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

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.6 by root, Mon Apr 16 21:06:37 2007 UTC vs.
Revision 1.25 by root, Tue Dec 11 03:38:36 2007 UTC

…		…
1	=head1 NAME	1	=head1 NAME
2		2
3	CFPlus::DB - async. database access for cfplus	3	CFPlus::DB - async. database and filesystem access for cfplus
4		4
5	=head1 SYNOPSIS	5	=head1 SYNOPSIS
6		6
7	use CFPlus::DB;	7	use CFPlus::DB;
8		8
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 ();
		22	use Config;
		23	use BDB;
23		24
24	use CFPlus;	25	use CFPlus;
		26
		27	our $DB_HOME = "$Crossfire::VARDIR/cfplus-" . BDB::VERSION . "-$Config{archname}";
		28
		29	our $DB_ENV;
		30	our $DB_STATE;
		31	our %DB_TABLE;
		32
		33	sub open_db {
		34	mkdir $DB_HOME, 0777;
		35
		36	$DB_ENV = db_env_create;
		37
		38	$DB_ENV->set_errfile (\*STDERR);
		39	$DB_ENV->set_msgfile (\*STDERR);
		40	$DB_ENV->set_verbose (-1, 1);
		41
		42	$DB_ENV->set_flags (BDB::AUTO_COMMIT \| BDB::LOG_AUTOREMOVE \| BDB::TXN_WRITE_NOSYNC);
		43	$DB_ENV->set_cachesize (0, 2048 * 1024, 0);
		44
		45	db_env_open $DB_ENV, $DB_HOME,
		46	BDB::CREATE \| BDB::REGISTER \| BDB::RECOVER \| BDB::INIT_MPOOL \| BDB::INIT_LOCK \| BDB::INIT_TXN,
		47	0666;
		48
		49	$! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
		50
		51	1
		52	}
		53
		54	sub table($) {
		55	$DB_TABLE{$_[0]} \|\|= do {
		56	my ($table) = @_;
		57
		58	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
		59
		60	my $db = db_create $DB_ENV;
		61	$db->set_flags (BDB::CHKSUM);
		62
		63	db_open $db, undef, $table, undef, BDB::BTREE,
		64	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
		65
		66	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
		67
		68	$db
		69	}
		70	}
		71
		72	#############################################################################
		73
		74	unless (eval { open_db }) {
		75	warn "$@";#d#
		76	eval { File::Path::rmtree $DB_HOME };
		77	open_db;
		78	}
		79
		80	our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		81
		82	our $SYNC = EV::timer_ns 0, 60, sub {
		83	$_[0]->stop;
		84	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		85	};
		86
		87	our $tilemap;
		88
		89	sub exists($$$) {
		90	my ($db, $key, $cb) = @_;
		91
		92	my $data;
		93	db_get table $db, undef, $key, $data, 0, sub {
		94	$cb->($! ? () : length $data);
		95	};
		96	}
		97
		98	sub get($$$) {
		99	my ($db, $key, $cb) = @_;
		100
		101	my $data;
		102	db_get table $db, undef, $key, $data, 0, sub {
		103	$cb->($! ? () : $data);
		104	};
		105	}
		106
		107	sub put($$$$) {
		108	my ($db, $key, $data, $cb) = @_;
		109
		110	db_put table $db, undef, $key, $data, 0, sub {
		111	$cb->($!);
		112	$SYNC->again unless $SYNC->is_active;
		113	};
		114	}
		115
		116	sub do_table {
		117	my ($db, $cb) = @_;
		118
		119	$db = table $db;
		120
		121	my $cursor = $db->cursor;
		122	my %kv;
		123
		124	for (;;) {
		125	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		126	last if $!;
		127	$kv{$k} = $v;
		128	}
		129
		130	$cb->(\%kv);
		131	}
		132
		133	sub do_get_tile_id {
		134	my ($name, $cb) = @_;
		135
		136	my $table = table "facemap";
		137	my $id;
		138
		139	db_get $table, undef, $name, $id, 0;
		140	return $cb->($id) unless $!;
		141
		142	for (1..100) {
		143	my $txn = $DB_ENV->txn_begin;
		144	db_get $table, $txn, id => $id, 0;
		145
		146	$id = 64 if $id < 64;
		147
		148	++$id;
		149
		150	db_put $table, $txn, id => $id, 0;
		151	db_txn_finish $txn;
		152
		153	$SYNC->again unless $SYNC->is_active;
		154
		155	return $cb->($id) unless $!;
		156
		157	select undef, undef, undef, 0.01 * rand;
		158	}
		159
		160	die "maximum number of transaction retries reached - database problems?";
		161	}
		162
		163	sub get_tile_id_sync($) {
		164	my ($name) = @_;
		165
		166	# fetch the full face table first
		167	unless ($tilemap) {
		168	do_table facemap => sub {
		169	$tilemap = $_[0];
		170	delete $tilemap->{id};
		171	my %maptile = reverse %$tilemap;#d#
		172	if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
		173	$tilemap = { };#d#
		174	CFPlus::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		175	}#d#
		176	};
		177	BDB::flush;
		178	}
		179
		180	$tilemap->{$name} \|\|= do {
		181	my $id;
		182	do_get_tile_id $name, sub {
		183	$id = $_[0];
		184	};
		185	BDB::flush;
		186	$id
		187	}
		188	}
		189
		190	#############################################################################
		191
		192	sub path_of_res($) {
		193	utf8::downgrade $_[0]; # bug in unpack "H*"
		194	"$DB_HOME/res-data-" . unpack "H*", $_[0]
		195	}
25		196
26	sub sync {	197	sub sync {
27	# for debugging	198	# for debugging
28	#CFPlus::DB::Server::req (sync => sub { });	199	#CFPlus::DB::Server::req (sync => sub { });
29	CFPlus::DB::Server::sync ();	200	CFPlus::DB::Server::sync ();
30	}	201	}
31		202
		203	sub unlink($$) {
		204	CFPlus::DB::Server::req (unlink => @_);
		205	}
		206
		207	sub read_file($$) {
		208	CFPlus::DB::Server::req (read_file => @_);
		209	}
		210
		211	sub write_file($$$) {
		212	CFPlus::DB::Server::req (write_file => @_);
		213	}
		214
		215	sub prefetch_file($$$) {
		216	CFPlus::DB::Server::req (prefetch_file => @_);
		217	}
		218
32	sub get($$$) {	219	sub logprint($$$) {
33	CFPlus::DB::Server::req (get => @_);	220	CFPlus::DB::Server::req (logprint => @_);
34	}
35
36	sub put($$$$) {
37	CFPlus::DB::Server::req (put => @_);
38	}
39
40	our $tilemap;
41
42	sub get_tile_id_sync($) {
43	my ($hash) = @_;
44
45	# fetch the full face table first
46	unless ($tilemap) {
47	CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });
48	sync;
49	}
50
51	$tilemap->{$hash} \|\|= do {
52	my $id;
53	CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] });
54	sync;
55	$id
56	}
57	}	221	}
58		222
59	package CFPlus::DB::Server;	223	package CFPlus::DB::Server;
60		224
61	use strict;	225	use strict;
62		226
		227	use EV ();
63	use Fcntl;	228	use Fcntl;
64	use BerkeleyDB;
65
66	our $DB_HOME = "$Crossfire::VARDIR/cfplus";
67	our $DB_ENV;
68	our $DB_STATE;
69	our %DB_TABLE;
70
71	sub open_db {
72	mkdir $DB_HOME, 0777;
73	my $recover = $BerkeleyDB::db_version >= 4.4
74	? eval "DB_REGISTER \| DB_RECOVER"
75	: 0;
76
77	$DB_ENV = new BerkeleyDB::Env
78	-Home => $DB_HOME,
79	-Cachesize => 8_000_000,
80	-ErrFile => "$DB_HOME/errorlog.txt",
81	# -ErrPrefix => "DATABASE",
82	-Verbose => 1,
83	-Flags => DB_CREATE \| DB_RECOVER \| DB_INIT_MPOOL \| DB_INIT_LOCK \| DB_INIT_TXN \| $recover,
84	-SetFlags => DB_AUTO_COMMIT \| DB_LOG_AUTOREMOVE,
85	or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
86
87	1
88	}
89
90	sub table($) {
91	$DB_TABLE{$_[0]} \|\|= do {
92	my ($table) = @_;
93
94	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
95
96	new BerkeleyDB::Btree
97	-Env => $DB_ENV,
98	-Filename => $table,
99	# -Filename => "database",
100	# -Subname => $table,
101	-Property => DB_CHKSUM,
102	-Flags => DB_CREATE \| DB_UPGRADE,
103	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
104	}
105	}
106
107	our $SYNC_INTERVAL = 60;
108		229
109	our %CB;	230	our %CB;
110	our $FH;	231	our $FH;
111	our $ID = "aaa0";	232	our $ID = "aaa0";
112	our ($fh_r_watcher, $fh_w_watcher);	233	our ($fh_r_watcher, $fh_w_watcher);
…		…
117	sub fh_write {	238	sub fh_write {
118	my $len = syswrite $FH, $write_buf;	239	my $len = syswrite $FH, $write_buf;
119		240
120	substr $write_buf, 0, $len, "";	241	substr $write_buf, 0, $len, "";
121		242
122	undef $fh_w_watcher	243	$fh_w_watcher->stop
123	unless length $write_buf;	244	unless length $write_buf;
124	}	245	}
125		246
126	sub fh_read {	247	sub fh_read {
127	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	248	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
163		284
164	my $id = ++$ID;	285	my $id = ++$ID;
165	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	286	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
166	$CB{$id} = $cb;	287	$CB{$id} = $cb;
167		288
168	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	289	$fh_w_watcher->start;
169	}	290	}
170		291
171	sub sync_tick {	292	sub do_unlink {
172	req "sync", sub { };	293	unlink $_[0];
173	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
174	}	294	}
175		295
176	sub do_sync {	296	sub do_read_file {
177	$DB_ENV->txn_checkpoint (0, 0, 0);	297	my ($path) = @_;
178	()
179	}
180		298
181	sub do_get {
182	my ($db, $key) = @_;
183
184	utf8::downgrade $key;	299	utf8::downgrade $path;
185	my $data;	300	open my $fh, "<:raw", $path
186	(table $db)->db_get ($key, $data) == 0	301	or return;
187	? $data	302	sysread $fh, my $buf, -s $fh;
188	: ()
189	}
190		303
191	sub do_put {	304	$buf
		305	}
		306
		307	sub do_write_file {
192	my ($db, $key, $data) = @_;	308	my ($path, $data) = @_;
193		309
194	utf8::downgrade $key;	310	utf8::downgrade $path;
195	utf8::downgrade $data;	311	utf8::downgrade $data;
196	(table $db)->db_put ($key => $data)	312	open my $fh, ">:raw", $path
197	}	313	or return;
		314	syswrite $fh, $data;
		315	close $fh;
198		316
199	sub do_table {	317	1
200	my ($db) = @_;
201
202	$db = table $db;
203
204	my $cursor = $db->db_cursor;
205	my %kv;
206	my ($k, $v);
207	$kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
208
209	\%kv
210	}	318	}
211		319
212	sub do_get_tile_id {	320	sub do_prefetch_file {
213	my ($hash) = @_;	321	my ($path, $size) = @_;
214		322
215	my $id;	323	utf8::downgrade $path;
216	my $table = table "facemap";	324	open my $fh, "<:raw", $path
		325	or return;
		326	sysread $fh, my $buf, $size;
217		327
218	return $id	328	1
219	if $table->db_get ($hash, $id) == 0;	329	}
220		330
221	for (1..100) {	331	our %LOG_FH;
222	my $txn = $DB_ENV->txn_begin;
223	my $status = $table->db_get (id => $id);
224	if ($status == 0 \|\| $status == BerkeleyDB::DB_NOTFOUND) {
225	$id = ($id \|\| 64) + 1;
226	if ($table->db_put (id => $id) == 0
227	&& $table->db_put ($hash => $id) == 0) {
228	$txn->txn_commit;
229		332
230	return $id;	333	sub do_logprint {
231	}	334	my ($path, $line) = @_;
		335
		336	$LOG_FH{$path} \|\|= do {
		337	open my $fh, ">>:utf8", $path
		338	or warn "Couldn't open logfile $path: $!";
		339
		340	$fh->autoflush (1);
		341
232	}	342	$fh
233	$txn->txn_abort;
234	}	343	};
235		344
236	die "maximum number of transaction retries reached - database problems?";	345	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		346
		347	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		348	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		349
		350	print { $LOG_FH{$path} } "$ts $line\n"
237	}	351	}
238		352
239	sub run {	353	sub run {
240	($FH, my $fh) = CFPlus::socketpipe;	354	($FH, my $fh) = CFPlus::socketpipe;
241		355
…		…
243	my $oldfh = select $fh; $\| = 1; select $oldfh;	357	my $oldfh = select $fh; $\| = 1; select $oldfh;
244		358
245	my $pid = fork;	359	my $pid = fork;
246		360
247	if (defined $pid && !$pid) {	361	if (defined $pid && !$pid) {
		362	local $SIG{QUIT};
248	local $SIG{__DIE__};	363	local $SIG{__DIE__};
		364	local $SIG{__WARN__};
249	eval {	365	eval {
250	close $FH;	366	close $FH;
251
252	unless (eval { open_db }) {
253	eval { File::Path::rmtree $DB_HOME };
254	open_db;
255	}
256		367
257	while () {	368	while () {
258	4 == read $fh, my $len, 4	369	4 == read $fh, my $len, 4
259	or last;	370	or last;
260	$len = unpack "N", $len;	371	$len = unpack "N", $len;
…		…
266	my ($id, $type, @args) = @$req;	377	my ($id, $type, @args) = @$req;
267	my $cb = CFPlus::DB::Server->can ("do_$type")	378	my $cb = CFPlus::DB::Server->can ("do_$type")
268	or die "$type: unknown database request type\n";	379	or die "$type: unknown database request type\n";
269	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	380	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
270	(syswrite $fh, $res) == length $res	381	(syswrite $fh, $res) == length $res
271	or die;	382	or die "DB::write: $!";
272	}	383	}
273	};	384	};
274		385
275	my $error = $@;	386	my $error = $@;
276		387
277	eval {	388	eval {
278	undef %DB_TABLE;
279	undef $DB_ENV;
280
281	Storable::store_fd [die => $error], $fh;	389	Storable::store_fd [die => $error], $fh;
282	};	390	};
283		391
		392	warn $error
		393	if $error;
		394
284	CFPlus::_exit 0;	395	CFPlus::_exit 0;
285	}	396	}
286		397
287	close $fh;	398	close $fh;
288	CFPlus::fh_nonblocking $FH, 1;	399	CFPlus::fh_nonblocking $FH, 1;
289		400
290	$CB{die} = sub { die shift };	401	$CB{die} = sub { die shift };
291		402
292	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	403	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
293		404	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
294	sync_tick;
295	}	405	}
296		406
297	sub stop {	407	sub stop {
298	close $FH;	408	close $FH;
299	}	409	}

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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents): Revision 1.6 by root, Mon Apr 16 21:06:37 2007 UTC vs. Revision 1.25 by root, Tue Dec 11 03:38:36 2007 UTC

Diff Legend

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.6 by root, Mon Apr 16 21:06:37 2007 UTC vs.
Revision 1.25 by root, Tue Dec 11 03:38:36 2007 UTC