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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.207 by root, Sun Feb 11 22:42:09 2007 UTC vs.
Revision 1.208 by root, Mon Feb 12 00:27:20 2007 UTC

… …
22use Digest::MD5; 22use Digest::MD5;
23use Fcntl; 23use Fcntl;
24use IO::AIO 2.32 (); 24use IO::AIO 2.32 ();
25use YAML::Syck (); 25use YAML::Syck ();
26use Time::HiRes; 26use Time::HiRes;
27use Compress::LZF;
28
29Compress::LZF::sfreeze_cr { }; # prime Compress::LZF so it does not use require later
27 30
28use Event; $Event::Eval = 1; # no idea why this is required, but it is 31use Event; $Event::Eval = 1; # no idea why this is required, but it is
29 32
30sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload 33sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
31 34
… …
2182The parameter C<$family> should best start with the name of the extension 2185The parameter C<$family> should best start with the name of the extension
2183using it, it should be unique. 2186using it, it should be unique.
2184 2187
2185=over 4 2188=over 4
2186 2189
2187=item $hashref = cf::db_get $family
2188
2189Return a hashref for use by the extension C<$family>, which can be
2190modified. After modifications, you have to call C<cf::db_dirty> or
2191C<cf::db_sync>.
2192
2193=item $value = cf::db_get $family => $key 2190=item $value = cf::db_get $family => $key
2194 2191
2195Returns a single value from the database 2192Returns a single value from the database.
2196
2197=item cf::db_put $family => $hashref
2198
2199Stores the given family hashref into the database. Updates are delayed, if
2200you want the data to be synced to disk immediately, use C<cf::db_sync>.
2201 2193
2202=item cf::db_put $family => $key => $value 2194=item cf::db_put $family => $key => $value
2203 2195
2204Stores the given C<$value> in the family hash. Updates are delayed, if you 2196Stores the given C<$value> in the family.
2205want the data to be synced to disk immediately, use C<cf::db_sync>.
2206
2207=item cf::db_dirty
2208
2209Marks the database as dirty, to be updated at a later time.
2210
2211=item cf::db_sync
2212
2213Immediately write the database to disk I<if it is dirty>.
2214 2197
2215=cut 2198=cut
2216 2199
2217our $DB; 2200our $DB;
2218 2201
2219{ 2202sub db_load() {
2203 unless ($DB) {
2204 $DB = BDB::db_create $DB_ENV;
2205
2206 cf::sync_job {
2207 eval {
2208 $DB->set_flags (BDB::CHKSUM);
2209
2210 BDB::db_open $DB, undef, "db", undef, BDB::BTREE,
2211 BDB::CREATE | BDB::AUTO_COMMIT, 0666;
2212 cf::cleanup "db_open(db): $!" if $!;
2213 };
2214 cf::cleanup "db_open(db): $@" if $@;
2215 };
2216
2220 my $path = cf::localdir . "/database.pst"; 2217 my $path = cf::localdir . "/database.pst";
2218 if (stat $path) {
2219 cf::sync_job {
2220 my $pst = Storable::retrieve $path;
2221 2221
2222 sub db_load() { 2222 cf::db_put (board => data => $pst->{board});
2223 $DB = stat $path ? Storable::retrieve $path : { }; 2223 cf::db_put (guildrules => data => $pst->{guildrules});
2224 } 2224 cf::db_put (rent => balance => $pst->{rent}{balance});
2225 BDB::db_env_txn_checkpoint $DB_ENV;
2225 2226
2226 my $pid; 2227 unlink $path;
2227
2228 sub db_save() {
2229 waitpid $pid, 0 if $pid;
2230 if (0 == ($pid = fork)) {
2231 $DB->{_meta}{version} = 1;
2232 Storable::nstore $DB, "$path~";
2233 rename "$path~", $path;
2234 cf::_exit 0 if defined $pid;
2235 } 2228 };
2236 }
2237
2238 my $dirty;
2239
2240 sub db_sync() {
2241 db_save if $dirty;
2242 undef $dirty;
2243 }
2244
2245 my $idle = Event->idle (
2246 reentrant => 0,
2247 min => 10,
2248 max => 20,
2249 repeat => 0,
2250 data => WF_AUTOCANCEL,
2251 cb => \&db_sync,
2252 );
2253
2254 sub db_dirty() {
2255 $dirty = 1;
2256 $idle->start;
2257 }
2258
2259 sub db_get($;$) {
2260 @_ >= 2
2261 ? $DB->{$_[0]}{$_[1]}
2262 : ($DB->{$_[0]} ||= { })
2263 }
2264
2265 sub db_put($$;$) {
2266 if (@_ >= 3) {
2267 $DB->{$_[0]}{$_[1]} = $_[2];
2268 } else {
2269 $DB->{$_[0]} = $_[1];
2270 }
2271 db_dirty;
2272 }
2273
2274 cf::global->attach (
2275 prio => 10000,
2276 on_cleanup => sub {
2277 db_sync;
2278 }, 2229 }
2279 ); 2230 }
2231}
2232
2233sub db_get($$) {
2234 my $key = "$_[0]/$_[1]";
2235
2236 cf::sync_job {
2237 BDB::db_get $DB, undef, $key, my $data;
2238
2239 $! ? ()
2240 : Compress::LZF::sthaw $data
2241 }
2242}
2243
2244sub db_put($$$) {
2245 BDB::dbreq_pri 4;
2246 BDB::db_put $DB, undef, "$_[0]/$_[1]", Compress::LZF::sfreeze_cr $_[2], 0, sub { };
2280} 2247}
2281 2248
2282############################################################################# 2249#############################################################################
2283# the server's init and main functions 2250# the server's init and main functions
2284 2251
… …
2369 my $map = $cf::MAP{$path} or next; 2336 my $map = $cf::MAP{$path} or next;
2370 $map->valid or next; 2337 $map->valid or next;
2371 $map->save; 2338 $map->save;
2372 } 2339 }
2373 warn "end emergency map save\n"; 2340 warn "end emergency map save\n";
2341
2342 warn "begin emergency database checkpoint\n";
2343 BDB::db_env_txn_checkpoint $DB_ENV;
2344 warn "end emergency database checkpoint\n";
2374 }; 2345 };
2375 2346
2376 warn "leave emergency perl save\n"; 2347 warn "leave emergency perl save\n";
2377} 2348}
2378 2349
… …
2391 cf::emergency_save; 2362 cf::emergency_save;
2392 2363
2393 eval { 2364 eval {
2394 # if anything goes wrong in here, we should simply crash as we already saved 2365 # if anything goes wrong in here, we should simply crash as we already saved
2395 2366
2396 warn "syncing database to disk";
2397 cf::db_sync;
2398
2399 warn "cancelling all WF_AUTOCANCEL watchers"; 2367 warn "cancelling all WF_AUTOCANCEL watchers";
2400 for (Event::all_watchers) { 2368 for (Event::all_watchers) {
2401 $_->cancel if $_->data & WF_AUTOCANCEL; 2369 $_->cancel if $_->data & WF_AUTOCANCEL;
2402 } 2370 }
2403 2371
2372 warn "syncing database to disk";
2373 BDB::db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
2374
2404 warn "flushing outstanding aio requests"; 2375 warn "flushing outstanding aio requests";
2405 for (;;) { 2376 for (;;) {
2377 BDB::flush;
2406 IO::AIO::flush; 2378 IO::AIO::flush;
2407 Coro::cede; 2379 Coro::cede;
2408 last unless IO::AIO::nreqs; 2380 last unless IO::AIO::nreqs || BDB::nreqs;
2409 warn "iterate..."; 2381 warn "iterate...";
2410 } 2382 }
2411 2383
2412 warn "cancelling all extension coros"; 2384 warn "cancelling all extension coros";
2413 $_->cancel for values %EXT_CORO; 2385 $_->cancel for values %EXT_CORO;
… …
2589 2561
2590 unless ($DB_ENV) { 2562 unless ($DB_ENV) {
2591 $DB_ENV = BDB::db_env_create; 2563 $DB_ENV = BDB::db_env_create;
2592 2564
2593 cf::sync_job { 2565 cf::sync_job {
2566 eval {
2594 BDB::db_env_open 2567 BDB::db_env_open
2595 $DB_ENV, 2568 $DB_ENV,
2596 $BDB_ENV_DIR, 2569 $BDB_ENV_DIR,
2597 BDB::INIT_LOCK | BDB::INIT_LOG | BDB::INIT_MPOOL | BDB::INIT_TXN 2570 BDB::INIT_LOCK | BDB::INIT_LOG | BDB::INIT_MPOOL | BDB::INIT_TXN
2598 | BDB::RECOVER | BDB::REGISTER | BDB::USE_ENVIRON | BDB::CREATE, 2571 | BDB::RECOVER | BDB::REGISTER | BDB::USE_ENVIRON | BDB::CREATE,
2599 0666; 2572 0666;
2600 2573
2601 cf::cleanup "$!" if $!; 2574 cf::cleanup "db_env_open($BDB_ENV_DIR): $!" if $!;
2602 2575
2603 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT | BDB::TXN_NOSYNC, 1); 2576 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT | BDB::TXN_NOSYNC, 1);
2604 $DB_ENV->set_lk_detect; 2577 $DB_ENV->set_lk_detect;
2578 };
2579
2580 cf::cleanup "db_env_open(db): $@" if $@;
2605 }; 2581 };
2606 } 2582 }
2607} 2583}
2608 2584
2609{ 2585{

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