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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.19 by root, Mon Aug 20 16:16:06 2007 UTC vs.
Revision 1.25 by root, Tue Dec 11 03:38:36 2007 UTC

… …
18use utf8; 18use utf8;
19 19
20use Carp (); 20use Carp ();
21use Storable (); 21use Storable ();
22use Config; 22use Config;
23use Event (); 23use BDB;
24 24
25use CFPlus; 25use CFPlus;
26 26
27our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}"; 27our $DB_HOME = "$Crossfire::VARDIR/cfplus-" . BDB::VERSION . "-$Config{archname}";
28
29our $DB_ENV;
30our $DB_STATE;
31our %DB_TABLE;
32
33sub 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 $DB_HOME: " . BDB::strerror;
50
51 1
52}
53
54sub table($) {
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 $db
69 }
70}
71
72#############################################################################
73
74unless (eval { open_db }) {
75 warn "$@";#d#
76 eval { File::Path::rmtree $DB_HOME };
77 open_db;
78}
79
80our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
81
82our $SYNC = EV::timer_ns 0, 60, sub {
83 $_[0]->stop;
84 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
85};
86
87our $tilemap;
88
89sub exists($$$) {
90 my ($db, $key, $cb) = @_;
91
92 my $data;
93 db_get table $db, undef, $key, $data, 0, sub {
94 $cb->($! ? () : length $data);
95 };
96}
97
98sub get($$$) {
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
107sub 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
116sub 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
133sub 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
163sub 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#############################################################################
28 191
29sub path_of_res($) { 192sub path_of_res($) {
30 utf8::downgrade $_[0]; # bug in unpack "H*" 193 utf8::downgrade $_[0]; # bug in unpack "H*"
31 "$DB_HOME/res-data-" . unpack "H*", $_[0] 194 "$DB_HOME/res-data-" . unpack "H*", $_[0]
32} 195}
… …
35 # for debugging 198 # for debugging
36 #CFPlus::DB::Server::req (sync => sub { }); 199 #CFPlus::DB::Server::req (sync => sub { });
37 CFPlus::DB::Server::sync (); 200 CFPlus::DB::Server::sync ();
38} 201}
39 202
40sub exists($$$) {
41 CFPlus::DB::Server::req (exists => @_);
42}
43
44sub get($$$) {
45 CFPlus::DB::Server::req (get => @_);
46}
47
48sub put($$$$) {
49 CFPlus::DB::Server::req (put => @_);
50}
51
52sub unlink($$) { 203sub unlink($$) {
53 CFPlus::DB::Server::req (unlink => @_); 204 CFPlus::DB::Server::req (unlink => @_);
54} 205}
55 206
56sub read_file($$) { 207sub read_file($$) {
… …
67 218
68sub logprint($$$) { 219sub logprint($$$) {
69 CFPlus::DB::Server::req (logprint => @_); 220 CFPlus::DB::Server::req (logprint => @_);
70} 221}
71 222
72our $tilemap;
73
74sub get_tile_id_sync($) {
75 my ($hash) = @_;
76
77 # fetch the full face table first
78 unless ($tilemap) {
79 CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });
80 sync;
81 }
82
83 $tilemap->{$hash} ||= do {
84 my $id;
85 CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] });
86 sync;
87 $id
88 }
89}
90
91package CFPlus::DB::Server; 223package CFPlus::DB::Server;
92 224
93use strict; 225use strict;
94 226
227use EV ();
95use Fcntl; 228use Fcntl;
96use BerkeleyDB;
97
98our $DB_ENV;
99our $DB_STATE;
100our %DB_TABLE;
101
102sub open_db {
103 mkdir $DB_HOME, 0777;
104 my $recover = $BerkeleyDB::db_version >= 4.4
105 ? eval "DB_REGISTER | DB_RECOVER"
106 : 0;
107
108 $DB_ENV = new BerkeleyDB::Env
109 -Home => $DB_HOME,
110 -Cachesize => 8_000_000,
111 -ErrFile => "$DB_HOME/errorlog.txt",
112# -ErrPrefix => "DATABASE",
113 -Verbose => 1,
114 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
115 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE | DB_TXN_WRITE_NOSYNC,
116 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
117
118 1
119}
120
121sub table($) {
122 $DB_TABLE{$_[0]} ||= do {
123 my ($table) = @_;
124
125 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
126
127 new BerkeleyDB::Btree
128 -Env => $DB_ENV,
129 -Filename => $table,
130# -Filename => "database",
131# -Subname => $table,
132 -Property => DB_CHKSUM,
133 -Flags => DB_AUTO_COMMIT | DB_CREATE | DB_UPGRADE,
134 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
135 }
136}
137 229
138our %CB; 230our %CB;
139our $FH; 231our $FH;
140our $ID = "aaa0"; 232our $ID = "aaa0";
141our ($fh_r_watcher, $fh_w_watcher); 233our ($fh_r_watcher, $fh_w_watcher);
142our $sync_timer; 234our $sync_timer;
143our $write_buf; 235our $write_buf;
144our $read_buf; 236our $read_buf;
145 237
146our $SYNC = Event->idle (min => 120, max => 180, parked => 1, cb => sub {
147 CFPlus::DB::Server::req (sync => sub { });
148 $_[0]->w->stop;
149});
150
151sub fh_write { 238sub fh_write {
152 my $len = syswrite $FH, $write_buf; 239 my $len = syswrite $FH, $write_buf;
153 240
154 substr $write_buf, 0, $len, ""; 241 substr $write_buf, 0, $len, "";
155 242
… …
198 my $id = ++$ID; 285 my $id = ++$ID;
199 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 286 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
200 $CB{$id} = $cb; 287 $CB{$id} = $cb;
201 288
202 $fh_w_watcher->start; 289 $fh_w_watcher->start;
203 $SYNC->start;
204}
205
206sub do_sync {
207 $DB_ENV->txn_checkpoint (0, 0, 0);
208 ()
209}
210
211sub do_exists {
212 my ($db, $key) = @_;
213
214 utf8::downgrade $key;
215 my $data;
216 (table $db)->db_get ($key, $data) == 0
217 ? length $data
218 : ()
219}
220
221sub do_get {
222 my ($db, $key) = @_;
223
224 utf8::downgrade $key;
225 my $data;
226 (table $db)->db_get ($key, $data) == 0
227 ? $data
228 : ()
229}
230
231sub do_put {
232 my ($db, $key, $data) = @_;
233
234 utf8::downgrade $key;
235 utf8::downgrade $data;
236 (table $db)->db_put ($key => $data)
237}
238
239sub do_table {
240 my ($db) = @_;
241
242 $db = table $db;
243
244 my $cursor = $db->db_cursor;
245 my %kv;
246 my ($k, $v);
247 $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
248
249 \%kv
250}
251
252sub do_get_tile_id {
253 my ($hash) = @_;
254
255 my $id;
256 my $table = table "facemap";
257
258 return $id
259 if $table->db_get ($hash, $id) == 0;
260
261 for (1..100) {
262 my $txn = $DB_ENV->txn_begin;
263 my $status = $table->db_get (id => $id);
264 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
265 $id = ($id || 64) + 1;
266 if ($table->db_put (id => $id) == 0
267 && $table->db_put ($hash => $id) == 0) {
268 $txn->txn_commit;
269
270 return $id;
271 }
272 }
273 $txn->txn_abort;
274 select undef, undef, undef, 0.01 * rand;
275 }
276
277 die "maximum number of transaction retries reached - database problems?";
278} 290}
279 291
280sub do_unlink { 292sub do_unlink {
281 unlink $_[0]; 293 unlink $_[0];
282} 294}
… …
351 local $SIG{__DIE__}; 363 local $SIG{__DIE__};
352 local $SIG{__WARN__}; 364 local $SIG{__WARN__};
353 eval { 365 eval {
354 close $FH; 366 close $FH;
355 367
356 unless (eval { open_db }) {
357 eval { File::Path::rmtree $DB_HOME };
358 open_db;
359 }
360
361 while () { 368 while () {
362 4 == read $fh, my $len, 4 369 4 == read $fh, my $len, 4
363 or last; 370 or last;
364 $len = unpack "N", $len; 371 $len = unpack "N", $len;
365 $len == read $fh, my $req, $len 372 $len == read $fh, my $req, $len
… …
370 my ($id, $type, @args) = @$req; 377 my ($id, $type, @args) = @$req;
371 my $cb = CFPlus::DB::Server->can ("do_$type") 378 my $cb = CFPlus::DB::Server->can ("do_$type")
372 or die "$type: unknown database request type\n"; 379 or die "$type: unknown database request type\n";
373 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 380 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
374 (syswrite $fh, $res) == length $res 381 (syswrite $fh, $res) == length $res
375 or die; 382 or die "DB::write: $!";
376 } 383 }
377 }; 384 };
378 385
379 my $error = $@; 386 my $error = $@;
380 387
381 eval { 388 eval {
382 undef %DB_TABLE;
383 undef $DB_ENV;
384
385 Storable::store_fd [die => $error], $fh; 389 Storable::store_fd [die => $error], $fh;
386 }; 390 };
387 391
392 warn $error
393 if $error;
394
388 CFPlus::_exit 0; 395 CFPlus::_exit 0;
389 } 396 }
390 397
391 close $fh; 398 close $fh;
392 CFPlus::fh_nonblocking $FH, 1; 399 CFPlus::fh_nonblocking $FH, 1;
393 400
394 $CB{die} = sub { die shift }; 401 $CB{die} = sub { die shift };
395 402
396 $fh_r_watcher = Event->io (fd => $FH, poll => 'r', nice => 1, cb => \&fh_read); 403 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
397 $fh_w_watcher = Event->io (fd => $FH, poll => 'w', nice => -1, parked => 1, cb => \&fh_write); 404 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
398 $SYNC->start;
399} 405}
400 406
401sub stop { 407sub stop {
402 close $FH; 408 close $FH;
403} 409}

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