committed
301 302 303
	 * enough to satisfy the request and be aligned on ALIGNMENT_SIZE
	 * byte boundaries.
	 */
304

305 306
	if (size == 0)
		return (ALIGNMENT_SIZE);
307
	return ((size + ALIGNMENT_SIZE - 1) & (~(ALIGNMENT_SIZE - 1)));
Bob Halley's avatar
base  
Bob Halley committed
308 309
}

310
static inline isc_boolean_t
311
more_basic_blocks(isc_mem_t *ctx) {
312 313 314 315 316
	void *new;
	unsigned char *curr, *next;
	unsigned char *first, *last;
	unsigned char **table;
	unsigned int table_size;
Bob Halley's avatar
Bob Halley committed
317
	size_t increment;
318 319 320 321
	int i;

	/* Require: we hold the context lock. */

322 323 324
	/*
	 * Did we hit the quota for this context?
	 */
Bob Halley's avatar
Bob Halley committed
325 326
	increment = NUM_BASIC_BLOCKS * ctx->mem_target;
	if (ctx->quota != 0 && ctx->total + increment > ctx->quota)
327
		return (ISC_FALSE);
328 329 330

	INSIST(ctx->basic_table_count <= ctx->basic_table_size);
	if (ctx->basic_table_count == ctx->basic_table_size) {
331
		table_size = ctx->basic_table_size + TABLE_INCREMENT;
332 333
		table = (ctx->memalloc)(ctx->arg,
					table_size * sizeof (unsigned char *));
334
		if (table == NULL)
335
			return (ISC_FALSE);
336 337 338 339
		if (ctx->basic_table_size != 0) {
			memcpy(table, ctx->basic_table,
			       ctx->basic_table_size *
			       sizeof (unsigned char *));
340
			(ctx->memfree)(ctx->arg, ctx->basic_table);
341
		}
342 343
		ctx->basic_table = table;
		ctx->basic_table_size = table_size;
344
	}
345

346
	new = (ctx->memalloc)(ctx->arg, NUM_BASIC_BLOCKS * ctx->mem_target);
347
	if (new == NULL)
348
		return (ISC_FALSE);
Bob Halley's avatar
Bob Halley committed
349
	ctx->total += increment;
350 351
	ctx->basic_table[ctx->basic_table_count] = new;
	ctx->basic_table_count++;
352

353 354 355
	curr = new;
	next = curr + ctx->mem_target;
	for (i = 0; i < (NUM_BASIC_BLOCKS - 1); i++) {
356
		((element *)curr)->next = (element *)next;
357 358 359 360 361 362 363
		curr = next;
		next += ctx->mem_target;
	}
	/*
	 * curr is now pointing at the last block in the
	 * array.
	 */
Bob Halley's avatar
Bob Halley committed
364
	((element *)curr)->next = NULL;
365 366 367 368 369 370 371
	first = new;
	last = first + NUM_BASIC_BLOCKS * ctx->mem_target - 1;
	if (first < ctx->lowest || ctx->lowest == NULL)
		ctx->lowest = first;
	if (last > ctx->highest)
		ctx->highest = last;
	ctx->basic_blocks = new;
372 373

	return (ISC_TRUE);
374 375
}

376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393
static inline isc_boolean_t
more_frags(isc_mem_t *ctx, size_t new_size) {
	int i, frags;
	size_t total_size;
	void *new;
	unsigned char *curr, *next;

	/*
	 * Try to get more fragments by chopping up a basic block.
	 */

	if (ctx->basic_blocks == NULL) {
		if (!more_basic_blocks(ctx)) {
			/*
			 * We can't get more memory from the OS, or we've
			 * hit the quota for this context.
			 */
			/*
394
			 * XXXRTH  "At quota" notification here.
395
			 */
396
			return (ISC_FALSE);
397 398 399 400 401 402 403 404 405 406 407 408 409 410 411
		}
	}

	total_size = ctx->mem_target;
	new = ctx->basic_blocks;
	ctx->basic_blocks = ctx->basic_blocks->next;
	frags = total_size / new_size;
	ctx->stats[new_size].blocks++;
	ctx->stats[new_size].freefrags += frags;
	/*
	 * Set up a linked-list of blocks of size
	 * "new_size".
	 */
	curr = new;
	next = curr + new_size;
412
	total_size -= new_size;
413 414 415 416
	for (i = 0; i < (frags - 1); i++) {
		((element *)curr)->next = (element *)next;
		curr = next;
		next += new_size;
417 418 419 420 421 422 423 424 425 426
		total_size -= new_size;
	}
	/*
	 * Add the remaining fragment of the basic block to a free list.
	 */
	total_size = rmsize(total_size);
	if (total_size > 0) {
		((element *)next)->next = ctx->freelists[total_size];
		ctx->freelists[total_size] = (element *)next;
		ctx->stats[total_size].freefrags++;
427 428 429 430 431 432 433 434 435 436 437
	}
	/*
	 * curr is now pointing at the last block in the
	 * array.
	 */
	((element *)curr)->next = NULL;
	ctx->freelists[new_size] = new;

	return (ISC_TRUE);
}

Michael Graff's avatar
Michael Graff committed
438
static inline void *
439
mem_getunlocked(isc_mem_t *ctx, size_t size) {
Michael Graff's avatar
Michael Graff committed
440 441
	size_t new_size = quantize(size);
	void *ret;
Bob Halley's avatar
base  
Bob Halley committed
442 443

	if (size >= ctx->max_size || new_size >= ctx->max_size) {
444 445 446
		/*
		 * memget() was called on something beyond our upper limit.
		 */
Bob Halley's avatar
Bob Halley committed
447 448 449 450
		if (ctx->quota != 0 && ctx->total + size > ctx->quota) {
			ret = NULL;
			goto done;
		}
Mark Andrews's avatar
Mark Andrews committed
451
		ret = (ctx->memalloc)(ctx->arg, size);
Bob Halley's avatar
base  
Bob Halley committed
452
		if (ret != NULL) {
Bob Halley's avatar
Bob Halley committed
453
			ctx->total += size;
454
			ctx->inuse += size;
Bob Halley's avatar
base  
Bob Halley committed
455 456
			ctx->stats[ctx->max_size].gets++;
			ctx->stats[ctx->max_size].totalgets++;
Mark Andrews's avatar
Mark Andrews committed
457 458 459 460 461 462
			/*
			 * If we don't set new_size to size, then the
			 * ISC_MEM_FILL code might write over bytes we
			 * don't own.
			 */
			new_size = size;
Bob Halley's avatar
base  
Bob Halley committed
463 464 465 466
		}
		goto done;
	}

467
	/*
Bob Halley's avatar
base  
Bob Halley committed
468 469 470 471
	 * If there are no blocks in the free list for this size, get a chunk
	 * of memory and then break it up into "new_size"-sized blocks, adding
	 * them to the free list.
	 */
472 473
	if (ctx->freelists[new_size] == NULL && !more_frags(ctx, new_size))
		return (NULL);
Bob Halley's avatar
base  
Bob Halley committed
474

475 476 477
	/*
	 * The free list uses the "rounded-up" size "new_size".
	 */
Bob Halley's avatar
base  
Bob Halley committed
478 479 480
	ret = ctx->freelists[new_size];
	ctx->freelists[new_size] = ctx->freelists[new_size]->next;

481
	/*
Bob Halley's avatar
base  
Bob Halley committed
482 483 484 485 486 487 488 489
	 * The stats[] uses the _actual_ "size" requested by the
	 * caller, with the caveat (in the code above) that "size" >= the
	 * max. size (max_size) ends up getting recorded as a call to
	 * max_size.
	 */
	ctx->stats[size].gets++;
	ctx->stats[size].totalgets++;
	ctx->stats[new_size].freefrags--;
490
	ctx->inuse += new_size;
Bob Halley's avatar
base  
Bob Halley committed
491 492 493

 done:

494
#if ISC_MEM_FILL
495 496
	if (ret != NULL)
		memset(ret, 0xbe, new_size); /* Mnemonic for "beef". */
David Lawrence's avatar
David Lawrence committed
497 498 499
#endif

	return (ret);
Michael Graff's avatar
Michael Graff committed
500 501
}

502 503 504 505 506 507 508 509 510 511 512 513 514 515 516
#if ISC_MEM_FILL && ISC_MEM_CHECKOVERRUN
static inline void
check_overrun(void *mem, size_t size, size_t new_size) {
	unsigned char *cp;

	cp = (unsigned char *)mem;
	cp += size;
	while (size < new_size) {
		INSIST(*cp == 0xbe);
		cp++;
		size++;
	}
}
#endif

Michael Graff's avatar
Michael Graff committed
517
static inline void
518
mem_putunlocked(isc_mem_t *ctx, void *mem, size_t size) {
Michael Graff's avatar
Michael Graff committed
519
	size_t new_size = quantize(size);
Bob Halley's avatar
base  
Bob Halley committed
520

521
	if (size == ctx->max_size || new_size >= ctx->max_size) {
522 523 524
		/*
		 * memput() called on something beyond our upper limit.
		 */
525
#if ISC_MEM_FILL
Mark Andrews's avatar
Mark Andrews committed
526 527
		memset(mem, 0xde, size); /* Mnemonic for "dead". */
#endif
528
		(ctx->memfree)(ctx->arg, mem);
Bob Halley's avatar
base  
Bob Halley committed
529 530
		INSIST(ctx->stats[ctx->max_size].gets != 0);
		ctx->stats[ctx->max_size].gets--;
Bob Halley's avatar
Bob Halley committed
531
		INSIST(size <= ctx->total);
532
		ctx->inuse -= size;
Bob Halley's avatar
Bob Halley committed
533
		ctx->total -= size;
Michael Graff's avatar
Michael Graff committed
534
		return;
Bob Halley's avatar
base  
Bob Halley committed
535 536
	}

537 538
#if ISC_MEM_FILL
#if ISC_MEM_CHECKOVERRUN
539 540
	check_overrun(mem, size, new_size);
#endif
Mark Andrews's avatar
Mark Andrews committed
541 542
	memset(mem, 0xde, new_size); /* Mnemonic for "dead". */
#endif
543

544 545 546
	/*
	 * The free list uses the "rounded-up" size "new_size".
	 */
Mark Andrews's avatar
Mark Andrews committed
547 548
	((element *)mem)->next = ctx->freelists[new_size];
	ctx->freelists[new_size] = (element *)mem;
Bob Halley's avatar
base  
Bob Halley committed
549

550
	/*
Bob Halley's avatar
base  
Bob Halley committed
551 552 553 554 555 556 557 558
	 * The stats[] uses the _actual_ "size" requested by the
	 * caller, with the caveat (in the code above) that "size" >= the
	 * max. size (max_size) ends up getting recorded as a call to
	 * max_size.
	 */
	INSIST(ctx->stats[size].gets != 0);
	ctx->stats[size].gets--;
	ctx->stats[new_size].freefrags++;
559
	ctx->inuse -= new_size;
Bob Halley's avatar
base  
Bob Halley committed
560 561
}

562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595
#else /* ISC_MEM_USE_INTERNAL_MALLOC */

/*
 * Perform a malloc, doing memory filling and overrun detection as necessary.
 */
static inline void *
mem_get(isc_mem_t *ctx, size_t size) {
	char *ret;

#if ISC_MEM_CHECKOVERRUN
	size += 1;
#endif

	ret = (ctx->memalloc)(ctx->arg, size);

#if ISC_MEM_FILL
	if (ret != NULL)
		memset(ret, 0xbe, size); /* Mnemonic for "beef". */
#else
#  if ISC_MEM_CHECKOVERRUN
	if (ret != NULL)
		ret[size-1] = 0xbe;
#  endif
#endif

	return (ret);
}

/*
 * Perform a free, doing memory filling and overrun detection as necessary.
 */
static inline void
mem_put(isc_mem_t *ctx, void *mem, size_t size) {
#if ISC_MEM_CHECKOVERRUN
596
	INSIST(((unsigned char *)mem)[size] == 0xbe);
597 598 599
#endif
#if ISC_MEM_FILL
	memset(mem, 0xde, size); /* Mnemonic for "dead". */
Andreas Gustafsson's avatar
Andreas Gustafsson committed
600 601
#else
	UNUSED(size);
602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643
#endif
	(ctx->memfree)(ctx->arg, mem);
}

/*
 * Update internal counters after a memory get.
 */
static inline void
mem_getstats(isc_mem_t *ctx, size_t size) {
	ctx->total += size;
	ctx->inuse += size;

	if (size > ctx->max_size) {
		ctx->stats[ctx->max_size].gets++;
		ctx->stats[ctx->max_size].totalgets++;
	} else {
		ctx->stats[size].gets++;
		ctx->stats[size].totalgets++;
	}
}

/*
 * Update internal counters after a memory put.
 */
static inline void
mem_putstats(isc_mem_t *ctx, void *ptr, size_t size) {
	UNUSED(ptr);

	INSIST(ctx->inuse >= size);
	ctx->inuse -= size;

	if (size > ctx->max_size) {
		INSIST(ctx->stats[ctx->max_size].gets > 0);
		ctx->stats[ctx->max_size].gets--;
	} else {
		INSIST(ctx->stats[size].gets > 0);
		ctx->stats[size].gets--;
	}
}

#endif /* ISC_MEM_USE_INTERNAL_MALLOC */

David Lawrence's avatar
David Lawrence committed
644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669
/*
 * Private.
 */

static void *
default_memalloc(void *arg, size_t size) {
	UNUSED(arg);
	return (malloc(size));
}

static void
default_memfree(void *arg, void *ptr) {
	UNUSED(arg);
	free(ptr);
}

/*
 * Public.
 */

isc_result_t
isc_mem_createx(size_t init_max_size, size_t target_size,
		isc_memalloc_t memalloc, isc_memfree_t memfree, void *arg,
		isc_mem_t **ctxp)
{
	isc_mem_t *ctx;
670
	isc_result_t result;
David Lawrence's avatar
David Lawrence committed
671 672 673 674 675

	REQUIRE(ctxp != NULL && *ctxp == NULL);
	REQUIRE(memalloc != NULL);
	REQUIRE(memfree != NULL);

676 677
	INSIST((ALIGNMENT_SIZE & (ALIGNMENT_SIZE - 1)) == 0);

678 679 680 681
#if !ISC_MEM_USE_INTERNAL_MALLOC
	UNUSED(target_size);
#endif

David Lawrence's avatar
David Lawrence committed
682 683 684 685 686 687 688 689
	ctx = (memalloc)(arg, sizeof *ctx);
	if (ctx == NULL)
		return (ISC_R_NOMEMORY);

	if (init_max_size == 0)
		ctx->max_size = DEF_MAX_SIZE;
	else
		ctx->max_size = init_max_size;
690 691 692 693 694 695 696 697 698 699 700 701 702 703 704
	ctx->references = 1;
	ctx->quota = 0;
	ctx->total = 0;
	ctx->inuse = 0;
	ctx->hi_water = 0;
	ctx->lo_water = 0;
	ctx->hi_called = ISC_FALSE;
	ctx->water = NULL;
	ctx->water_arg = NULL;
	ctx->magic = MEM_MAGIC;
	isc_ondestroy_init(&ctx->ondestroy);
	ctx->memalloc = memalloc;
	ctx->memfree = memfree;
	ctx->arg = arg;
	ctx->stats = NULL;
705
	ctx->checkfree = ISC_TRUE;
706 707 708 709 710 711 712 713 714 715 716 717 718 719 720
	ISC_LIST_INIT(ctx->pools);

#if ISC_MEM_USE_INTERNAL_MALLOC
	ctx->freelists = NULL;
#endif /* ISC_MEM_USE_INTERNAL_MALLOC */

	ctx->stats = (memalloc)(arg,
				(ctx->max_size+1) * sizeof (struct stats));
	if (ctx->stats == NULL) {
		result = ISC_R_NOMEMORY;
		goto error;
	}
	memset(ctx->stats, 0, (ctx->max_size + 1) * sizeof (struct stats));

#if ISC_MEM_USE_INTERNAL_MALLOC
David Lawrence's avatar
David Lawrence committed
721 722 723 724 725 726
	if (target_size == 0)
		ctx->mem_target = DEF_MEM_TARGET;
	else
		ctx->mem_target = target_size;
	ctx->freelists = (memalloc)(arg, ctx->max_size * sizeof (element *));
	if (ctx->freelists == NULL) {
727 728
		result = ISC_R_NOMEMORY;
		goto error;
David Lawrence's avatar
David Lawrence committed
729 730 731 732 733 734 735 736 737
	}
	memset(ctx->freelists, 0,
	       ctx->max_size * sizeof (element *));
	ctx->basic_blocks = NULL;
	ctx->basic_table = NULL;
	ctx->basic_table_count = 0;
	ctx->basic_table_size = 0;
	ctx->lowest = NULL;
	ctx->highest = NULL;
738 739
#endif /* ISC_MEM_USE_INTERNAL_MALLOC */

David Lawrence's avatar
David Lawrence committed
740 741
	if (isc_mutex_init(&ctx->lock) != ISC_R_SUCCESS) {
		UNEXPECTED_ERROR(__FILE__, __LINE__,
742 743 744
				 "isc_mutex_init() %s",
				 isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
						ISC_MSG_FAILED, "failed"));
745 746
		result = ISC_R_UNEXPECTED;
		goto error;
David Lawrence's avatar
David Lawrence committed
747
	}
748

749
#if ISC_MEM_TRACKLINES
Michael Graff's avatar
Michael Graff committed
750 751
	ISC_LIST_INIT(ctx->debuglist);
#endif
David Lawrence's avatar
David Lawrence committed
752 753 754

	*ctxp = ctx;
	return (ISC_R_SUCCESS);
755 756 757 758 759 760 761 762 763 764 765 766 767

  error:
	if (ctx) {
		if (ctx->stats)
			(memfree)(arg, ctx->stats);
#if ISC_MEM_USE_INTERNAL_MALLOC
		if (ctx->freelists)
			(memfree)(arg, ctx->freelists);
#endif /* ISC_MEM_USE_INTERNAL_MALLOC */
		(memfree)(arg, ctx);
	}

	return (result);
David Lawrence's avatar
David Lawrence committed
768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785
}

isc_result_t
isc_mem_create(size_t init_max_size, size_t target_size,
	       isc_mem_t **ctxp)
{
	return (isc_mem_createx(init_max_size, target_size,
				default_memalloc, default_memfree, NULL,
				ctxp));
}

static void
destroy(isc_mem_t *ctx) {
	unsigned int i;
	isc_ondestroy_t ondest;

	ctx->magic = 0;

786
#if ISC_MEM_USE_INTERNAL_MALLOC
David Lawrence's avatar
David Lawrence committed
787
	INSIST(ISC_LIST_EMPTY(ctx->pools));
788 789
#endif /* ISC_MEM_USE_INTERNAL_MALLOC */

790
#if ISC_MEM_TRACKLINES
791 792 793
	if (ctx->checkfree) {
		if (!ISC_LIST_EMPTY(ctx->debuglist))
			print_active(ctx, stderr);
794
		INSIST(ISC_LIST_EMPTY(ctx->debuglist));
795
	} else {
796 797 798 799 800 801 802 803 804
		debuglink_t *dl;

		for (dl = ISC_LIST_HEAD(ctx->debuglist);
		     dl != NULL;
		     dl = ISC_LIST_HEAD(ctx->debuglist)) {
			ISC_LIST_UNLINK(ctx->debuglist, dl, link);
			free(dl);
		}
	}
Michael Graff's avatar
Michael Graff committed
805
#endif
David Lawrence's avatar
David Lawrence committed
806 807 808
	INSIST(ctx->references == 0);

	if (ctx->checkfree) {
809 810 811 812 813
		for (i = 0; i <= ctx->max_size; i++) {
#if ISC_MEM_TRACKLINES
			if (ctx->stats[i].gets != 0)
				print_active(ctx, stderr);
#endif
David Lawrence's avatar
David Lawrence committed
814
			INSIST(ctx->stats[i].gets == 0);
815
		}
David Lawrence's avatar
David Lawrence committed
816 817
	}

818
	(ctx->memfree)(ctx->arg, ctx->stats);
David Lawrence's avatar
David Lawrence committed
819

820
#if ISC_MEM_USE_INTERNAL_MALLOC
David Lawrence's avatar
David Lawrence committed
821 822 823 824
	for (i = 0; i < ctx->basic_table_count; i++)
		(ctx->memfree)(ctx->arg, ctx->basic_table[i]);
	(ctx->memfree)(ctx->arg, ctx->freelists);
	(ctx->memfree)(ctx->arg, ctx->basic_table);
825
#endif /* ISC_MEM_USE_INTERNAL_MALLOC */
David Lawrence's avatar
David Lawrence committed
826 827 828

	ondest = ctx->ondestroy;

829
	DESTROYLOCK(&ctx->lock);
David Lawrence's avatar
David Lawrence committed
830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868
	(ctx->memfree)(ctx->arg, ctx);

	isc_ondestroy_notify(&ondest, ctx);
}

void
isc_mem_attach(isc_mem_t *source, isc_mem_t **targetp) {
	REQUIRE(VALID_CONTEXT(source));
	REQUIRE(targetp != NULL && *targetp == NULL);

	LOCK(&source->lock);
	source->references++;
	UNLOCK(&source->lock);

	*targetp = source;
}

void
isc_mem_detach(isc_mem_t **ctxp) {
	isc_mem_t *ctx;
	isc_boolean_t want_destroy = ISC_FALSE;

	REQUIRE(ctxp != NULL);
	ctx = *ctxp;
	REQUIRE(VALID_CONTEXT(ctx));

	LOCK(&ctx->lock);
	INSIST(ctx->references > 0);
	ctx->references--;
	if (ctx->references == 0)
		want_destroy = ISC_TRUE;
	UNLOCK(&ctx->lock);

	if (want_destroy)
		destroy(ctx);

	*ctxp = NULL;
}

869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894
/*
 * isc_mem_putanddetach() is the equivalent of:
 *
 * mctx = NULL;
 * isc_mem_attach(ptr->mctx, &mctx);
 * isc_mem_detach(&ptr->mctx);
 * isc_mem_put(mctx, ptr, sizeof(*ptr);
 * isc_mem_detach(&mctx);
 */

void
isc__mem_putanddetach(isc_mem_t **ctxp, void *ptr, size_t size FLARG) {
	isc_mem_t *ctx;
	isc_boolean_t want_destroy = ISC_FALSE;

	REQUIRE(ctxp != NULL);
	ctx = *ctxp;
	REQUIRE(VALID_CONTEXT(ctx));
	REQUIRE(ptr != NULL);

	/*
	 * Must be before mem_putunlocked() as ctxp is usually within
	 * [ptr..ptr+size).
	 */
	*ctxp = NULL;

895
#if ISC_MEM_USE_INTERNAL_MALLOC
896 897
	LOCK(&ctx->lock);
	mem_putunlocked(ctx, ptr, size);
898 899 900 901 902 903 904
#else /* ISC_MEM_USE_INTERNAL_MALLOC */
	mem_put(ctx, ptr, size);
	LOCK(&ctx->lock);
	mem_putstats(ctx, ptr, size);
#endif /* ISC_MEM_USE_INTERNAL_MALLOC */

	DELETE_TRACE(ctx, ptr, size, file, line);
905 906 907 908
	INSIST(ctx->references > 0);
	ctx->references--;
	if (ctx->references == 0)
		want_destroy = ISC_TRUE;
909

910 911 912 913 914 915
	UNLOCK(&ctx->lock);

	if (want_destroy)
		destroy(ctx);
}

David Lawrence's avatar
David Lawrence committed
916 917 918 919 920 921 922 923 924 925 926 927 928 929
void
isc_mem_destroy(isc_mem_t **ctxp) {
	isc_mem_t *ctx;

	/*
	 * This routine provides legacy support for callers who use mctxs
	 * without attaching/detaching.
	 */

	REQUIRE(ctxp != NULL);
	ctx = *ctxp;
	REQUIRE(VALID_CONTEXT(ctx));

	LOCK(&ctx->lock);
930
#if ISC_MEM_TRACKLINES
931 932 933
	if (ctx->references != 1)
		print_active(ctx, stderr);
#endif
David Lawrence's avatar
David Lawrence committed
934 935 936 937
	REQUIRE(ctx->references == 1);
	ctx->references--;
	UNLOCK(&ctx->lock);

Brian Wellington's avatar
Brian Wellington committed
938
	destroy(ctx);
David Lawrence's avatar
David Lawrence committed
939 940 941 942 943 944 945

	*ctxp = NULL;
}

isc_result_t
isc_mem_ondestroy(isc_mem_t *ctx, isc_task_t *task, isc_event_t **event) {
	isc_result_t res;
946

David Lawrence's avatar
David Lawrence committed
947 948 949 950 951 952 953 954
	LOCK(&ctx->lock);
	res = isc_ondestroy_register(&ctx->ondestroy, task, event);
	UNLOCK(&ctx->lock);

	return (res);
}


Michael Graff's avatar
Michael Graff committed
955 956 957
void *
isc__mem_get(isc_mem_t *ctx, size_t size FLARG) {
	void *ptr;
958
	isc_boolean_t call_water = ISC_FALSE;
Michael Graff's avatar
Michael Graff committed
959

David Lawrence's avatar
David Lawrence committed
960 961
	REQUIRE(VALID_CONTEXT(ctx));

962
#if ISC_MEM_USE_INTERNAL_MALLOC
David Lawrence's avatar
David Lawrence committed
963
	LOCK(&ctx->lock);
Michael Graff's avatar
Michael Graff committed
964
	ptr = mem_getunlocked(ctx, size);
965 966 967 968 969 970
#else /* ISC_MEM_USE_INTERNAL_MALLOC */
	ptr = mem_get(ctx, size);
	LOCK(&ctx->lock);
	mem_getstats(ctx, size);
#endif /* ISC_MEM_USE_INTERNAL_MALLOC */

Michael Graff's avatar
Michael Graff committed
971
	ADD_TRACE(ctx, ptr, size, file, line);
972 973 974 975 976
	if (ctx->hi_water != 0 && !ctx->hi_called &&
	    ctx->inuse > ctx->hi_water) {
		ctx->hi_called = ISC_TRUE;
		call_water = ISC_TRUE;
	}
David Lawrence's avatar
David Lawrence committed
977
	UNLOCK(&ctx->lock);
978 979 980 981 982

	if (call_water) {
		(ctx->water)(ctx->water_arg, ISC_MEM_HIWATER);
	}

Bob Halley's avatar
base  
Bob Halley committed
983 984 985 986
	return (ptr);
}

void
Michael Graff's avatar
Michael Graff committed
987
isc__mem_put(isc_mem_t *ctx, void *ptr, size_t size FLARG)
Bob Halley's avatar
base  
Bob Halley committed
988
{
989 990
	isc_boolean_t call_water = ISC_FALSE;

Michael Graff's avatar
Michael Graff committed
991 992 993
	REQUIRE(VALID_CONTEXT(ctx));
	REQUIRE(ptr != NULL);

994
#if ISC_MEM_USE_INTERNAL_MALLOC
Michael Graff's avatar
Michael Graff committed
995 996
	LOCK(&ctx->lock);
	mem_putunlocked(ctx, ptr, size);
997 998 999 1000 1001 1002 1003
#else /* ISC_MEM_USE_INTERNAL_MALLOC */
	mem_put(ctx, ptr, size);
	LOCK(&ctx->lock);
	mem_putstats(ctx, ptr, size);
#endif /* ISC_MEM_USE_INTERNAL_MALLOC */

	DELETE_TRACE(ctx, ptr, size, file, line);
1004 1005 1006 1007 1008 1009 1010 1011

	/*
	 * The check against ctx->lo_water == 0 is for the condition
	 * when the context was pushed over hi_water but then had
	 * isc_mem_setwater() called with 0 for hi_water and lo_water.
	 */
	if (ctx->hi_called && 
	    (ctx->inuse < ctx->lo_water || ctx->lo_water == 0)) {
1012
		ctx->hi_called = ISC_FALSE;
1013 1014 1015

		if (ctx->water != NULL)
			call_water = ISC_TRUE;
1016
	}
Michael Graff's avatar
Michael Graff committed
1017
	UNLOCK(&ctx->lock);
1018 1019 1020 1021

	if (call_water) {
		(ctx->water)(ctx->water_arg, ISC_MEM_LOWATER);
	}
Bob Halley's avatar
base  
Bob Halley committed
1022 1023
}

1024
#if ISC_MEM_TRACKLINES
1025 1026 1027 1028 1029 1030 1031 1032
static void
print_active(isc_mem_t *ctx, FILE *out) {
	if (isc_mem_debugging > 1) {
		debuglink_t *dl;
		unsigned int i;

		fprintf(out, isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
					    ISC_MSG_DUMPALLOC,
Andreas Gustafsson's avatar
Andreas Gustafsson committed
1033 1034
					    "Dump of all outstanding "
					    "memory allocations:\n"));
1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060
		dl = ISC_LIST_HEAD(ctx->debuglist);
		if (dl == NULL)
			fprintf(out, isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
						    ISC_MSG_NONE,
						    "\tNone.\n"));
		while (dl != NULL) {
			for (i = 0 ; i < DEBUGLIST_COUNT ; i++)
				if (dl->ptr[i] != NULL)
					fprintf(out,
						isc_msgcat_get(isc_msgcat,
							   ISC_MSGSET_MEM,
							   ISC_MSG_PTRFILELINE,
							   "\tptr %p "
							   "file %s "
							   "line %u\n"),
						dl->ptr[i], dl->file[i],
						dl->line[i]);
			dl = ISC_LIST_NEXT(dl, link);
		}
	}
}
#endif

/*
 * Print the stats[] on the stream "out" with suitable formatting.
 */
Bob Halley's avatar
base  
Bob Halley committed
1061
void
1062
isc_mem_stats(isc_mem_t *ctx, FILE *out) {
Bob Halley's avatar
base  
Bob Halley committed
1063
	size_t i;
Michael Graff's avatar
Michael Graff committed
1064 1065
	const struct stats *s;
	const isc_mempool_t *pool;
Bob Halley's avatar
base  
Bob Halley committed
1066

Bob Halley's avatar
Bob Halley committed
1067 1068
	REQUIRE(VALID_CONTEXT(ctx));
	LOCK(&ctx->lock);
Bob Halley's avatar
base  
Bob Halley committed
1069

1070 1071
	for (i = 0; i <= ctx->max_size; i++) {
		s = &ctx->stats[i];
Michael Graff's avatar
Michael Graff committed
1072

1073 1074 1075 1076 1077
		if (s->totalgets == 0 && s->gets == 0)
			continue;
		fprintf(out, "%s%5lu: %11lu gets, %11lu rem",
			(i == ctx->max_size) ? ">=" : "  ",
			(unsigned long) i, s->totalgets, s->gets);
1078
#if ISC_MEM_USE_INTERNAL_MALLOC
1079 1080 1081
		if (s->blocks != 0 || s->freefrags != 0)
			fprintf(out, " (%lu bl, %lu ff)",
				s->blocks, s->freefrags);
1082
#endif /* ISC_MEM_USE_INTERNAL_MALLOC */
1083
		fputc('\n', out);
Michael Graff's avatar
Michael Graff committed
1084 1085
	}

Michael Graff's avatar
Michael Graff committed
1086 1087 1088 1089 1090 1091 1092
	/*
	 * Note that since a pool can be locked now, these stats might be
	 * somewhat off if the pool is in active use at the time the stats
	 * are dumped.  The link fields are protected by the isc_mem_t's
	 * lock, however, so walking this list and extracting integers from
	 * stats fields is always safe.
	 */
Michael Graff's avatar
Michael Graff committed
1093 1094
	pool = ISC_LIST_HEAD(ctx->pools);
	if (pool != NULL) {
1095 1096 1097
		fprintf(out, isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
					    ISC_MSG_POOLSTATS,
					    "[Pool statistics]\n"));
Michael Graff's avatar
Michael Graff committed
1098
		fprintf(out, "%15s %10s %10s %10s %10s %10s %10s %10s %1s\n",
1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115
			isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
				       ISC_MSG_POOLNAME, "name"),
			isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
				       ISC_MSG_POOLSIZE, "size"),
			isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
				       ISC_MSG_POOLMAXALLOC, "maxalloc"),
			isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
				       ISC_MSG_POOLALLOCATED, "allocated"),
			isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
				       ISC_MSG_POOLFREECOUNT, "freecount"),
			isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
				       ISC_MSG_POOLFREEMAX, "freemax"),
			isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
				       ISC_MSG_POOLFILLCOUNT, "fillcount"),
			isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
				       ISC_MSG_POOLGETS, "gets"),
			"L");
Michael Graff's avatar
Michael Graff committed
1116 1117
	}
	while (pool != NULL) {
1118 1119
		fprintf(out, "%15s %10lu %10u %10u %10u %10u %10u %10u %s\n",
			pool->name, (unsigned long) pool->size, pool->maxalloc,
Michael Graff's avatar
Michael Graff committed
1120 1121
			pool->allocated, pool->freecount, pool->freemax,
			pool->fillcount, pool->gets,
Michael Graff's avatar
Michael Graff committed
1122
			(pool->lock == NULL ? "N" : "Y"));
Michael Graff's avatar
Michael Graff committed
1123
		pool = ISC_LIST_NEXT(pool, link);
Bob Halley's avatar
base  
Bob Halley committed
1124 1125
	}

1126
#if ISC_MEM_TRACKLINES
1127
	print_active(ctx, out);
Michael Graff's avatar
Michael Graff committed
1128 1129
#endif

Bob Halley's avatar
Bob Halley committed
1130
	UNLOCK(&ctx->lock);
Bob Halley's avatar
base  
Bob Halley committed
1131 1132 1133
}

/*
1134 1135
 * Replacements for malloc() and free() -- they implicitly remember the
 * size of the object allocated (with some additional overhead).
Bob Halley's avatar
base  
Bob Halley committed
1136 1137
 */

Michael Graff's avatar
Michael Graff committed
1138 1139
static void *
isc__mem_allocateunlocked(isc_mem_t *ctx, size_t size) {
Bob Halley's avatar
Bob Halley committed
1140
	size_info *si;
Bob Halley's avatar