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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.8 by root, Thu Jul 5 10:15:17 2007 UTC vs.
Revision 1.20 by root, Tue Aug 28 20:07:18 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 (); 21use Storable ();
22use Config;
23use Event ();
23 24
24use CFPlus; 25use CFPlus;
26
27our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}";
28
29sub path_of_res($) {
30 utf8::downgrade $_[0]; # bug in unpack "H*"
31 "$DB_HOME/res-data-" . unpack "H*", $_[0]
32}
25 33
26sub sync { 34sub sync {
27 # for debugging 35 # for debugging
28 #CFPlus::DB::Server::req (sync => sub { }); 36 #CFPlus::DB::Server::req (sync => sub { });
29 CFPlus::DB::Server::sync (); 37 CFPlus::DB::Server::sync ();
30} 38}
31 39
40sub exists($$$) {
41 CFPlus::DB::Server::req (exists => @_);
42}
43
32sub get($$$) { 44sub get($$$) {
33 CFPlus::DB::Server::req (get => @_); 45 CFPlus::DB::Server::req (get => @_);
34} 46}
35 47
36sub put($$$$) { 48sub put($$$$) {
37 CFPlus::DB::Server::req (put => @_); 49 CFPlus::DB::Server::req (put => @_);
38} 50}
39 51
52sub unlink($$) {
53 CFPlus::DB::Server::req (unlink => @_);
54}
55
56sub read_file($$) {
57 CFPlus::DB::Server::req (read_file => @_);
58}
59
60sub write_file($$$) {
61 CFPlus::DB::Server::req (write_file => @_);
62}
63
64sub prefetch_file($$$) {
65 CFPlus::DB::Server::req (prefetch_file => @_);
66}
67
68sub logprint($$$) {
69 CFPlus::DB::Server::req (logprint => @_);
70}
71
40our $tilemap; 72our $tilemap;
41 73
42sub get_tile_id_sync($) { 74sub get_tile_id_sync($) {
43 my ($hash) = @_; 75 my ($name) = @_;
44 76
45 # fetch the full face table first 77 # fetch the full face table first
46 unless ($tilemap) { 78 unless ($tilemap) {
47 CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] }); 79 CFPlus::DB::Server::req (table => facemap => sub {
80 $tilemap = $_[0];
81 delete $tilemap->{id};
82 my %maptile = reverse %$tilemap;#d#
83 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
84 $tilemap = { };#d#
85 CFPlus::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
86 }#d#
87 });
48 sync; 88 sync;
49 } 89 }
50 90
51 $tilemap->{$hash} ||= do { 91 $tilemap->{$name} ||= do {
52 my $id; 92 my $id;
53 CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] }); 93 CFPlus::DB::Server::req (get_tile_id => $name, sub { $id = $_[0] });
54 sync; 94 sync;
55 $id 95 $id
56 } 96 }
57} 97}
58 98
… …
60 100
61use strict; 101use strict;
62 102
63use Fcntl; 103use Fcntl;
64use BerkeleyDB; 104use BerkeleyDB;
65use Config;
66 105
67our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}";
68our $DB_ENV; 106our $DB_ENV;
69our $DB_STATE; 107our $DB_STATE;
70our %DB_TABLE; 108our %DB_TABLE;
71 109
72sub open_db { 110sub open_db {
… …
80 -Cachesize => 8_000_000, 118 -Cachesize => 8_000_000,
81 -ErrFile => "$DB_HOME/errorlog.txt", 119 -ErrFile => "$DB_HOME/errorlog.txt",
82# -ErrPrefix => "DATABASE", 120# -ErrPrefix => "DATABASE",
83 -Verbose => 1, 121 -Verbose => 1,
84 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover, 122 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
85 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE, 123 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE | DB_TXN_WRITE_NOSYNC,
86 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error"; 124 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
87 125
88 1 126 1
89} 127}
90 128
… …
98 -Env => $DB_ENV, 136 -Env => $DB_ENV,
99 -Filename => $table, 137 -Filename => $table,
100# -Filename => "database", 138# -Filename => "database",
101# -Subname => $table, 139# -Subname => $table,
102 -Property => DB_CHKSUM, 140 -Property => DB_CHKSUM,
103 -Flags => DB_CREATE | DB_UPGRADE, 141 -Flags => DB_AUTO_COMMIT | DB_CREATE | DB_UPGRADE,
104 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error" 142 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
105 } 143 }
106} 144}
107
108our $SYNC_INTERVAL = 60;
109 145
110our %CB; 146our %CB;
111our $FH; 147our $FH;
112our $ID = "aaa0"; 148our $ID = "aaa0";
113our ($fh_r_watcher, $fh_w_watcher); 149our ($fh_r_watcher, $fh_w_watcher);
114our $sync_timer; 150our $sync_timer;
115our $write_buf; 151our $write_buf;
116our $read_buf; 152our $read_buf;
117 153
154our $SYNC = Event->idle (min => 120, max => 180, parked => 1, cb => sub {
155 CFPlus::DB::Server::req (sync => sub { });
156 $_[0]->w->stop;
157});
158
118sub fh_write { 159sub fh_write {
119 my $len = syswrite $FH, $write_buf; 160 my $len = syswrite $FH, $write_buf;
120 161
121 substr $write_buf, 0, $len, ""; 162 substr $write_buf, 0, $len, "";
122 163
123 undef $fh_w_watcher 164 $fh_w_watcher->stop
124 unless length $write_buf; 165 unless length $write_buf;
125} 166}
126 167
127sub fh_read { 168sub fh_read {
128 my $status = sysread $FH, $read_buf, 16384, length $read_buf; 169 my $status = sysread $FH, $read_buf, 16384, length $read_buf;
… …
164 205
165 my $id = ++$ID; 206 my $id = ++$ID;
166 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 207 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
167 $CB{$id} = $cb; 208 $CB{$id} = $cb;
168 209
169 $fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write); 210 $fh_w_watcher->start;
170} 211 $SYNC->start;
171
172sub sync_tick {
173 req "sync", sub { };
174 $sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
175} 212}
176 213
177sub do_sync { 214sub do_sync {
178 $DB_ENV->txn_checkpoint (0, 0, 0); 215 $DB_ENV->txn_checkpoint (0, 0, 0);
179 () 216 ()
217}
218
219sub do_exists {
220 my ($db, $key) = @_;
221
222 utf8::downgrade $key;
223 my $data;
224 (table $db)->db_get ($key, $data) == 0
225 ? length $data
226 : ()
180} 227}
181 228
182sub do_get { 229sub do_get {
183 my ($db, $key) = @_; 230 my ($db, $key) = @_;
184 231
… …
209 256
210 \%kv 257 \%kv
211} 258}
212 259
213sub do_get_tile_id { 260sub do_get_tile_id {
214 my ($hash) = @_; 261 my ($name) = @_;
215 262
216 my $id; 263 my $id;
217 my $table = table "facemap"; 264 my $table = table "facemap";
218 265
219 return $id 266 return $id
220 if $table->db_get ($hash, $id) == 0; 267 if $table->db_get ($name, $id) == 0;
221 268
222 for (1..100) { 269 for (1..100) {
223 my $txn = $DB_ENV->txn_begin; 270 my $txn = $DB_ENV->txn_begin;
224 my $status = $table->db_get (id => $id); 271 my $status = $table->db_get (id => $id);
225 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) { 272 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
226 $id = ($id || 64) + 1; 273 $id = ($id || 64) + 1;
227 if ($table->db_put (id => $id) == 0 274 if ($table->db_put (id => $id) == 0
228 && $table->db_put ($hash => $id) == 0) { 275 && $table->db_put ($name => $id) == 0) {
229 $txn->txn_commit; 276 $txn->txn_commit;
230 277
231 return $id; 278 return $id;
232 } 279 }
233 } 280 }
234 $txn->txn_abort; 281 $txn->txn_abort;
282 select undef, undef, undef, 0.01 * rand;
235 } 283 }
236 284
237 die "maximum number of transaction retries reached - database problems?"; 285 die "maximum number of transaction retries reached - database problems?";
286}
287
288sub do_unlink {
289 unlink $_[0];
290}
291
292sub do_read_file {
293 my ($path) = @_;
294
295 utf8::downgrade $path;
296 open my $fh, "<:raw", $path
297 or return;
298 sysread $fh, my $buf, -s $fh;
299
300 $buf
301}
302
303sub do_write_file {
304 my ($path, $data) = @_;
305
306 utf8::downgrade $path;
307 utf8::downgrade $data;
308 open my $fh, ">:raw", $path
309 or return;
310 syswrite $fh, $data;
311 close $fh;
312
313 1
314}
315
316sub do_prefetch_file {
317 my ($path, $size) = @_;
318
319 utf8::downgrade $path;
320 open my $fh, "<:raw", $path
321 or return;
322 sysread $fh, my $buf, $size;
323
324 1
325}
326
327our %LOG_FH;
328
329sub do_logprint {
330 my ($path, $line) = @_;
331
332 $LOG_FH{$path} ||= do {
333 open my $fh, ">>:utf8", $path
334 or warn "Couldn't open logfile $path: $!";
335
336 $fh->autoflush (1);
337
338 $fh
339 };
340
341 my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
342
343 my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
344 $year + 1900, $mon + 1, $mday, $hour, $min, $sec;
345
346 print { $LOG_FH{$path} } "$ts $line\n"
238} 347}
239 348
240sub run { 349sub run {
241 ($FH, my $fh) = CFPlus::socketpipe; 350 ($FH, my $fh) = CFPlus::socketpipe;
242 351
… …
244 my $oldfh = select $fh; $| = 1; select $oldfh; 353 my $oldfh = select $fh; $| = 1; select $oldfh;
245 354
246 my $pid = fork; 355 my $pid = fork;
247 356
248 if (defined $pid && !$pid) { 357 if (defined $pid && !$pid) {
358 local $SIG{QUIT};
249 local $SIG{__DIE__}; 359 local $SIG{__DIE__};
360 local $SIG{__WARN__};
250 eval { 361 eval {
251 close $FH; 362 close $FH;
252 363
253 unless (eval { open_db }) { 364 unless (eval { open_db }) {
254 eval { File::Path::rmtree $DB_HOME }; 365 eval { File::Path::rmtree $DB_HOME };
… …
288 close $fh; 399 close $fh;
289 CFPlus::fh_nonblocking $FH, 1; 400 CFPlus::fh_nonblocking $FH, 1;
290 401
291 $CB{die} = sub { die shift }; 402 $CB{die} = sub { die shift };
292 403
293 $fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read); 404 $fh_r_watcher = Event->io (fd => $FH, poll => 'r', nice => 1, cb => \&fh_read);
294 405 $fh_w_watcher = Event->io (fd => $FH, poll => 'w', nice => -1, parked => 1, cb => \&fh_write);
295 sync_tick; 406 $SYNC->start;
296} 407}
297 408
298sub stop { 409sub stop {
299 close $FH; 410 close $FH;
300} 411}

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