1 | =head1 NAME |
1 | =head1 NAME |
2 | |
2 | |
3 | CFPlus::DB - async. database access for cfplus |
3 | CFPlus::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 | |
17 | use strict; |
17 | use strict; |
18 | use utf8; |
18 | use utf8; |
19 | |
19 | |
20 | use Carp (); |
20 | use Carp (); |
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21 | use Storable (); |
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22 | use Config; |
21 | use AnyEvent (); |
23 | use Event (); |
22 | use Storable (); # finally |
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23 | |
24 | |
24 | use CFPlus; |
25 | use CFPlus; |
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26 | |
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27 | our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}"; |
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28 | |
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29 | sub path_of_res($) { |
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30 | utf8::downgrade $_[0]; # bug in unpack "H*" |
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31 | "$DB_HOME/res-data-" . unpack "H*", $_[0] |
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32 | } |
25 | |
33 | |
26 | sub sync { |
34 | sub 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 | |
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40 | sub exists($$$) { |
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41 | CFPlus::DB::Server::req (exists => @_); |
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42 | } |
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43 | |
32 | sub get($$$) { |
44 | sub get($$$) { |
33 | CFPlus::DB::Server::req (get => @_); |
45 | CFPlus::DB::Server::req (get => @_); |
34 | } |
46 | } |
35 | |
47 | |
36 | sub put($$$$) { |
48 | sub put($$$$) { |
37 | CFPlus::DB::Server::req (put => @_); |
49 | CFPlus::DB::Server::req (put => @_); |
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50 | } |
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51 | |
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52 | sub unlink($$) { |
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53 | CFPlus::DB::Server::req (unlink => @_); |
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54 | } |
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55 | |
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56 | sub write_file($$$) { |
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57 | CFPlus::DB::Server::req (write_file => @_); |
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58 | } |
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59 | |
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60 | sub prefetch_file($$$) { |
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61 | CFPlus::DB::Server::req (prefetch_file => @_); |
38 | } |
62 | } |
39 | |
63 | |
40 | our $tilemap; |
64 | our $tilemap; |
41 | |
65 | |
42 | sub get_tile_id_sync($) { |
66 | sub get_tile_id_sync($) { |
… | |
… | |
61 | use strict; |
85 | use strict; |
62 | |
86 | |
63 | use Fcntl; |
87 | use Fcntl; |
64 | use BerkeleyDB; |
88 | use BerkeleyDB; |
65 | |
89 | |
66 | our $DB_HOME = "$Crossfire::VARDIR/cfplus"; |
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67 | our $DB_ENV; |
90 | our $DB_ENV; |
68 | our $DB_STATE; |
91 | our $DB_STATE; |
69 | our %DB_TABLE; |
92 | our %DB_TABLE; |
70 | |
93 | |
71 | sub open_db { |
94 | sub open_db { |
… | |
… | |
102 | -Flags => DB_CREATE | DB_UPGRADE, |
125 | -Flags => DB_CREATE | DB_UPGRADE, |
103 | or die "unable to create/open database table $_[0]: $BerkeleyDB::Error" |
126 | or die "unable to create/open database table $_[0]: $BerkeleyDB::Error" |
104 | } |
127 | } |
105 | } |
128 | } |
106 | |
129 | |
107 | our $SYNC_INTERVAL = 6; |
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108 | |
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109 | our %CB; |
130 | our %CB; |
110 | our $FH; |
131 | our $FH; |
111 | our $ID = "aaa0"; |
132 | our $ID = "aaa0"; |
112 | our ($fh_r_watcher, $fh_w_watcher); |
133 | our ($fh_r_watcher, $fh_w_watcher); |
113 | our $sync_timer; |
134 | our $sync_timer; |
114 | our $write_buf; |
135 | our $write_buf; |
115 | our $read_buf; |
136 | our $read_buf; |
116 | |
137 | |
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138 | our $SYNC = Event->idle (min => 5, max => 60, parked => 1, cb => sub { |
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139 | CFPlus::DB::Server::req (sync => sub { }); |
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140 | $_[0]->w->stop; |
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141 | }); |
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142 | |
117 | sub fh_write { |
143 | sub fh_write { |
118 | my $len = syswrite $FH, $write_buf; |
144 | my $len = syswrite $FH, $write_buf; |
119 | |
145 | |
120 | substr $write_buf, 0, $len, ""; |
146 | substr $write_buf, 0, $len, ""; |
121 | |
147 | |
122 | undef $fh_w_watcher |
148 | $fh_w_watcher->stop |
123 | unless length $write_buf; |
149 | unless length $write_buf; |
124 | } |
150 | } |
125 | |
151 | |
126 | sub fh_read { |
152 | sub fh_read { |
127 | my $status = sysread $FH, $read_buf, 16384, length $read_buf; |
153 | my $status = sysread $FH, $read_buf, 16384, length $read_buf; |
… | |
… | |
163 | |
189 | |
164 | my $id = ++$ID; |
190 | my $id = ++$ID; |
165 | $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; |
191 | $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; |
166 | $CB{$id} = $cb; |
192 | $CB{$id} = $cb; |
167 | |
193 | |
168 | $fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write); |
194 | $fh_w_watcher->start; |
169 | } |
195 | $SYNC->start; |
170 | |
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171 | sub sync_tick { |
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172 | req "sync", sub { }; |
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173 | $sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick); |
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174 | } |
196 | } |
175 | |
197 | |
176 | sub do_sync { |
198 | sub do_sync { |
177 | $DB_ENV->txn_checkpoint (0, 0, 0); |
199 | $DB_ENV->txn_checkpoint (0, 0, 0); |
178 | () |
200 | () |
179 | } |
201 | } |
180 | |
202 | |
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203 | sub do_exists { |
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204 | my ($db, $key) = @_; |
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205 | |
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206 | utf8::downgrade $key; |
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207 | my $data; |
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208 | (table $db)->db_get ($key, $data) == 0 |
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209 | ? length $data |
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210 | : () |
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211 | } |
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212 | |
181 | sub do_get { |
213 | sub do_get { |
182 | my ($db, $key) = @_; |
214 | my ($db, $key) = @_; |
183 | |
215 | |
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216 | utf8::downgrade $key; |
184 | my $data; |
217 | my $data; |
185 | (table $db)->db_get ($key, $data) == 0 |
218 | (table $db)->db_get ($key, $data) == 0 |
186 | ? $data |
219 | ? $data |
187 | : () |
220 | : () |
188 | } |
221 | } |
189 | |
222 | |
190 | sub do_put { |
223 | sub do_put { |
191 | my ($db, $key, $data) = @_; |
224 | my ($db, $key, $data) = @_; |
192 | |
225 | |
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226 | utf8::downgrade $key; |
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227 | utf8::downgrade $data; |
193 | (table $db)->db_put ($key => $data) |
228 | (table $db)->db_put ($key => $data) |
194 | } |
229 | } |
195 | |
230 | |
196 | sub do_table { |
231 | sub do_table { |
197 | my ($db) = @_; |
232 | my ($db) = @_; |
… | |
… | |
231 | } |
266 | } |
232 | |
267 | |
233 | die "maximum number of transaction retries reached - database problems?"; |
268 | die "maximum number of transaction retries reached - database problems?"; |
234 | } |
269 | } |
235 | |
270 | |
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271 | sub do_unlink { |
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272 | unlink $_[0]; |
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273 | } |
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274 | |
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275 | sub do_write_file { |
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276 | my ($file, $data) = @_; |
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277 | |
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278 | utf8::downgrade $file; |
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279 | utf8::downgrade $data; |
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280 | open my $fh, ">:raw", $file |
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281 | or return; |
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282 | print $fh $data; |
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283 | close $fh; |
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284 | |
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285 | 1 |
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286 | } |
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287 | |
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288 | sub do_prefetch_file { |
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289 | my ($file, $size) = @_; |
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290 | |
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291 | utf8::downgrade $file; |
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292 | open my $fh, "<:raw", $file |
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293 | or return; |
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294 | sysread $fh, my $buf, $size; |
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295 | |
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296 | 1 |
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297 | } |
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298 | |
236 | sub run { |
299 | sub run { |
237 | ($FH, my $fh) = CFPlus::socketpipe; |
300 | ($FH, my $fh) = CFPlus::socketpipe; |
238 | |
301 | |
239 | my $oldfh = select $FH; $| = 1; select $oldfh; |
302 | my $oldfh = select $FH; $| = 1; select $oldfh; |
240 | my $oldfh = select $fh; $| = 1; select $oldfh; |
303 | my $oldfh = select $fh; $| = 1; select $oldfh; |
… | |
… | |
245 | local $SIG{__DIE__}; |
308 | local $SIG{__DIE__}; |
246 | eval { |
309 | eval { |
247 | close $FH; |
310 | close $FH; |
248 | |
311 | |
249 | unless (eval { open_db }) { |
312 | unless (eval { open_db }) { |
250 | File::Path::rmtree $DB_HOME; |
313 | eval { File::Path::rmtree $DB_HOME }; |
251 | open_db; |
314 | open_db; |
252 | } |
315 | } |
253 | |
316 | |
254 | while () { |
317 | while () { |
255 | 4 == read $fh, my $len, 4 |
318 | 4 == read $fh, my $len, 4 |
… | |
… | |
284 | close $fh; |
347 | close $fh; |
285 | CFPlus::fh_nonblocking $FH, 1; |
348 | CFPlus::fh_nonblocking $FH, 1; |
286 | |
349 | |
287 | $CB{die} = sub { die shift }; |
350 | $CB{die} = sub { die shift }; |
288 | |
351 | |
289 | $fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read); |
352 | $fh_r_watcher = Event->io (fd => $FH, poll => 'r', nice => 1, cb => \&fh_read); |
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353 | $fh_w_watcher = Event->io (fd => $FH, poll => 'w', nice => -1, parked => 1, cb => \&fh_write); |
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354 | $SYNC->start; |
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355 | } |
290 | |
356 | |
291 | sync_tick; |
357 | sub stop { |
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358 | close $FH; |
292 | } |
359 | } |
293 | |
360 | |
294 | 1; |
361 | 1; |
295 | |
362 | |
296 | =back |
363 | =back |