[ViewVC] Diff of: cvs/deliantra/Deliantra-Client/DC/DB.pm

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.12 by root, Tue Jul 24 04:54:47 2007 UTC vs.
Revision 1.30 by root, Thu Dec 27 18:35:56 2007 UTC

…		…
1	=head1 NAME	1	=head1 NAME
2		2
3	CFPlus::DB - async. database and filesystem access for cfplus	3	DC::DB - async. database and filesystem access for cfplus
4		4
5	=head1 SYNOPSIS	5	=head1 SYNOPSIS
6		6
7	use CFPlus::DB;	7	use DC::DB;
8		8
9	=head1 DESCRIPTION	9	=head1 DESCRIPTION
10		10
11	=over 4	11	=over 4
12		12
13	=cut	13	=cut
14		14
15	package CFPlus::DB;	15	package DC::DB;
16		16
17	use strict;	17	use strict;
18	use utf8;	18	use utf8;
19		19
20	use Carp ();	20	use Carp ();
21	use AnyEvent ();
22	use Storable ();	21	use Storable ();
23	use Config;	22	use Config;
		23	use BDB;
24		24
25	use CFPlus;	25	use DC;
26		26
27	our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}";	27	our $DBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
		28	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
		29
		30	if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$DBDIR") {
		31	rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
		32	print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$DBDIR to $DB_HOME\n";
		33	}
		34
		35	BDB::max_poll_time 0.03;
		36
		37	our $DB_ENV;
		38	our $DB_STATE;
		39	our %DB_TABLE;
		40
		41	sub open_db {
		42	mkdir $DB_HOME, 0777;
		43
		44	$DB_ENV = db_env_create;
		45
		46	$DB_ENV->set_errfile (\*STDERR);
		47	$DB_ENV->set_msgfile (\*STDERR);
		48	$DB_ENV->set_verbose (-1, 1);
		49
		50	$DB_ENV->set_flags (BDB::AUTO_COMMIT \| BDB::LOG_AUTOREMOVE \| BDB::TXN_WRITE_NOSYNC);
		51	$DB_ENV->set_cachesize (0, 2048 * 1024, 0);
		52
		53	db_env_open $DB_ENV, $DB_HOME,
		54	BDB::CREATE \| BDB::REGISTER \| BDB::RECOVER \| BDB::INIT_MPOOL \| BDB::INIT_LOCK \| BDB::INIT_TXN,
		55	0666;
		56
		57	$! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
		58
		59	1
		60	}
		61
		62	sub table($) {
		63	$DB_TABLE{$_[0]} \|\|= do {
		64	my ($table) = @_;
		65
		66	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
		67
		68	my $db = db_create $DB_ENV;
		69	$db->set_flags (BDB::CHKSUM);
		70
		71	db_open $db, undef, $table, undef, BDB::BTREE,
		72	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
		73
		74	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
		75
		76	$db
		77	}
		78	}
		79
		80	#############################################################################
		81
		82	unless (eval { open_db }) {
		83	warn "$@";#d#
		84	eval { File::Path::rmtree $DB_HOME };
		85	open_db;
		86	}
		87
		88	our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		89
		90	our $SYNC = EV::timer_ns 0, 60, sub {
		91	$_[0]->stop;
		92	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		93	};
		94
		95	our $tilemap;
		96
		97	sub exists($$$) {
		98	my ($db, $key, $cb) = @_;
		99
		100	my $data;
		101	db_get table $db, undef, $key, $data, 0, sub {
		102	$cb->($! ? () : length $data);
		103	};
		104	}
		105
		106	sub get($$$) {
		107	my ($db, $key, $cb) = @_;
		108
		109	my $data;
		110	db_get table $db, undef, $key, $data, 0, sub {
		111	$cb->($! ? () : $data);
		112	};
		113	}
		114
		115	sub put($$$$) {
		116	my ($db, $key, $data, $cb) = @_;
		117
		118	db_put table $db, undef, $key, $data, 0, sub {
		119	$cb->($!);
		120	$SYNC->again unless $SYNC->is_active;
		121	};
		122	}
		123
		124	sub do_table {
		125	my ($db, $cb) = @_;
		126
		127	$db = table $db;
		128
		129	my $cursor = $db->cursor;
		130	my %kv;
		131
		132	for (;;) {
		133	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		134	last if $!;
		135	$kv{$k} = $v;
		136	}
		137
		138	$cb->(\%kv);
		139	}
		140
		141	sub do_get_tile_id {
		142	my ($name, $cb) = @_;
		143
		144	my $table = table "facemap";
		145	my $id;
		146
		147	db_get $table, undef, $name, $id, 0;
		148	return $cb->($id) unless $!;
		149
		150	for (1..100) {
		151	my $txn = $DB_ENV->txn_begin;
		152	db_get $table, $txn, id => $id, 0;
		153
		154	$id = 64 if $id < 64;
		155
		156	++$id;
		157
		158	db_put $table, $txn, id => $id, 0;
		159	db_txn_finish $txn;
		160
		161	$SYNC->again unless $SYNC->is_active;
		162
		163	return $cb->($id) unless $!;
		164
		165	select undef, undef, undef, 0.01 * rand;
		166	}
		167
		168	die "maximum number of transaction retries reached - database problems?";
		169	}
		170
		171	sub get_tile_id_sync($) {
		172	my ($name) = @_;
		173
		174	$tilemap->{$name} \|\|= do {
		175	my $id;
		176	do_get_tile_id $name, sub {
		177	$id = $_[0];
		178	};
		179	BDB::flush;
		180	$id
		181	}
		182	}
		183
		184	#############################################################################
28		185
29	sub path_of_res($) {	186	sub path_of_res($) {
30	utf8::downgrade $_[0]; # bug in unpack "H*"	187	utf8::downgrade $_[0]; # bug in unpack "H*"
31	"$DB_HOME/res-data-" . unpack "H*", $_[0]	188	"$DB_HOME/res-data-" . unpack "H*", $_[0]
32	}	189	}
33		190
34	sub sync {	191	sub sync {
35	# for debugging	192	# for debugging
36	#CFPlus::DB::Server::req (sync => sub { });	193	#DC::DB::Server::req (sync => sub { });
37	CFPlus::DB::Server::sync ();	194	DC::DB::Server::sync ();
38	}
39
40	sub exists($$$) {
41	CFPlus::DB::Server::req (exists => @_);
42	}
43
44	sub get($$$) {
45	CFPlus::DB::Server::req (get => @_);
46	}
47
48	sub put($$$$) {
49	CFPlus::DB::Server::req (put => @_);
50	}	195	}
51		196
52	sub unlink($$) {	197	sub unlink($$) {
53	CFPlus::DB::Server::req (unlink => @_);	198	DC::DB::Server::req (unlink => @_);
		199	}
		200
		201	sub read_file($$) {
		202	DC::DB::Server::req (read_file => @_);
54	}	203	}
55		204
56	sub write_file($$$) {	205	sub write_file($$$) {
57	CFPlus::DB::Server::req (write_file => @_);	206	DC::DB::Server::req (write_file => @_);
58	}	207	}
59		208
60	sub prefetch_file($$$) {	209	sub prefetch_file($$$) {
61	CFPlus::DB::Server::req (prefetch_file => @_);	210	DC::DB::Server::req (prefetch_file => @_);
62	}	211	}
63		212
64	our $tilemap;	213	sub logprint($$$) {
		214	DC::DB::Server::req (logprint => @_);
		215	}
65		216
66	sub get_tile_id_sync($) {	217	#############################################################################
67	my ($hash) = @_;
68		218
69	# fetch the full face table first	219	# fetch the full face table first
70	unless ($tilemap) {	220	unless ($tilemap) {
71	CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });	221	do_table facemap => sub {
72	sync;	222	$tilemap = $_[0];
		223	delete $tilemap->{id};
		224	my %maptile = reverse %$tilemap;#d#
		225	if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
		226	$tilemap = { };#d#
		227	DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		228	}#d#
73	}	229	};
74
75	$tilemap->{$hash} \|\|= do {
76	my $id;
77	CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] });
78	sync;
79	$id
80	}
81	}	230	}
82		231
83	package CFPlus::DB::Server;	232	package DC::DB::Server;
84		233
85	use strict;	234	use strict;
86		235
		236	use EV ();
87	use Fcntl;	237	use Fcntl;
88	use BerkeleyDB;
89
90	our $DB_ENV;
91	our $DB_STATE;
92	our %DB_TABLE;
93
94	sub open_db {
95	mkdir $DB_HOME, 0777;
96	my $recover = $BerkeleyDB::db_version >= 4.4
97	? eval "DB_REGISTER \| DB_RECOVER"
98	: 0;
99
100	$DB_ENV = new BerkeleyDB::Env
101	-Home => $DB_HOME,
102	-Cachesize => 8_000_000,
103	-ErrFile => "$DB_HOME/errorlog.txt",
104	# -ErrPrefix => "DATABASE",
105	-Verbose => 1,
106	-Flags => DB_CREATE \| DB_RECOVER \| DB_INIT_MPOOL \| DB_INIT_LOCK \| DB_INIT_TXN \| $recover,
107	-SetFlags => DB_AUTO_COMMIT \| DB_LOG_AUTOREMOVE,
108	or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
109
110	1
111	}
112
113	sub table($) {
114	$DB_TABLE{$_[0]} \|\|= do {
115	my ($table) = @_;
116
117	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
118
119	new BerkeleyDB::Btree
120	-Env => $DB_ENV,
121	-Filename => $table,
122	# -Filename => "database",
123	# -Subname => $table,
124	-Property => DB_CHKSUM,
125	-Flags => DB_CREATE \| DB_UPGRADE,
126	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
127	}
128	}
129
130	our $SYNC_INTERVAL = 60;
131		238
132	our %CB;	239	our %CB;
133	our $FH;	240	our $FH;
134	our $ID = "aaa0";	241	our $ID = "aaa0";
135	our ($fh_r_watcher, $fh_w_watcher);	242	our ($fh_r_watcher, $fh_w_watcher);
140	sub fh_write {	247	sub fh_write {
141	my $len = syswrite $FH, $write_buf;	248	my $len = syswrite $FH, $write_buf;
142		249
143	substr $write_buf, 0, $len, "";	250	substr $write_buf, 0, $len, "";
144		251
145	undef $fh_w_watcher	252	$fh_w_watcher->stop
146	unless length $write_buf;	253	unless length $write_buf;
147	}	254	}
148		255
149	sub fh_read {	256	sub fh_read {
150	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	257	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
186		293
187	my $id = ++$ID;	294	my $id = ++$ID;
188	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	295	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
189	$CB{$id} = $cb;	296	$CB{$id} = $cb;
190		297
191	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	298	$fh_w_watcher->start;
192	}
193
194	sub sync_tick {
195	req "sync", sub { };
196	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
197	}
198
199	sub do_sync {
200	$DB_ENV->txn_checkpoint (0, 0, 0);
201	()
202	}
203
204	sub do_exists {
205	my ($db, $key) = @_;
206
207	utf8::downgrade $key;
208	my $data;
209	(table $db)->db_get ($key, $data) == 0
210	? length $data
211	: ()
212	}
213
214	sub do_get {
215	my ($db, $key) = @_;
216
217	utf8::downgrade $key;
218	my $data;
219	(table $db)->db_get ($key, $data) == 0
220	? $data
221	: ()
222	}
223
224	sub do_put {
225	my ($db, $key, $data) = @_;
226
227	utf8::downgrade $key;
228	utf8::downgrade $data;
229	(table $db)->db_put ($key => $data)
230	}
231
232	sub do_table {
233	my ($db) = @_;
234
235	$db = table $db;
236
237	my $cursor = $db->db_cursor;
238	my %kv;
239	my ($k, $v);
240	$kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
241
242	\%kv
243	}
244
245	sub do_get_tile_id {
246	my ($hash) = @_;
247
248	my $id;
249	my $table = table "facemap";
250
251	return $id
252	if $table->db_get ($hash, $id) == 0;
253
254	for (1..100) {
255	my $txn = $DB_ENV->txn_begin;
256	my $status = $table->db_get (id => $id);
257	if ($status == 0 \|\| $status == BerkeleyDB::DB_NOTFOUND) {
258	$id = ($id \|\| 64) + 1;
259	if ($table->db_put (id => $id) == 0
260	&& $table->db_put ($hash => $id) == 0) {
261	$txn->txn_commit;
262
263	return $id;
264	}
265	}
266	$txn->txn_abort;
267	}
268
269	die "maximum number of transaction retries reached - database problems?";
270	}	299	}
271		300
272	sub do_unlink {	301	sub do_unlink {
273	unlink $_[0];	302	unlink $_[0];
274	}	303	}
275		304
		305	sub do_read_file {
		306	my ($path) = @_;
		307
		308	utf8::downgrade $path;
		309	open my $fh, "<:raw", $path
		310	or return;
		311	sysread $fh, my $buf, -s $fh;
		312
		313	$buf
		314	}
		315
276	sub do_write_file {	316	sub do_write_file {
277	my ($file, $data) = @_;	317	my ($path, $data) = @_;
278		318
279	utf8::downgrade $file;	319	utf8::downgrade $path;
280	utf8::downgrade $data;	320	utf8::downgrade $data;
281	open my $fh, ">:raw", $file	321	open my $fh, ">:raw", $path
282	or return;	322	or return;
283	print $fh $data;	323	syswrite $fh, $data;
284	close $fh;	324	close $fh;
285		325
286	1	326	1
287	}	327	}
288		328
289	sub do_prefetch_file {	329	sub do_prefetch_file {
290	my ($file, $size) = @_;	330	my ($path, $size) = @_;
291		331
292	utf8::downgrade $file;	332	utf8::downgrade $path;
293	open my $fh, "<:raw", $file	333	open my $fh, "<:raw", $path
294	or return;	334	or return;
295	sysread $fh, my $buf, $size;	335	sysread $fh, my $buf, $size;
296		336
297	1	337	1
298	}	338	}
299		339
		340	our %LOG_FH;
		341
		342	sub do_logprint {
		343	my ($path, $line) = @_;
		344
		345	$LOG_FH{$path} \|\|= do {
		346	open my $fh, ">>:utf8", $path
		347	or warn "Couldn't open logfile $path: $!";
		348
		349	$fh->autoflush (1);
		350
		351	$fh
		352	};
		353
		354	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		355
		356	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		357	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		358
		359	print { $LOG_FH{$path} } "$ts $line\n"
		360	}
		361
300	sub run {	362	sub run {
301	($FH, my $fh) = CFPlus::socketpipe;	363	($FH, my $fh) = DC::socketpipe;
302		364
303	my $oldfh = select $FH; $\| = 1; select $oldfh;	365	my $oldfh = select $FH; $\| = 1; select $oldfh;
304	my $oldfh = select $fh; $\| = 1; select $oldfh;	366	my $oldfh = select $fh; $\| = 1; select $oldfh;
305		367
306	my $pid = fork;	368	my $pid = fork;
307		369
308	if (defined $pid && !$pid) {	370	if (defined $pid && !$pid) {
		371	local $SIG{QUIT} = "IGNORE";
309	local $SIG{__DIE__};	372	local $SIG{__DIE__};
		373	local $SIG{__WARN__};
310	eval {	374	eval {
311	close $FH;	375	close $FH;
312
313	unless (eval { open_db }) {
314	eval { File::Path::rmtree $DB_HOME };
315	open_db;
316	}
317		376
318	while () {	377	while () {
319	4 == read $fh, my $len, 4	378	4 == read $fh, my $len, 4
320	or last;	379	or last;
321	$len = unpack "N", $len;	380	$len = unpack "N", $len;
…		…
323	or die "unexpected eof while reading request";	382	or die "unexpected eof while reading request";
324		383
325	$req = Storable::thaw $req;	384	$req = Storable::thaw $req;
326		385
327	my ($id, $type, @args) = @$req;	386	my ($id, $type, @args) = @$req;
328	my $cb = CFPlus::DB::Server->can ("do_$type")	387	my $cb = DC::DB::Server->can ("do_$type")
329	or die "$type: unknown database request type\n";	388	or die "$type: unknown database request type\n";
330	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	389	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
331	(syswrite $fh, $res) == length $res	390	(syswrite $fh, $res) == length $res
332	or die;	391	or die "DB::write: $!";
333	}	392	}
334	};	393	};
335		394
336	my $error = $@;	395	my $error = $@;
337		396
338	eval {	397	eval {
339	undef %DB_TABLE;
340	undef $DB_ENV;
341
342	Storable::store_fd [die => $error], $fh;	398	Storable::store_fd [die => $error], $fh;
343	};	399	};
344		400
		401	warn $error
		402	if $error;
		403
345	CFPlus::_exit 0;	404	DC::_exit 0;
346	}	405	}
347		406
348	close $fh;	407	close $fh;
349	CFPlus::fh_nonblocking $FH, 1;	408	DC::fh_nonblocking $FH, 1;
350		409
351	$CB{die} = sub { die shift };	410	$CB{die} = sub { die shift };
352		411
353	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	412	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
354		413	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
355	sync_tick;
356	}	414	}
357		415
358	sub stop {	416	sub stop {
359	close $FH;	417	close $FH;
360	}	418	}

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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents): Revision 1.12 by root, Tue Jul 24 04:54:47 2007 UTC vs. Revision 1.30 by root, Thu Dec 27 18:35:56 2007 UTC

Diff Legend

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.12 by root, Tue Jul 24 04:54:47 2007 UTC vs.
Revision 1.30 by root, Thu Dec 27 18:35:56 2007 UTC