pack-objects.c 32.6 KB
Newer Older
Michael Schubert committed
1
/*
Edward Thomson committed
2
 * Copyright (C) the libgit2 contributors. All rights reserved.
Michael Schubert committed
3 4 5 6 7 8 9
 *
 * This file is part of libgit2, distributed under the GNU GPL v2 with
 * a Linking Exception. For full terms see the included COPYING file.
 */

#include "pack-objects.h"

10
#include "zstream.h"
Michael Schubert committed
11 12 13 14 15 16
#include "delta.h"
#include "iterator.h"
#include "netops.h"
#include "pack.h"
#include "thread-utils.h"
#include "tree.h"
17
#include "util.h"
Michael Schubert committed
18 19 20 21 22 23 24 25 26 27 28

#include "git2/pack.h"
#include "git2/commit.h"
#include "git2/tag.h"
#include "git2/indexer.h"
#include "git2/config.h"

struct unpacked {
	git_pobject *object;
	void *data;
	struct git_delta_index *index;
Linquize committed
29
	int depth;
Michael Schubert committed
30 31
};

32 33 34 35 36
struct tree_walk_context {
	git_packbuilder *pb;
	git_buf buf;
};

37
struct pack_write_context {
38
	git_indexer *indexer;
39 40 41
	git_transfer_progress *stats;
};

42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
#ifdef GIT_THREADS

#define GIT_PACKBUILDER__MUTEX_OP(pb, mtx, op) do { \
		int result = git_mutex_##op(&(pb)->mtx); \
		assert(!result); \
		GIT_UNUSED(result); \
	} while (0)

#else

#define GIT_PACKBUILDER__MUTEX_OP(pb,mtx,op) GIT_UNUSED(pb)

#endif /* GIT_THREADS */

#define git_packbuilder__cache_lock(pb) GIT_PACKBUILDER__MUTEX_OP(pb, cache_mutex, lock)
#define git_packbuilder__cache_unlock(pb) GIT_PACKBUILDER__MUTEX_OP(pb, cache_mutex, unlock)
#define git_packbuilder__progress_lock(pb) GIT_PACKBUILDER__MUTEX_OP(pb, progress_mutex, lock)
#define git_packbuilder__progress_unlock(pb) GIT_PACKBUILDER__MUTEX_OP(pb, progress_mutex, unlock)

61 62 63
/* The minimal interval between progress updates (in seconds). */
#define MIN_PROGRESS_UPDATE_INTERVAL 0.5

64 65 66
/* Size of the buffer to feed to zlib */
#define COMPRESS_BUFLEN (1024 * 1024)

Michael Schubert committed
67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90
static unsigned name_hash(const char *name)
{
	unsigned c, hash = 0;

	if (!name)
		return 0;

	/*
	 * This effectively just creates a sortable number from the
	 * last sixteen non-whitespace characters. Last characters
	 * count "most", so things that end in ".c" sort together.
	 */
	while ((c = *name++) != 0) {
		if (git__isspace(c))
			continue;
		hash = (hash >> 2) + (c << 24);
	}
	return hash;
}

static int packbuilder_config(git_packbuilder *pb)
{
	git_config *config;
	int ret;
91
	int64_t val;
Michael Schubert committed
92 93 94 95

	if (git_repository_config__weakptr(&config, pb->repo) < 0)
		return -1;

96 97 98 99 100
#define config_get(KEY,DST,DFLT) do { \
	ret = git_config_get_int64(&val, config, KEY); \
	if (!ret) (DST) = val; \
	else if (ret == GIT_ENOTFOUND) (DST) = (DFLT); \
	else if (ret < 0) return -1; } while (0)
Michael Schubert committed
101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120

	config_get("pack.deltaCacheSize", pb->max_delta_cache_size,
		   GIT_PACK_DELTA_CACHE_SIZE);
	config_get("pack.deltaCacheLimit", pb->cache_max_small_delta_size,
		   GIT_PACK_DELTA_CACHE_LIMIT);
	config_get("pack.deltaCacheSize", pb->big_file_threshold,
		   GIT_PACK_BIG_FILE_THRESHOLD);
	config_get("pack.windowMemory", pb->window_memory_limit, 0);

#undef config_get

	return 0;
}

int git_packbuilder_new(git_packbuilder **out, git_repository *repo)
{
	git_packbuilder *pb;

	*out = NULL;

121
	pb = git__calloc(1, sizeof(*pb));
Michael Schubert committed
122 123
	GITERR_CHECK_ALLOC(pb);

124
	pb->object_ix = git_oidmap_alloc();
125 126 127

	if (!pb->object_ix)
		goto on_error;
128

Michael Schubert committed
129 130 131
	pb->repo = repo;
	pb->nr_threads = 1; /* do not spawn any thread by default */

132
	if (git_hash_ctx_init(&pb->ctx) < 0 ||
133
		git_zstream_init(&pb->zstream) < 0 ||
134 135
		git_repository_odb(&pb->odb, repo) < 0 ||
		packbuilder_config(pb) < 0)
Michael Schubert committed
136 137
		goto on_error;

138 139 140 141 142
#ifdef GIT_THREADS

	if (git_mutex_init(&pb->cache_mutex) ||
		git_mutex_init(&pb->progress_mutex) ||
		git_cond_init(&pb->progress_cond))
Russell Belfer committed
143 144
	{
		giterr_set(GITERR_OS, "Failed to initialize packbuilder mutex");
Michael Schubert committed
145
		goto on_error;
Russell Belfer committed
146
	}
Michael Schubert committed
147

148 149
#endif

Michael Schubert committed
150 151 152 153
	*out = pb;
	return 0;

on_error:
154
	git_packbuilder_free(pb);
Michael Schubert committed
155 156 157
	return -1;
}

158
unsigned int git_packbuilder_set_threads(git_packbuilder *pb, unsigned int n)
Michael Schubert committed
159 160
{
	assert(pb);
161 162

#ifdef GIT_THREADS
Michael Schubert committed
163
	pb->nr_threads = n;
164 165 166 167 168
#else
	GIT_UNUSED(n);
	assert(1 == pb->nr_threads);
#endif

169
	return pb->nr_threads;
Michael Schubert committed
170 171
}

172 173 174 175 176 177 178 179 180 181 182 183 184 185
static void rehash(git_packbuilder *pb)
{
	git_pobject *po;
	khiter_t pos;
	unsigned int i;
	int ret;

	kh_clear(oid, pb->object_ix);
	for (i = 0, po = pb->object_list; i < pb->nr_objects; i++, po++) {
		pos = kh_put(oid, pb->object_ix, &po->id, &ret);
		kh_value(pb->object_ix, pos) = po;
	}
}

Michael Schubert committed
186 187 188 189
int git_packbuilder_insert(git_packbuilder *pb, const git_oid *oid,
			   const char *name)
{
	git_pobject *po;
190 191
	khiter_t pos;
	int ret;
Michael Schubert committed
192 193 194

	assert(pb && oid);

195 196
	/* If the object already exists in the hash table, then we don't
	 * have any work to do */
197 198
	pos = kh_get(oid, pb->object_ix, oid);
	if (pos != kh_end(pb->object_ix))
Michael Schubert committed
199 200 201 202 203 204 205
		return 0;

	if (pb->nr_objects >= pb->nr_alloc) {
		pb->nr_alloc = (pb->nr_alloc + 1024) * 3 / 2;
		pb->object_list = git__realloc(pb->object_list,
					       pb->nr_alloc * sizeof(*po));
		GITERR_CHECK_ALLOC(pb->object_list);
206
		rehash(pb);
Michael Schubert committed
207 208
	}

209
	po = pb->object_list + pb->nr_objects;
Michael Schubert committed
210 211
	memset(po, 0x0, sizeof(*po));

212 213
	if ((ret = git_odb_read_header(&po->size, &po->type, pb->odb, oid)) < 0)
		return ret;
214 215

	pb->nr_objects++;
Michael Schubert committed
216
	git_oid_cpy(&po->id, oid);
217
	po->hash = name_hash(name);
Michael Schubert committed
218

219
	pos = kh_put(oid, pb->object_ix, &po->id, &ret);
220 221 222 223
	if (ret < 0) {
		giterr_set_oom();
		return ret;
	}
224 225
	assert(ret != 0);
	kh_value(pb->object_ix, pos) = po;
Michael Schubert committed
226

227 228
	pb->done = false;

229 230
	if (pb->progress_cb) {
		double current_time = git__timer();
231 232 233
		double elapsed = current_time - pb->last_progress_report_time;

		if (elapsed >= MIN_PROGRESS_UPDATE_INTERVAL) {
234
			pb->last_progress_report_time = current_time;
235

236
			ret = pb->progress_cb(
237
				GIT_PACKBUILDER_ADDING_OBJECTS,
238 239 240
				pb->nr_objects, 0, pb->progress_cb_payload);

			if (ret)
241
				return giterr_set_after_callback(ret);
242 243 244
		}
	}

Michael Schubert committed
245 246 247 248 249 250 251 252 253 254 255 256 257 258 259
	return 0;
}

static int get_delta(void **out, git_odb *odb, git_pobject *po)
{
	git_odb_object *src = NULL, *trg = NULL;
	unsigned long delta_size;
	void *delta_buf;

	*out = NULL;

	if (git_odb_read(&src, odb, &po->delta->id) < 0 ||
	    git_odb_read(&trg, odb, &po->id) < 0)
		goto on_error;

260 261 262 263
	delta_buf = git_delta(
		git_odb_object_data(src), (unsigned long)git_odb_object_size(src),
		git_odb_object_data(trg), (unsigned long)git_odb_object_size(trg),
		&delta_size, 0);
Michael Schubert committed
264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281

	if (!delta_buf || delta_size != po->delta_size) {
		giterr_set(GITERR_INVALID, "Delta size changed");
		goto on_error;
	}

	*out = delta_buf;

	git_odb_object_free(src);
	git_odb_object_free(trg);
	return 0;

on_error:
	git_odb_object_free(src);
	git_odb_object_free(trg);
	return -1;
}

282 283 284 285 286
static int write_object(
	git_packbuilder *pb,
	git_pobject *po,
	int (*write_cb)(void *buf, size_t size, void *cb_data),
	void *cb_data)
Michael Schubert committed
287 288 289
{
	git_odb_object *obj = NULL;
	git_otype type;
290
	unsigned char hdr[10], *zbuf = NULL;
291
	void *data = NULL;
292 293
	size_t hdr_len, zbuf_len = COMPRESS_BUFLEN, data_len;
	int error;
Michael Schubert committed
294

295 296 297 298 299
	/*
	 * If we have a delta base, let's use the delta to save space.
	 * Otherwise load the whole object. 'data' ends up pointing to
	 * whatever data we want to put into the packfile.
	 */
Michael Schubert committed
300 301
	if (po->delta) {
		if (po->delta_data)
302 303
			data = po->delta_data;
		else if ((error = get_delta(&data, pb->odb, po)) < 0)
304 305 306
				goto done;

		data_len = po->delta_size;
Michael Schubert committed
307 308
		type = GIT_OBJ_REF_DELTA;
	} else {
309 310
		if ((error = git_odb_read(&obj, pb->odb, &po->id)) < 0)
			goto done;
Michael Schubert committed
311 312

		data = (void *)git_odb_object_data(obj);
313
		data_len = git_odb_object_size(obj);
Michael Schubert committed
314 315 316 317
		type = git_odb_object_type(obj);
	}

	/* Write header */
318
	hdr_len = git_packfile__object_header(hdr, data_len, type);
Michael Schubert committed
319

320 321 322
	if ((error = write_cb(hdr, hdr_len, cb_data)) < 0 ||
		(error = git_hash_update(&pb->ctx, hdr, hdr_len)) < 0)
		goto done;
Michael Schubert committed
323 324

	if (type == GIT_OBJ_REF_DELTA) {
325 326 327
		if ((error = write_cb(po->delta->id.id, GIT_OID_RAWSZ, cb_data)) < 0 ||
			(error = git_hash_update(&pb->ctx, po->delta->id.id, GIT_OID_RAWSZ)) < 0)
			goto done;
Michael Schubert committed
328 329 330
	}

	/* Write data */
331 332 333 334 335 336 337 338 339 340
	if (po->z_delta_size) {
		data_len = po->z_delta_size;

		if ((error = write_cb(data, data_len, cb_data)) < 0 ||
			(error = git_hash_update(&pb->ctx, data, data_len)) < 0)
			goto done;
	} else {
		zbuf = git__malloc(zbuf_len);
		GITERR_CHECK_ALLOC(zbuf);

341
		git_zstream_reset(&pb->zstream);
342
		git_zstream_set_input(&pb->zstream, data, data_len);
343

344 345 346 347
		while (!git_zstream_done(&pb->zstream)) {
			if ((error = git_zstream_get_output(zbuf, &zbuf_len, &pb->zstream)) < 0 ||
				(error = write_cb(zbuf, zbuf_len, cb_data)) < 0 ||
				(error = git_hash_update(&pb->ctx, zbuf, zbuf_len)) < 0)
348 349
				goto done;

350
			zbuf_len = COMPRESS_BUFLEN; /* reuse buffer */
351
		}
Michael Schubert committed
352 353
	}

354 355 356 357 358 359 360 361 362
	/*
	 * If po->delta is true, data is a delta and it is our
	 * responsibility to free it (otherwise it's a git_object's
	 * data). We set po->delta_data to NULL in case we got the
	 * data from there instead of get_delta(). If we didn't,
	 * there's no harm.
	 */
	if (po->delta) {
		git__free(data);
363 364
		po->delta_data = NULL;
	}
Michael Schubert committed
365 366 367

	pb->nr_written++;

368 369
done:
	git__free(zbuf);
Michael Schubert committed
370
	git_odb_object_free(obj);
371
	return error;
Michael Schubert committed
372 373 374 375 376 377 378 379 380
}

enum write_one_status {
	WRITE_ONE_SKIP = -1, /* already written */
	WRITE_ONE_BREAK = 0, /* writing this will bust the limit; not written */
	WRITE_ONE_WRITTEN = 1, /* normal */
	WRITE_ONE_RECURSIVE = 2 /* already scheduled to be written */
};

381 382 383 384 385 386
static int write_one(
	enum write_one_status *status,
	git_packbuilder *pb,
	git_pobject *po,
	int (*write_cb)(void *buf, size_t size, void *cb_data),
	void *cb_data)
Michael Schubert committed
387
{
388 389
	int error;

Michael Schubert committed
390 391 392 393 394 395 396 397 398 399
	if (po->recursing) {
		*status = WRITE_ONE_RECURSIVE;
		return 0;
	} else if (po->written) {
		*status = WRITE_ONE_SKIP;
		return 0;
	}

	if (po->delta) {
		po->recursing = 1;
400 401 402 403 404 405

		if ((error = write_one(status, pb, po->delta, write_cb, cb_data)) < 0)
			return error;

		/* we cannot depend on this one */
		if (*status == WRITE_ONE_RECURSIVE)
Michael Schubert committed
406 407 408 409 410
			po->delta = NULL;
	}

	po->written = 1;
	po->recursing = 0;
411 412

	return write_object(pb, po, write_cb, cb_data);
Michael Schubert committed
413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478
}

GIT_INLINE(void) add_to_write_order(git_pobject **wo, unsigned int *endp,
				    git_pobject *po)
{
	if (po->filled)
		return;
	wo[(*endp)++] = po;
	po->filled = 1;
}

static void add_descendants_to_write_order(git_pobject **wo, unsigned int *endp,
					   git_pobject *po)
{
	int add_to_order = 1;
	while (po) {
		if (add_to_order) {
			git_pobject *s;
			/* add this node... */
			add_to_write_order(wo, endp, po);
			/* all its siblings... */
			for (s = po->delta_sibling; s; s = s->delta_sibling) {
				add_to_write_order(wo, endp, s);
			}
		}
		/* drop down a level to add left subtree nodes if possible */
		if (po->delta_child) {
			add_to_order = 1;
			po = po->delta_child;
		} else {
			add_to_order = 0;
			/* our sibling might have some children, it is next */
			if (po->delta_sibling) {
				po = po->delta_sibling;
				continue;
			}
			/* go back to our parent node */
			po = po->delta;
			while (po && !po->delta_sibling) {
				/* we're on the right side of a subtree, keep
				 * going up until we can go right again */
				po = po->delta;
			}
			if (!po) {
				/* done- we hit our original root node */
				return;
			}
			/* pass it off to sibling at this level */
			po = po->delta_sibling;
		}
	};
}

static void add_family_to_write_order(git_pobject **wo, unsigned int *endp,
				      git_pobject *po)
{
	git_pobject *root;

	for (root = po; root->delta; root = root->delta)
		; /* nothing */
	add_descendants_to_write_order(wo, endp, root);
}

static int cb_tag_foreach(const char *name, git_oid *oid, void *data)
{
	git_packbuilder *pb = data;
479 480
	git_pobject *po;
	khiter_t pos;
Michael Schubert committed
481 482 483

	GIT_UNUSED(name);

484 485 486 487 488 489 490
	pos = kh_get(oid, pb->object_ix, oid);
	if (pos == kh_end(pb->object_ix))
		return 0;

	po = kh_value(pb->object_ix, pos);
	po->tagged = 1;

Michael Schubert committed
491
	/* TODO: peel objects */
492

Michael Schubert committed
493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526
	return 0;
}

static git_pobject **compute_write_order(git_packbuilder *pb)
{
	unsigned int i, wo_end, last_untagged;

	git_pobject **wo = git__malloc(sizeof(*wo) * pb->nr_objects);

	for (i = 0; i < pb->nr_objects; i++) {
		git_pobject *po = pb->object_list + i;
		po->tagged = 0;
		po->filled = 0;
		po->delta_child = NULL;
		po->delta_sibling = NULL;
	}

	/*
	 * Fully connect delta_child/delta_sibling network.
	 * Make sure delta_sibling is sorted in the original
	 * recency order.
	 */
	for (i = pb->nr_objects; i > 0;) {
		git_pobject *po = &pb->object_list[--i];
		if (!po->delta)
			continue;
		/* Mark me as the first child */
		po->delta_sibling = po->delta->delta_child;
		po->delta->delta_child = po;
	}

	/*
	 * Mark objects that are at the tip of tags.
	 */
527 528
	if (git_tag_foreach(pb->repo, &cb_tag_foreach, pb) < 0) {
		git__free(wo);
Michael Schubert committed
529
		return NULL;
530
	}
Michael Schubert committed
531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591

	/*
	 * Give the objects in the original recency order until
	 * we see a tagged tip.
	 */
	for (i = wo_end = 0; i < pb->nr_objects; i++) {
		git_pobject *po = pb->object_list + i;
		if (po->tagged)
			break;
		add_to_write_order(wo, &wo_end, po);
	}
	last_untagged = i;

	/*
	 * Then fill all the tagged tips.
	 */
	for (; i < pb->nr_objects; i++) {
		git_pobject *po = pb->object_list + i;
		if (po->tagged)
			add_to_write_order(wo, &wo_end, po);
	}

	/*
	 * And then all remaining commits and tags.
	 */
	for (i = last_untagged; i < pb->nr_objects; i++) {
		git_pobject *po = pb->object_list + i;
		if (po->type != GIT_OBJ_COMMIT &&
		    po->type != GIT_OBJ_TAG)
			continue;
		add_to_write_order(wo, &wo_end, po);
	}

	/*
	 * And then all the trees.
	 */
	for (i = last_untagged; i < pb->nr_objects; i++) {
		git_pobject *po = pb->object_list + i;
		if (po->type != GIT_OBJ_TREE)
			continue;
		add_to_write_order(wo, &wo_end, po);
	}

	/*
	 * Finally all the rest in really tight order
	 */
	for (i = last_untagged; i < pb->nr_objects; i++) {
		git_pobject *po = pb->object_list + i;
		if (!po->filled)
			add_family_to_write_order(wo, &wo_end, po);
	}

	if (wo_end != pb->nr_objects) {
		giterr_set(GITERR_INVALID, "invalid write order");
		return NULL;
	}

	return wo;
}

static int write_pack(git_packbuilder *pb,
592 593
	int (*write_cb)(void *buf, size_t size, void *cb_data),
	void *cb_data)
Michael Schubert committed
594 595 596 597 598
{
	git_pobject **write_order;
	git_pobject *po;
	enum write_one_status status;
	struct git_pack_header ph;
599
	git_oid entry_oid;
Michael Schubert committed
600
	unsigned int i = 0;
601
	int error = 0;
Michael Schubert committed
602 603

	write_order = compute_write_order(pb);
604 605 606 607
	if (write_order == NULL) {
		error = -1;
		goto done;
	}
Michael Schubert committed
608 609 610 611 612 613

	/* Write pack header */
	ph.hdr_signature = htonl(PACK_SIGNATURE);
	ph.hdr_version = htonl(PACK_VERSION);
	ph.hdr_entries = htonl(pb->nr_objects);

614 615
	if ((error = write_cb(&ph, sizeof(ph), cb_data)) < 0 ||
		(error = git_hash_update(&pb->ctx, &ph, sizeof(ph))) < 0)
616
		goto done;
Michael Schubert committed
617 618 619 620 621 622

	pb->nr_remaining = pb->nr_objects;
	do {
		pb->nr_written = 0;
		for ( ; i < pb->nr_objects; ++i) {
			po = write_order[i];
623 624

			if ((error = write_one(&status, pb, po, write_cb, cb_data)) < 0)
625
				goto done;
Michael Schubert committed
626 627 628 629 630
		}

		pb->nr_remaining -= pb->nr_written;
	} while (pb->nr_remaining && i < pb->nr_objects);

631
	if ((error = git_hash_final(&entry_oid, &pb->ctx)) < 0)
632
		goto done;
Michael Schubert committed
633

634
	error = write_cb(entry_oid.id, GIT_OID_RAWSZ, cb_data);
Michael Schubert committed
635

636
done:
637 638 639 640 641 642 643 644 645
	/* if callback cancelled writing, we must still free delta_data */
	for ( ; i < pb->nr_objects; ++i) {
		po = write_order[i];
		if (po->delta_data) {
			git__free(po->delta_data);
			po->delta_data = NULL;
		}
	}

Michael Schubert committed
646
	git__free(write_order);
647
	return error;
Michael Schubert committed
648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701
}

static int write_pack_buf(void *buf, size_t size, void *data)
{
	git_buf *b = (git_buf *)data;
	return git_buf_put(b, buf, size);
}

static int type_size_sort(const void *_a, const void *_b)
{
	const git_pobject *a = (git_pobject *)_a;
	const git_pobject *b = (git_pobject *)_b;

	if (a->type > b->type)
		return -1;
	if (a->type < b->type)
		return 1;
	if (a->hash > b->hash)
		return -1;
	if (a->hash < b->hash)
		return 1;
	/*
	 * TODO
	 *
	if (a->preferred_base > b->preferred_base)
		return -1;
	if (a->preferred_base < b->preferred_base)
		return 1;
	*/
	if (a->size > b->size)
		return -1;
	if (a->size < b->size)
		return 1;
	return a < b ? -1 : (a > b); /* newest first */
}

static int delta_cacheable(git_packbuilder *pb, unsigned long src_size,
			   unsigned long trg_size, unsigned long delta_size)
{
	if (pb->max_delta_cache_size &&
		pb->delta_cache_size + delta_size > pb->max_delta_cache_size)
		return 0;

	if (delta_size < pb->cache_max_small_delta_size)
		return 1;

	/* cache delta, if objects are large enough compared to delta size */
	if ((src_size >> 20) + (trg_size >> 21) > (delta_size >> 10))
		return 1;

	return 0;
}

static int try_delta(git_packbuilder *pb, struct unpacked *trg,
Linquize committed
702
		     struct unpacked *src, int max_depth,
Michael Schubert committed
703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727
		     unsigned long *mem_usage, int *ret)
{
	git_pobject *trg_object = trg->object;
	git_pobject *src_object = src->object;
	git_odb_object *obj;
	unsigned long trg_size, src_size, delta_size,
		      sizediff, max_size, sz;
	unsigned int ref_depth;
	void *delta_buf;

	/* Don't bother doing diffs between different types */
	if (trg_object->type != src_object->type) {
		*ret = -1;
		return 0;
	}

	*ret = 0;

	/* TODO: support reuse-delta */

	/* Let's not bust the allowed depth. */
	if (src->depth >= max_depth)
		return 0;

	/* Now some size filtering heuristics. */
728
	trg_size = (unsigned long)trg_object->size;
Michael Schubert committed
729 730 731 732 733 734 735 736 737 738 739 740 741
	if (!trg_object->delta) {
		max_size = trg_size/2 - 20;
		ref_depth = 1;
	} else {
		max_size = trg_object->delta_size;
		ref_depth = trg->depth;
	}

	max_size = (uint64_t)max_size * (max_depth - src->depth) /
					(max_depth - ref_depth + 1);
	if (max_size == 0)
		return 0;

742
	src_size = (unsigned long)src_object->size;
Michael Schubert committed
743 744 745 746 747 748 749 750 751 752 753
	sizediff = src_size < trg_size ? trg_size - src_size : 0;
	if (sizediff >= max_size)
		return 0;
	if (trg_size < src_size / 32)
		return 0;

	/* Load data if not already done */
	if (!trg->data) {
		if (git_odb_read(&obj, pb->odb, &trg_object->id) < 0)
			return -1;

754
		sz = (unsigned long)git_odb_object_size(obj);
Michael Schubert committed
755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772
		trg->data = git__malloc(sz);
		GITERR_CHECK_ALLOC(trg->data);
		memcpy(trg->data, git_odb_object_data(obj), sz);

		git_odb_object_free(obj);

		if (sz != trg_size) {
			giterr_set(GITERR_INVALID,
				   "Inconsistent target object length");
			return -1;
		}

		*mem_usage += sz;
	}
	if (!src->data) {
		if (git_odb_read(&obj, pb->odb, &src_object->id) < 0)
			return -1;

773
		sz = (unsigned long)git_odb_object_size(obj);
Michael Schubert committed
774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809
		src->data = git__malloc(sz);
		GITERR_CHECK_ALLOC(src->data);
		memcpy(src->data, git_odb_object_data(obj), sz);

		git_odb_object_free(obj);

		if (sz != src_size) {
			giterr_set(GITERR_INVALID,
				   "Inconsistent source object length");
			return -1;
		}

		*mem_usage += sz;
	}
	if (!src->index) {
		src->index = git_delta_create_index(src->data, src_size);
		if (!src->index)
			return 0; /* suboptimal pack - out of memory */

		*mem_usage += git_delta_sizeof_index(src->index);
	}

	delta_buf = git_delta_create(src->index, trg->data, trg_size,
				     &delta_size, max_size);
	if (!delta_buf)
		return 0;

	if (trg_object->delta) {
		/* Prefer only shallower same-sized deltas. */
		if (delta_size == trg_object->delta_size &&
		    src->depth + 1 >= trg->depth) {
			git__free(delta_buf);
			return 0;
		}
	}

810
	git_packbuilder__cache_lock(pb);
Michael Schubert committed
811 812 813 814 815 816 817
	if (trg_object->delta_data) {
		git__free(trg_object->delta_data);
		pb->delta_cache_size -= trg_object->delta_size;
		trg_object->delta_data = NULL;
	}
	if (delta_cacheable(pb, src_size, trg_size, delta_size)) {
		pb->delta_cache_size += delta_size;
818
		git_packbuilder__cache_unlock(pb);
Michael Schubert committed
819 820 821 822 823

		trg_object->delta_data = git__realloc(delta_buf, delta_size);
		GITERR_CHECK_ALLOC(trg_object->delta_data);
	} else {
		/* create delta when writing the pack */
824
		git_packbuilder__cache_unlock(pb);
Michael Schubert committed
825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855
		git__free(delta_buf);
	}

	trg_object->delta = src_object;
	trg_object->delta_size = delta_size;
	trg->depth = src->depth + 1;

	*ret = 1;
	return 0;
}

static unsigned int check_delta_limit(git_pobject *me, unsigned int n)
{
	git_pobject *child = me->delta_child;
	unsigned int m = n;

	while (child) {
		unsigned int c = check_delta_limit(child, n + 1);
		if (m < c)
			m = c;
		child = child->delta_sibling;
	}
	return m;
}

static unsigned long free_unpacked(struct unpacked *n)
{
	unsigned long freed_mem = git_delta_sizeof_index(n->index);
	git_delta_free_index(n->index);
	n->index = NULL;
	if (n->data) {
856
		freed_mem += (unsigned long)n->object->size;
Michael Schubert committed
857 858 859 860 861 862 863 864 865 866
		git__free(n->data);
		n->data = NULL;
	}
	n->object = NULL;
	n->depth = 0;
	return freed_mem;
}

static int find_deltas(git_packbuilder *pb, git_pobject **list,
		       unsigned int *list_size, unsigned int window,
867
		       int depth)
Michael Schubert committed
868 869 870 871 872 873 874 875 876 877 878 879 880 881
{
	git_pobject *po;
	git_buf zbuf = GIT_BUF_INIT;
	struct unpacked *array;
	uint32_t idx = 0, count = 0;
	unsigned long mem_usage = 0;
	unsigned int i;
	int error = -1;

	array = git__calloc(window, sizeof(struct unpacked));
	GITERR_CHECK_ALLOC(array);

	for (;;) {
		struct unpacked *n = array + idx;
882
		int max_depth, j, best_base = -1;
Michael Schubert committed
883

884
		git_packbuilder__progress_lock(pb);
Michael Schubert committed
885
		if (!*list_size) {
886
			git_packbuilder__progress_unlock(pb);
Michael Schubert committed
887 888 889 890 891
			break;
		}

		po = *list++;
		(*list_size)--;
892
		git_packbuilder__progress_unlock(pb);
Michael Schubert committed
893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952

		mem_usage -= free_unpacked(n);
		n->object = po;

		while (pb->window_memory_limit &&
		       mem_usage > pb->window_memory_limit &&
		       count > 1) {
			uint32_t tail = (idx + window - count) % window;
			mem_usage -= free_unpacked(array + tail);
			count--;
		}

		/*
		 * If the current object is at pack edge, take the depth the
		 * objects that depend on the current object into account
		 * otherwise they would become too deep.
		 */
		max_depth = depth;
		if (po->delta_child) {
			max_depth -= check_delta_limit(po, 0);
			if (max_depth <= 0)
				goto next;
		}

		j = window;
		while (--j > 0) {
			int ret;
			uint32_t other_idx = idx + j;
			struct unpacked *m;

			if (other_idx >= window)
				other_idx -= window;

			m = array + other_idx;
			if (!m->object)
				break;

			if (try_delta(pb, n, m, max_depth, &mem_usage, &ret) < 0)
				goto on_error;
			if (ret < 0)
				break;
			else if (ret > 0)
				best_base = other_idx;
		}

		/*
		 * If we decided to cache the delta data, then it is best
		 * to compress it right away.  First because we have to do
		 * it anyway, and doing it here while we're threaded will
		 * save a lot of time in the non threaded write phase,
		 * as well as allow for caching more deltas within
		 * the same cache size limit.
		 * ...
		 * But only if not writing to stdout, since in that case
		 * the network is most likely throttling writes anyway,
		 * and therefore it is best to go to the write phase ASAP
		 * instead, as we can afford spending more time compressing
		 * between writes at that moment.
		 */
		if (po->delta_data) {
953
			if (git_zstream_deflatebuf(&zbuf, po->delta_data, po->delta_size) < 0)
Michael Schubert committed
954 955 956 957 958 959 960
				goto on_error;

			git__free(po->delta_data);
			po->delta_data = git__malloc(zbuf.size);
			GITERR_CHECK_ALLOC(po->delta_data);

			memcpy(po->delta_data, zbuf.ptr, zbuf.size);
961
			po->z_delta_size = (unsigned long)zbuf.size;
Michael Schubert committed
962 963
			git_buf_clear(&zbuf);

964
			git_packbuilder__cache_lock(pb);
Michael Schubert committed
965 966
			pb->delta_cache_size -= po->delta_size;
			pb->delta_cache_size += po->z_delta_size;
967
			git_packbuilder__cache_unlock(pb);
Michael Schubert committed
968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044
		}

		/*
		 * If we made n a delta, and if n is already at max
		 * depth, leaving it in the window is pointless.  we
		 * should evict it first.
		 */
		if (po->delta && max_depth <= n->depth)
			continue;

		/*
		 * Move the best delta base up in the window, after the
		 * currently deltified object, to keep it longer.  It will
		 * be the first base object to be attempted next.
		 */
		if (po->delta) {
			struct unpacked swap = array[best_base];
			int dist = (window + idx - best_base) % window;
			int dst = best_base;
			while (dist--) {
				int src = (dst + 1) % window;
				array[dst] = array[src];
				dst = src;
			}
			array[dst] = swap;
		}

		next:
		idx++;
		if (count + 1 < window)
			count++;
		if (idx >= window)
			idx = 0;
	}
	error = 0;

on_error:
	for (i = 0; i < window; ++i) {
		git__free(array[i].index);
		git__free(array[i].data);
	}
	git__free(array);
	git_buf_free(&zbuf);

	return error;
}

#ifdef GIT_THREADS

struct thread_params {
	git_thread thread;
	git_packbuilder *pb;

	git_pobject **list;

	git_cond cond;
	git_mutex mutex;

	unsigned int list_size;
	unsigned int remaining;

	int window;
	int depth;
	int working;
	int data_ready;
};

static void *threaded_find_deltas(void *arg)
{
	struct thread_params *me = arg;

	while (me->remaining) {
		if (find_deltas(me->pb, me->list, &me->remaining,
				me->window, me->depth) < 0) {
			; /* TODO */
		}

1045
		git_packbuilder__progress_lock(me->pb);
Michael Schubert committed
1046
		me->working = 0;
1047 1048
		git_cond_signal(&me->pb->progress_cond);
		git_packbuilder__progress_unlock(me->pb);
Michael Schubert committed
1049

1050 1051 1052 1053 1054 1055 1056 1057
		if (git_mutex_lock(&me->mutex)) {
			giterr_set(GITERR_THREAD, "unable to lock packfile condition mutex");
			return NULL;
		}

		while (!me->data_ready)
			git_cond_wait(&me->cond, &me->mutex);

Michael Schubert committed
1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074
		/*
		 * We must not set ->data_ready before we wait on the
		 * condition because the main thread may have set it to 1
		 * before we get here. In order to be sure that new
		 * work is available if we see 1 in ->data_ready, it
		 * was initialized to 0 before this thread was spawned
		 * and we reset it to 0 right away.
		 */
		me->data_ready = 0;
		git_mutex_unlock(&me->mutex);
	}
	/* leave ->working 1 so that this doesn't get more work assigned */
	return NULL;
}

static int ll_find_deltas(git_packbuilder *pb, git_pobject **list,
			  unsigned int list_size, unsigned int window,
1075
			  int depth)
Michael Schubert committed
1076 1077 1078 1079 1080 1081
{
	struct thread_params *p;
	int i, ret, active_threads = 0;

	if (!pb->nr_threads)
		pb->nr_threads = git_online_cpus();
1082

Michael Schubert committed
1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148
	if (pb->nr_threads <= 1) {
		find_deltas(pb, list, &list_size, window, depth);
		return 0;
	}

	p = git__malloc(pb->nr_threads * sizeof(*p));
	GITERR_CHECK_ALLOC(p);

	/* Partition the work among the threads */
	for (i = 0; i < pb->nr_threads; ++i) {
		unsigned sub_size = list_size / (pb->nr_threads - i);

		/* don't use too small segments or no deltas will be found */
		if (sub_size < 2*window && i+1 < pb->nr_threads)
			sub_size = 0;

		p[i].pb = pb;
		p[i].window = window;
		p[i].depth = depth;
		p[i].working = 1;
		p[i].data_ready = 0;

		/* try to split chunks on "path" boundaries */
		while (sub_size && sub_size < list_size &&
		       list[sub_size]->hash &&
		       list[sub_size]->hash == list[sub_size-1]->hash)
			sub_size++;

		p[i].list = list;
		p[i].list_size = sub_size;
		p[i].remaining = sub_size;

		list += sub_size;
		list_size -= sub_size;
	}

	/* Start work threads */
	for (i = 0; i < pb->nr_threads; ++i) {
		if (!p[i].list_size)
			continue;

		git_mutex_init(&p[i].mutex);
		git_cond_init(&p[i].cond);

		ret = git_thread_create(&p[i].thread, NULL,
					threaded_find_deltas, &p[i]);
		if (ret) {
			giterr_set(GITERR_THREAD, "unable to create thread");
			return -1;
		}
		active_threads++;
	}

	/*
	 * Now let's wait for work completion.  Each time a thread is done
	 * with its work, we steal half of the remaining work from the
	 * thread with the largest number of unprocessed objects and give
	 * it to that newly idle thread.  This ensure good load balancing
	 * until the remaining object list segments are simply too short
	 * to be worth splitting anymore.
	 */
	while (active_threads) {
		struct thread_params *target = NULL;
		struct thread_params *victim = NULL;
		unsigned sub_size = 0;

1149 1150 1151 1152 1153
		/* Start by locating a thread that has transitioned its
		 * 'working' flag from 1 -> 0. This indicates that it is
		 * ready to receive more work using our work-stealing
		 * algorithm. */
		git_packbuilder__progress_lock(pb);
Michael Schubert committed
1154 1155 1156 1157 1158 1159
		for (;;) {
			for (i = 0; !target && i < pb->nr_threads; i++)
				if (!p[i].working)
					target = &p[i];
			if (target)
				break;
1160
			git_cond_wait(&pb->progress_cond, &pb->progress_mutex);
Michael Schubert committed
1161 1162
		}

1163 1164 1165
		/* At this point we hold the progress lock and have located
		 * a thread to receive more work. We still need to locate a
		 * thread from which to steal work (the victim). */
Michael Schubert committed
1166 1167 1168 1169
		for (i = 0; i < pb->nr_threads; i++)
			if (p[i].remaining > 2*window &&
			    (!victim || victim->remaining < p[i].remaining))
				victim = &p[i];
1170

Michael Schubert committed
1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195
		if (victim) {
			sub_size = victim->remaining / 2;
			list = victim->list + victim->list_size - sub_size;
			while (sub_size && list[0]->hash &&
			       list[0]->hash == list[-1]->hash) {
				list++;
				sub_size--;
			}
			if (!sub_size) {
				/*
				 * It is possible for some "paths" to have
				 * so many objects that no hash boundary
				 * might be found.  Let's just steal the
				 * exact half in that case.
				 */
				sub_size = victim->remaining / 2;
				list -= sub_size;
			}
			target->list = list;
			victim->list_size -= sub_size;
			victim->remaining -= sub_size;
		}
		target->list_size = sub_size;
		target->remaining = sub_size;
		target->working = 1;
1196
		git_packbuilder__progress_unlock(pb);
Michael Schubert committed
1197

1198 1199 1200 1201 1202 1203
		if (git_mutex_lock(&target->mutex)) {
			giterr_set(GITERR_THREAD, "unable to lock packfile condition mutex");
			git__free(p);
			return -1;
		}

Michael Schubert committed
1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231
		target->data_ready = 1;
		git_cond_signal(&target->cond);
		git_mutex_unlock(&target->mutex);

		if (!sub_size) {
			git_thread_join(target->thread, NULL);
			git_cond_free(&target->cond);
			git_mutex_free(&target->mutex);
			active_threads--;
		}
	}

	git__free(p);
	return 0;
}

#else
#define ll_find_deltas(pb, l, ls, w, d) find_deltas(pb, l, &ls, w, d)
#endif

static int prepare_pack(git_packbuilder *pb)
{
	git_pobject **delta_list;
	unsigned int i, n = 0;

	if (pb->nr_objects == 0 || pb->done)
		return 0; /* nothing to do */

1232 1233 1234 1235 1236 1237 1238
	/*
	 * Although we do not report progress during deltafication, we
	 * at least report that we are in the deltafication stage
	 */
	if (pb->progress_cb)
			pb->progress_cb(GIT_PACKBUILDER_DELTAFICATION, 0, pb->nr_objects, pb->progress_cb_payload);

Michael Schubert committed
1239 1240 1241 1242 1243 1244
	delta_list = git__malloc(pb->nr_objects * sizeof(*delta_list));
	GITERR_CHECK_ALLOC(delta_list);

	for (i = 0; i < pb->nr_objects; ++i) {
		git_pobject *po = pb->object_list + i;

1245 1246
		/* Make sure the item is within our size limits */
		if (po->size < 50 || po->size > pb->big_file_threshold)
Michael Schubert committed
1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268
			continue;

		delta_list[n++] = po;
	}

	if (n > 1) {
		git__tsort((void **)delta_list, n, type_size_sort);
		if (ll_find_deltas(pb, delta_list, n,
				   GIT_PACK_WINDOW + 1,
				   GIT_PACK_DEPTH) < 0) {
			git__free(delta_list);
			return -1;
		}
	}

	pb->done = true;
	git__free(delta_list);
	return 0;
}

#define PREPARE_PACK if (prepare_pack(pb) < 0) { return -1; }

1269 1270 1271 1272 1273 1274
int git_packbuilder_foreach(git_packbuilder *pb, int (*cb)(void *buf, size_t size, void *payload), void *payload)
{
	PREPARE_PACK;
	return write_pack(pb, cb, payload);
}

Michael Schubert committed
1275 1276 1277 1278 1279 1280
int git_packbuilder_write_buf(git_buf *buf, git_packbuilder *pb)
{
	PREPARE_PACK;
	return write_pack(pb, &write_pack_buf, buf);
}

1281
static int write_cb(void *buf, size_t len, void *payload)
Michael Schubert committed
1282
{
1283
	struct pack_write_context *ctx = payload;
1284
	return git_indexer_append(ctx->indexer, buf, len, ctx->stats);
1285 1286 1287 1288 1289
}

int git_packbuilder_write(
	git_packbuilder *pb,
	const char *path,
1290
	unsigned int mode,
1291 1292 1293
	git_transfer_progress_callback progress_cb,
	void *progress_cb_payload)
{
1294
	git_indexer *indexer;
1295 1296 1297
	git_transfer_progress stats;
	struct pack_write_context ctx;

Michael Schubert committed
1298
	PREPARE_PACK;
1299

1300
	if (git_indexer_new(
1301
		&indexer, path, mode, pb->odb, progress_cb, progress_cb_payload) < 0)
1302 1303 1304 1305 1306 1307
		return -1;

	ctx.indexer = indexer;
	ctx.stats = &stats;

	if (git_packbuilder_foreach(pb, write_cb, &ctx) < 0 ||
1308 1309
		git_indexer_commit(indexer, &stats) < 0) {
		git_indexer_free(indexer);
1310 1311 1312
		return -1;
	}

1313 1314
	git_oid_cpy(&pb->pack_oid, git_indexer_hash(indexer));

1315
	git_indexer_free(indexer);
1316
	return 0;
Michael Schubert committed
1317 1318 1319 1320
}

#undef PREPARE_PACK

1321 1322 1323 1324 1325
const git_oid *git_packbuilder_hash(git_packbuilder *pb)
{
	return &pb->pack_oid;
}

1326 1327
static int cb_tree_walk(
	const char *root, const git_tree_entry *entry, void *payload)
Michael Schubert committed
1328
{
1329
	int error;
1330
	struct tree_walk_context *ctx = payload;
Michael Schubert committed
1331

1332
	/* A commit inside a tree represents a submodule commit and should be skipped. */
1333
	if (git_tree_entry_type(entry) == GIT_OBJ_COMMIT)
1334 1335
		return 0;

1336 1337 1338 1339
	if (!(error = git_buf_sets(&ctx->buf, root)) &&
		!(error = git_buf_puts(&ctx->buf, git_tree_entry_name(entry))))
		error = git_packbuilder_insert(
			ctx->pb, git_tree_entry_id(entry), git_buf_cstr(&ctx->buf));
Michael Schubert committed
1340

1341
	return error;
Michael Schubert committed
1342 1343
}

1344 1345
int git_packbuilder_insert_commit(git_packbuilder *pb, const git_oid *oid)
{
Xavier L committed
1346
	git_commit *commit;
1347

Xavier L committed
1348 1349 1350
	if (git_commit_lookup(&commit, pb->repo, oid) < 0 ||
		git_packbuilder_insert(pb, oid, NULL) < 0)
		return -1;
1351

Xavier L committed
1352 1353
	if (git_packbuilder_insert_tree(pb, git_commit_tree_id(commit)) < 0)
		return -1;
1354

Xavier L committed
1355 1356
	git_commit_free(commit);
	return 0;
1357 1358
}

Michael Schubert committed
1359 1360
int git_packbuilder_insert_tree(git_packbuilder *pb, const git_oid *oid)
{
1361 1362
	int error;
	git_tree *tree = NULL;
1363
	struct tree_walk_context context = { pb, GIT_BUF_INIT };
Michael Schubert committed
1364

1365 1366 1367
	if (!(error = git_tree_lookup(&tree, pb->repo, oid)) &&
	    !(error = git_packbuilder_insert(pb, oid, NULL)))
		error = git_tree_walk(tree, GIT_TREEWALK_PRE, cb_tree_walk, &context);
Michael Schubert committed
1368 1369

	git_tree_free(tree);
1370
	git_buf_free(&context.buf);
1371
	return error;
Michael Schubert committed
1372 1373
}

1374 1375 1376 1377 1378 1379 1380 1381 1382 1383
uint32_t git_packbuilder_object_count(git_packbuilder *pb)
{
	return pb->nr_objects;
}

uint32_t git_packbuilder_written(git_packbuilder *pb)
{
	return pb->nr_written;
}

1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394
int git_packbuilder_set_callbacks(git_packbuilder *pb, git_packbuilder_progress progress_cb, void *progress_cb_payload)
{
	if (!pb)
		return -1;

	pb->progress_cb = progress_cb;
	pb->progress_cb_payload = progress_cb_payload;

	return 0;
}

Michael Schubert committed
1395 1396 1397 1398 1399
void git_packbuilder_free(git_packbuilder *pb)
{
	if (pb == NULL)
		return;

1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416
#ifdef GIT_THREADS

	git_mutex_free(&pb->cache_mutex);
	git_mutex_free(&pb->progress_mutex);
	git_cond_free(&pb->progress_cond);

#endif

	if (pb->odb)
		git_odb_free(pb->odb);

	if (pb->object_ix)
		git_oidmap_free(pb->object_ix);

	if (pb->object_list)
		git__free(pb->object_list);

1417
	git_hash_ctx_cleanup(&pb->ctx);
1418
	git_zstream_free(&pb->zstream);
1419

Michael Schubert committed
1420 1421
	git__free(pb);
}