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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.3 by root, Fri Apr 6 21:53:56 2007 UTC vs.
Revision 1.22 by root, Tue Nov 13 02:47:30 2007 UTC

1=head1 NAME 1=head1 NAME
2 2
3CFPlus::DB - async. database access for cfplus 3CFPlus::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
17use strict; 17use strict;
18use utf8; 18use utf8;
19 19
20use Carp (); 20use Carp ();
21use AnyEvent ();
22use Storable (); # finally 21use Storable ();
22use Config;
23 23
24use CFPlus; 24use CFPlus;
25
26our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}";
27
28sub path_of_res($) {
29 utf8::downgrade $_[0]; # bug in unpack "H*"
30 "$DB_HOME/res-data-" . unpack "H*", $_[0]
31}
25 32
26sub sync { 33sub sync {
27 # for debugging 34 # for debugging
28 #CFPlus::DB::Server::req (sync => sub { }); 35 #CFPlus::DB::Server::req (sync => sub { });
29 CFPlus::DB::Server::sync (); 36 CFPlus::DB::Server::sync ();
30} 37}
31 38
39sub exists($$$) {
40 CFPlus::DB::Server::req (exists => @_);
41}
42
32sub get($$$) { 43sub get($$$) {
33 CFPlus::DB::Server::req (get => @_); 44 CFPlus::DB::Server::req (get => @_);
34} 45}
35 46
36sub put($$$$) { 47sub put($$$$) {
37 CFPlus::DB::Server::req (put => @_); 48 CFPlus::DB::Server::req (put => @_);
38} 49}
39 50
51sub unlink($$) {
52 CFPlus::DB::Server::req (unlink => @_);
53}
54
55sub read_file($$) {
56 CFPlus::DB::Server::req (read_file => @_);
57}
58
59sub write_file($$$) {
60 CFPlus::DB::Server::req (write_file => @_);
61}
62
63sub prefetch_file($$$) {
64 CFPlus::DB::Server::req (prefetch_file => @_);
65}
66
67sub logprint($$$) {
68 CFPlus::DB::Server::req (logprint => @_);
69}
70
40our $tilemap; 71our $tilemap;
41 72
42sub get_tile_id_sync($) { 73sub get_tile_id_sync($) {
43 my ($hash) = @_; 74 my ($name) = @_;
44 75
45 # fetch the full face table first 76 # fetch the full face table first
46 unless ($tilemap) { 77 unless ($tilemap) {
47 CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] }); 78 CFPlus::DB::Server::req (table => facemap => sub {
79 $tilemap = $_[0];
80 delete $tilemap->{id};
81 my %maptile = reverse %$tilemap;#d#
82 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
83 $tilemap = { };#d#
84 CFPlus::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
85 }#d#
86 });
48 sync; 87 sync;
49 } 88 }
50 89
51 $tilemap->{$hash} ||= do { 90 $tilemap->{$name} ||= do {
52 my $id; 91 my $id;
53 CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] }); 92 CFPlus::DB::Server::req (get_tile_id => $name, sub { $id = $_[0] });
54 sync; 93 sync;
55 $id 94 $id
56 } 95 }
57} 96}
58 97
… …
61use strict; 100use strict;
62 101
63use Fcntl; 102use Fcntl;
64use BerkeleyDB; 103use BerkeleyDB;
65 104
66our $DB_HOME = "$Crossfire::VARDIR/cfplus";
67our $DB_ENV; 105our $DB_ENV;
68our $DB_STATE; 106our $DB_STATE;
69our %DB_TABLE; 107our %DB_TABLE;
70 108
71sub open_db { 109sub open_db {
… …
79 -Cachesize => 8_000_000, 117 -Cachesize => 8_000_000,
80 -ErrFile => "$DB_HOME/errorlog.txt", 118 -ErrFile => "$DB_HOME/errorlog.txt",
81# -ErrPrefix => "DATABASE", 119# -ErrPrefix => "DATABASE",
82 -Verbose => 1, 120 -Verbose => 1,
83 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover, 121 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
84 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE, 122 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE | DB_TXN_WRITE_NOSYNC,
85 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error"; 123 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
86 124
87 1 125 1
88} 126}
89 127
… …
97 -Env => $DB_ENV, 135 -Env => $DB_ENV,
98 -Filename => $table, 136 -Filename => $table,
99# -Filename => "database", 137# -Filename => "database",
100# -Subname => $table, 138# -Subname => $table,
101 -Property => DB_CHKSUM, 139 -Property => DB_CHKSUM,
102 -Flags => DB_CREATE | DB_UPGRADE, 140 -Flags => DB_AUTO_COMMIT | DB_CREATE | DB_UPGRADE,
103 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error" 141 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
104 } 142 }
105} 143}
106
107our $SYNC_INTERVAL = 6;
108 144
109our %CB; 145our %CB;
110our $FH; 146our $FH;
111our $ID = "aaa0"; 147our $ID = "aaa0";
112our ($fh_r_watcher, $fh_w_watcher); 148our ($fh_r_watcher, $fh_w_watcher);
113our $sync_timer; 149our $sync_timer;
114our $write_buf; 150our $write_buf;
115our $read_buf; 151our $read_buf;
116 152
153our $SYNC = EV::timer_ns 0, 60, sub {
154 $_[0]->stop;
155 CFPlus::DB::Server::req (sync => sub { });
156};
157
117sub fh_write { 158sub fh_write {
118 my $len = syswrite $FH, $write_buf; 159 my $len = syswrite $FH, $write_buf;
119 160
120 substr $write_buf, 0, $len, ""; 161 substr $write_buf, 0, $len, "";
121 162
122 undef $fh_w_watcher 163 $fh_w_watcher->stop
123 unless length $write_buf; 164 unless length $write_buf;
124} 165}
125 166
126sub fh_read { 167sub fh_read {
127 my $status = sysread $FH, $read_buf, 16384, length $read_buf; 168 my $status = sysread $FH, $read_buf, 16384, length $read_buf;
… …
163 204
164 my $id = ++$ID; 205 my $id = ++$ID;
165 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 206 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
166 $CB{$id} = $cb; 207 $CB{$id} = $cb;
167 208
168 $fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write); 209 $fh_w_watcher->start;
169} 210 $SYNC->again unless $SYNC->is_active;
170
171sub sync_tick {
172 req "sync", sub { };
173 $sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
174} 211}
175 212
176sub do_sync { 213sub do_sync {
177 $DB_ENV->txn_checkpoint (0, 0, 0); 214 $DB_ENV->txn_checkpoint (0, 0, 0);
178 () 215 ()
179} 216}
180 217
218sub do_exists {
219 my ($db, $key) = @_;
220
221 utf8::downgrade $key;
222 my $data;
223 (table $db)->db_get ($key, $data) == 0
224 ? length $data
225 : ()
226}
227
181sub do_get { 228sub do_get {
182 my ($db, $key) = @_; 229 my ($db, $key) = @_;
183 230
231 utf8::downgrade $key;
184 my $data; 232 my $data;
185 (table $db)->db_get ($key, $data) == 0 233 (table $db)->db_get ($key, $data) == 0
186 ? $data 234 ? $data
187 : () 235 : ()
188} 236}
189 237
190sub do_put { 238sub do_put {
191 my ($db, $key, $data) = @_; 239 my ($db, $key, $data) = @_;
192 240
241 utf8::downgrade $key;
242 utf8::downgrade $data;
193 (table $db)->db_put ($key => $data) 243 (table $db)->db_put ($key => $data)
194} 244}
195 245
196sub do_table { 246sub do_table {
197 my ($db) = @_; 247 my ($db) = @_;
… …
205 255
206 \%kv 256 \%kv
207} 257}
208 258
209sub do_get_tile_id { 259sub do_get_tile_id {
210 my ($hash) = @_; 260 my ($name) = @_;
211 261
212 my $id; 262 my $id;
213 my $table = table "facemap"; 263 my $table = table "facemap";
214 264
215 return $id 265 return $id
216 if $table->db_get ($hash, $id) == 0; 266 if $table->db_get ($name, $id) == 0;
217 267
218 for (1..100) { 268 for (1..100) {
219 my $txn = $DB_ENV->txn_begin; 269 my $txn = $DB_ENV->txn_begin;
220 my $status = $table->db_get (id => $id); 270 my $status = $table->db_get (id => $id);
221 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) { 271 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
222 $id = ($id || 64) + 1; 272 $id = ($id || 64) + 1;
223 if ($table->db_put (id => $id) == 0 273 if ($table->db_put (id => $id) == 0
224 && $table->db_put ($hash => $id) == 0) { 274 && $table->db_put ($name => $id) == 0) {
225 $txn->txn_commit; 275 $txn->txn_commit;
226 276
227 return $id; 277 return $id;
228 } 278 }
229 } 279 }
230 $txn->txn_abort; 280 $txn->txn_abort;
281 select undef, undef, undef, 0.01 * rand;
231 } 282 }
232 283
233 die "maximum number of transaction retries reached - database problems?"; 284 die "maximum number of transaction retries reached - database problems?";
285}
286
287sub do_unlink {
288 unlink $_[0];
289}
290
291sub do_read_file {
292 my ($path) = @_;
293
294 utf8::downgrade $path;
295 open my $fh, "<:raw", $path
296 or return;
297 sysread $fh, my $buf, -s $fh;
298
299 $buf
300}
301
302sub do_write_file {
303 my ($path, $data) = @_;
304
305 utf8::downgrade $path;
306 utf8::downgrade $data;
307 open my $fh, ">:raw", $path
308 or return;
309 syswrite $fh, $data;
310 close $fh;
311
312 1
313}
314
315sub do_prefetch_file {
316 my ($path, $size) = @_;
317
318 utf8::downgrade $path;
319 open my $fh, "<:raw", $path
320 or return;
321 sysread $fh, my $buf, $size;
322
323 1
324}
325
326our %LOG_FH;
327
328sub do_logprint {
329 my ($path, $line) = @_;
330
331 $LOG_FH{$path} ||= do {
332 open my $fh, ">>:utf8", $path
333 or warn "Couldn't open logfile $path: $!";
334
335 $fh->autoflush (1);
336
337 $fh
338 };
339
340 my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
341
342 my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
343 $year + 1900, $mon + 1, $mday, $hour, $min, $sec;
344
345 print { $LOG_FH{$path} } "$ts $line\n"
234} 346}
235 347
236sub run { 348sub run {
237 ($FH, my $fh) = CFPlus::socketpipe; 349 ($FH, my $fh) = CFPlus::socketpipe;
238 350
… …
240 my $oldfh = select $fh; $| = 1; select $oldfh; 352 my $oldfh = select $fh; $| = 1; select $oldfh;
241 353
242 my $pid = fork; 354 my $pid = fork;
243 355
244 if (defined $pid && !$pid) { 356 if (defined $pid && !$pid) {
357 local $SIG{QUIT};
245 local $SIG{__DIE__}; 358 local $SIG{__DIE__};
359 local $SIG{__WARN__};
246 eval { 360 eval {
247 close $FH; 361 close $FH;
248 362
249 unless (eval { open_db }) { 363 unless (eval { open_db }) {
250 File::Path::rmtree $DB_HOME; 364 eval { File::Path::rmtree $DB_HOME };
251 open_db; 365 open_db;
252 } 366 }
253 367
254 while () { 368 while () {
255 4 == read $fh, my $len, 4 369 4 == read $fh, my $len, 4
… …
263 my ($id, $type, @args) = @$req; 377 my ($id, $type, @args) = @$req;
264 my $cb = CFPlus::DB::Server->can ("do_$type") 378 my $cb = CFPlus::DB::Server->can ("do_$type")
265 or die "$type: unknown database request type\n"; 379 or die "$type: unknown database request type\n";
266 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 380 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
267 (syswrite $fh, $res) == length $res 381 (syswrite $fh, $res) == length $res
268 or die; 382 or die "DB::write: $!";
269 } 383 }
270 }; 384 };
271 385
272 my $error = $@; 386 my $error = $@;
273 387
274 eval { 388 eval {
389 $DB_ENV->txn_checkpoint (0, 0, 0);
390
275 undef %DB_TABLE; 391 undef %DB_TABLE;
276 undef $DB_ENV; 392 undef $DB_ENV;
277 393
278 Storable::store_fd [die => $error], $fh; 394 Storable::store_fd [die => $error], $fh;
279 }; 395 };
… …
284 close $fh; 400 close $fh;
285 CFPlus::fh_nonblocking $FH, 1; 401 CFPlus::fh_nonblocking $FH, 1;
286 402
287 $CB{die} = sub { die shift }; 403 $CB{die} = sub { die shift };
288 404
289 $fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read); 405 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
406 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
407 $SYNC->again unless $SYNC->is_active;
408}
290 409
291 sync_tick; 410sub stop {
411 close $FH;
292} 412}
293 413
2941; 4141;
295 415
296=back 416=back

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