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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.23 by root, Fri Nov 16 04:54:25 2007 UTC vs.
Revision 1.32 by root, Sat Jan 19 04:49:37 2008 UTC

1=head1 NAME 1=head1 NAME
2 2
3CFPlus::DB - async. database and filesystem access for cfplus 3DC::DB - async. database and filesystem access for deliantra
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
15package CFPlus::DB; 15package DC::DB;
16 16
17use strict; 17use strict;
18use utf8; 18use utf8;
19 19
20use Carp (); 20use Carp ();
21use Storable (); 21use Storable ();
22use Config; 22use Config;
23use BDB;
23 24
24use CFPlus; 25use DC;
25 26
26our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}"; 27our $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
28our $DBDIR = "client-" . BDB::VERSION . "-$Config{archname}";
29our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
30
31if (!-e $DB_HOME and -e "$Deliantra::VARDIR/$ODBDIR") {
32 rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
33 print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
34}
35
36if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$ODBDIR") {
37 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
38 print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
39}
40
41BDB::max_poll_time 0.03;
42BDB::max_parallel 1;
43
44our $DB_ENV;
45our $DB_STATE;
46our %DB_TABLE;
47
48sub open_db {
49 mkdir $DB_HOME, 0777;
50
51 $DB_ENV = db_env_create;
52
53 $DB_ENV->set_errfile (\*STDERR);
54 $DB_ENV->set_msgfile (\*STDERR);
55 $DB_ENV->set_verbose (-1, 1);
56
57 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC);
58 $DB_ENV->set_cachesize (0, 2048 * 1024, 0);
59
60 db_env_open $DB_ENV, $DB_HOME,
61 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
62 0666;
63
64 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
65
66 1
67}
68
69sub table($) {
70 $DB_TABLE{$_[0]} ||= do {
71 my ($table) = @_;
72
73 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
74
75 my $db = db_create $DB_ENV;
76 $db->set_flags (BDB::CHKSUM);
77
78 db_open $db, undef, $table, undef, BDB::BTREE,
79 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
80
81 $! and "unable to open/create database table $_[0]: ". BDB::strerror;
82
83 $db
84 }
85}
86
87#############################################################################
88
89unless (eval { open_db }) {
90 warn "$@";#d#
91 eval { File::Path::rmtree $DB_HOME };
92 open_db;
93}
94
95our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
96
97our $SYNC = EV::timer_ns 0, 60, sub {
98 $_[0]->stop;
99 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
100};
101
102our $tilemap;
103
104sub exists($$$) {
105 my ($db, $key, $cb) = @_;
106
107 my $data;
108 db_get table $db, undef, $key, $data, 0, sub {
109 $cb->($! ? () : length $data);
110 };
111}
112
113sub get($$$) {
114 my ($db, $key, $cb) = @_;
115
116 my $data;
117 db_get table $db, undef, $key, $data, 0, sub {
118 $cb->($! ? () : $data);
119 };
120}
121
122sub put($$$$) {
123 my ($db, $key, $data, $cb) = @_;
124
125 db_put table $db, undef, $key, $data, 0, sub {
126 $cb->($!);
127 $SYNC->again unless $SYNC->is_active;
128 };
129}
130
131sub do_table {
132 my ($db, $cb) = @_;
133
134 $db = table $db;
135
136 my $cursor = $db->cursor;
137 my %kv;
138
139 for (;;) {
140 db_c_get $cursor, my $k, my $v, BDB::NEXT;
141 last if $!;
142 $kv{$k} = $v;
143 }
144
145 $cb->(\%kv);
146}
147
148sub do_get_tile_id {
149 my ($name, $cb) = @_;
150
151 my $table = table "facemap";
152 my $id;
153
154 db_get $table, undef, $name, $id, 0;
155 return $cb->($id) unless $!;
156
157 for (1..100) {
158 my $txn = $DB_ENV->txn_begin;
159 db_get $table, $txn, id => $id, 0;
160
161 $id = 64 if $id < 64;
162
163 ++$id;
164
165 db_put $table, $txn, id => $id, 0;
166 db_txn_finish $txn;
167
168 $SYNC->again unless $SYNC->is_active;
169
170 return $cb->($id) unless $!;
171
172 select undef, undef, undef, 0.01 * rand;
173 }
174
175 die "maximum number of transaction retries reached - database problems?";
176}
177
178sub get_tile_id_sync($) {
179 my ($name) = @_;
180
181 $tilemap->{$name} ||= do {
182 my $id;
183 do_get_tile_id $name, sub {
184 $id = $_[0];
185 };
186 BDB::flush;
187 $id
188 }
189}
190
191#############################################################################
27 192
28sub path_of_res($) { 193sub path_of_res($) {
29 utf8::downgrade $_[0]; # bug in unpack "H*" 194 utf8::downgrade $_[0]; # bug in unpack "H*"
30 "$DB_HOME/res-data-" . unpack "H*", $_[0] 195 "$DB_HOME/res-data-" . unpack "H*", $_[0]
31} 196}
32 197
33sub sync { 198sub sync {
34 # for debugging 199 # for debugging
35 #CFPlus::DB::Server::req (sync => sub { }); 200 #DC::DB::Server::req (sync => sub { });
36 CFPlus::DB::Server::sync (); 201 DC::DB::Server::sync ();
37}
38
39sub exists($$$) {
40 CFPlus::DB::Server::req (exists => @_);
41}
42
43sub get($$$) {
44 CFPlus::DB::Server::req (get => @_);
45}
46
47sub put($$$$) {
48 CFPlus::DB::Server::req (put => @_);
49} 202}
50 203
51sub unlink($$) { 204sub unlink($$) {
52 CFPlus::DB::Server::req (unlink => @_); 205 DC::DB::Server::req (unlink => @_);
53} 206}
54 207
55sub read_file($$) { 208sub read_file($$) {
56 CFPlus::DB::Server::req (read_file => @_); 209 DC::DB::Server::req (read_file => @_);
57} 210}
58 211
59sub write_file($$$) { 212sub write_file($$$) {
60 CFPlus::DB::Server::req (write_file => @_); 213 DC::DB::Server::req (write_file => @_);
61} 214}
62 215
63sub prefetch_file($$$) { 216sub prefetch_file($$$) {
64 CFPlus::DB::Server::req (prefetch_file => @_); 217 DC::DB::Server::req (prefetch_file => @_);
65} 218}
66 219
67sub logprint($$$) { 220sub logprint($$$) {
68 CFPlus::DB::Server::req (logprint => @_); 221 DC::DB::Server::req (logprint => @_);
69} 222}
70 223
71our $tilemap; 224#############################################################################
72 225
73sub get_tile_id_sync($) {
74 my ($name) = @_;
75
76 # fetch the full face table first 226# fetch the full face table first
77 unless ($tilemap) { 227unless ($tilemap) {
78 CFPlus::DB::Server::req (table => facemap => sub { 228 do_table facemap => sub {
79 $tilemap = $_[0]; 229 $tilemap = $_[0];
80 delete $tilemap->{id}; 230 delete $tilemap->{id};
81 my %maptile = reverse %$tilemap;#d# 231 my %maptile = reverse %$tilemap;#d#
82 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d# 232 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
83 $tilemap = { };#d# 233 $tilemap = { };#d#
84 CFPlus::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d# 234 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
85 }#d# 235 }#d#
86 });
87 sync;
88 } 236 };
89
90 $tilemap->{$name} ||= do {
91 my $id;
92 CFPlus::DB::Server::req (get_tile_id => $name, sub { $id = $_[0] });
93 sync;
94 $id
95 }
96} 237}
97 238
98package CFPlus::DB::Server; 239package DC::DB::Server;
99 240
100use strict; 241use strict;
101 242
102use EV (); 243use EV ();
103use Fcntl; 244use Fcntl;
104use BerkeleyDB;
105
106our $DB_ENV;
107our $DB_STATE;
108our %DB_TABLE;
109
110sub open_db {
111 mkdir $DB_HOME, 0777;
112 my $recover = $BerkeleyDB::db_version >= 4.4
113 ? eval "DB_REGISTER | DB_RECOVER"
114 : 0;
115
116 $DB_ENV = new BerkeleyDB::Env
117 -Home => $DB_HOME,
118 -Cachesize => 8_000_000,
119 -ErrFile => "$DB_HOME/errorlog.txt",
120# -ErrPrefix => "DATABASE",
121 -Verbose => 1,
122 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
123 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE | DB_TXN_WRITE_NOSYNC,
124 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
125
126 1
127}
128
129sub table($) {
130 $DB_TABLE{$_[0]} ||= do {
131 my ($table) = @_;
132
133 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
134
135 new BerkeleyDB::Btree
136 -Env => $DB_ENV,
137 -Filename => $table,
138# -Filename => "database",
139# -Subname => $table,
140 -Property => DB_CHKSUM,
141 -Flags => DB_AUTO_COMMIT | DB_CREATE | DB_UPGRADE,
142 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
143 }
144}
145 245
146our %CB; 246our %CB;
147our $FH; 247our $FH;
148our $ID = "aaa0"; 248our $ID = "aaa0";
149our ($fh_r_watcher, $fh_w_watcher); 249our ($fh_r_watcher, $fh_w_watcher);
150our $sync_timer; 250our $sync_timer;
151our $write_buf; 251our $write_buf;
152our $read_buf; 252our $read_buf;
153 253
154our $SYNC = EV::timer_ns 0, 60, sub {
155 $_[0]->stop;
156 CFPlus::DB::Server::req (sync => sub { });
157};
158
159sub fh_write { 254sub fh_write {
160 my $len = syswrite $FH, $write_buf; 255 my $len = syswrite $FH, $write_buf;
161 256
162 substr $write_buf, 0, $len, ""; 257 substr $write_buf, 0, $len, "";
163 258
… …
206 my $id = ++$ID; 301 my $id = ++$ID;
207 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 302 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
208 $CB{$id} = $cb; 303 $CB{$id} = $cb;
209 304
210 $fh_w_watcher->start; 305 $fh_w_watcher->start;
211 $SYNC->again unless $SYNC->is_active;
212}
213
214sub do_sync {
215 $DB_ENV->txn_checkpoint (0, 0, 0);
216 ()
217}
218
219sub do_exists {
220 my ($db, $key) = @_;
221
222 utf8::downgrade $key;
223 my $data;
224 (table $db)->db_get ($key, $data) == 0
225 ? length $data
226 : ()
227}
228
229sub do_get {
230 my ($db, $key) = @_;
231
232 utf8::downgrade $key;
233 my $data;
234 (table $db)->db_get ($key, $data) == 0
235 ? $data
236 : ()
237}
238
239sub do_put {
240 my ($db, $key, $data) = @_;
241
242 utf8::downgrade $key;
243 utf8::downgrade $data;
244 (table $db)->db_put ($key => $data)
245}
246
247sub do_table {
248 my ($db) = @_;
249
250 $db = table $db;
251
252 my $cursor = $db->db_cursor;
253 my %kv;
254 my ($k, $v);
255 $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
256
257 \%kv
258}
259
260sub do_get_tile_id {
261 my ($name) = @_;
262
263 my $id;
264 my $table = table "facemap";
265
266 return $id
267 if $table->db_get ($name, $id) == 0;
268
269 for (1..100) {
270 my $txn = $DB_ENV->txn_begin;
271 my $status = $table->db_get (id => $id);
272 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
273 $id = ($id || 64) + 1;
274 if ($table->db_put (id => $id) == 0
275 && $table->db_put ($name => $id) == 0) {
276 $txn->txn_commit;
277
278 return $id;
279 }
280 }
281 $txn->txn_abort;
282 select undef, undef, undef, 0.01 * rand;
283 }
284
285 die "maximum number of transaction retries reached - database problems?";
286} 306}
287 307
288sub do_unlink { 308sub do_unlink {
289 unlink $_[0]; 309 unlink $_[0];
290} 310}
… …
345 365
346 print { $LOG_FH{$path} } "$ts $line\n" 366 print { $LOG_FH{$path} } "$ts $line\n"
347} 367}
348 368
349sub run { 369sub run {
350 ($FH, my $fh) = CFPlus::socketpipe; 370 ($FH, my $fh) = DC::socketpipe;
351 371
352 my $oldfh = select $FH; $| = 1; select $oldfh; 372 my $oldfh = select $FH; $| = 1; select $oldfh;
353 my $oldfh = select $fh; $| = 1; select $oldfh; 373 my $oldfh = select $fh; $| = 1; select $oldfh;
354 374
355 my $pid = fork; 375 my $pid = fork;
356 376
357 if (defined $pid && !$pid) { 377 if (defined $pid && !$pid) {
358 local $SIG{QUIT}; 378 local $SIG{QUIT} = "IGNORE";
359 local $SIG{__DIE__}; 379 local $SIG{__DIE__};
360 local $SIG{__WARN__}; 380 local $SIG{__WARN__};
361 eval { 381 eval {
362 close $FH; 382 close $FH;
363
364 unless (eval { open_db }) {
365 eval { File::Path::rmtree $DB_HOME };
366 open_db;
367 }
368 383
369 while () { 384 while () {
370 4 == read $fh, my $len, 4 385 4 == read $fh, my $len, 4
371 or last; 386 or last;
372 $len = unpack "N", $len; 387 $len = unpack "N", $len;
… …
374 or die "unexpected eof while reading request"; 389 or die "unexpected eof while reading request";
375 390
376 $req = Storable::thaw $req; 391 $req = Storable::thaw $req;
377 392
378 my ($id, $type, @args) = @$req; 393 my ($id, $type, @args) = @$req;
379 my $cb = CFPlus::DB::Server->can ("do_$type") 394 my $cb = DC::DB::Server->can ("do_$type")
380 or die "$type: unknown database request type\n"; 395 or die "$type: unknown database request type\n";
381 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 396 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
382 (syswrite $fh, $res) == length $res 397 (syswrite $fh, $res) == length $res
383 or die "DB::write: $!"; 398 or die "DB::write: $!";
384 } 399 }
385 }; 400 };
386 401
387 my $error = $@; 402 my $error = $@;
388 403
389 eval { 404 eval {
390 $DB_ENV->txn_checkpoint (0, 0, 0);
391
392 undef %DB_TABLE;
393 undef $DB_ENV;
394
395 Storable::store_fd [die => $error], $fh; 405 Storable::store_fd [die => $error], $fh;
396 }; 406 };
397 407
408 warn $error
409 if $error;
410
398 CFPlus::_exit 0; 411 DC::_exit 0;
399 } 412 }
400 413
401 close $fh; 414 close $fh;
402 CFPlus::fh_nonblocking $FH, 1; 415 DC::fh_nonblocking $FH, 1;
403 416
404 $CB{die} = sub { die shift }; 417 $CB{die} = sub { die shift };
405 418
406 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; 419 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
407 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; 420 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
408 $SYNC->again unless $SYNC->is_active;
409} 421}
410 422
411sub stop { 423sub stop {
412 close $FH; 424 close $FH;
413} 425}

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