ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/BDB/BDB.pm
(Generate patch)

Comparing BDB/BDB.pm (file contents):
Revision 1.19 by root, Wed Dec 5 13:01:46 2007 UTC vs.
Revision 1.32 by root, Sun Mar 30 04:34:20 2008 UTC

… …
24 db_put $db, undef, "key", "data", 0, sub { 24 db_put $db, undef, "key", "data", 0, sub {
25 db_del $db, undef, "key"; 25 db_del $db, undef, "key";
26 }; 26 };
27 db_sync $db; 27 db_sync $db;
28 28
29 # when you also use Coro, management is easy:
30 use Coro::BDB;
31
29 # automatic result processing with AnyEvent: 32 # automatic result processing with AnyEvent:
30 our $FH; open $FH, "<&=" . BDB::poll_fileno; 33 our $FH; open $FH, "<&=" . BDB::poll_fileno;
31 our $WATCHER = AnyEvent->io (fh => $FH, poll => 'r', cb => \&BDB::poll_cb); 34 our $WATCHER = AnyEvent->io (fh => $FH, poll => 'r', cb => \&BDB::poll_cb);
32 35
33 # automatic result processing with EV: 36 # automatic result processing with EV:
… …
107use strict 'vars'; 110use strict 'vars';
108 111
109use base 'Exporter'; 112use base 'Exporter';
110 113
111BEGIN { 114BEGIN {
112 our $VERSION = '1.2'; 115 our $VERSION = '1.44';
113 116
114 our @BDB_REQ = qw( 117 our @BDB_REQ = qw(
115 db_env_open db_env_close db_env_txn_checkpoint db_env_lock_detect 118 db_env_open db_env_close db_env_txn_checkpoint db_env_lock_detect
116 db_env_memp_sync db_env_memp_trickle 119 db_env_memp_sync db_env_memp_trickle
117 db_open db_close db_compact db_sync db_put db_get db_pget db_del db_key_range 120 db_open db_close db_compact db_sync db_upgrade
121 db_put db_get db_pget db_del db_key_range
118 db_txn_commit db_txn_abort db_txn_finish 122 db_txn_commit db_txn_abort db_txn_finish
119 db_c_close db_c_count db_c_put db_c_get db_c_pget db_c_del 123 db_c_close db_c_count db_c_put db_c_get db_c_pget db_c_del
120 db_sequence_open db_sequence_close 124 db_sequence_open db_sequence_close
121 db_sequence_get db_sequence_remove 125 db_sequence_get db_sequence_remove
122 ); 126 );
… …
134 138
135=head2 BERKELEYDB FUNCTIONS 139=head2 BERKELEYDB FUNCTIONS
136 140
137All of these are functions. The create functions simply return a new 141All of these are functions. The create functions simply return a new
138object and never block. All the remaining functions all take an optional 142object and never block. All the remaining functions all take an optional
139callback as last argument. If it is missing, then the fucntion will be 143callback as last argument. If it is missing, then the function will be
140executed synchronously. 144executed synchronously. In both cases, C<$!> will reflect the return value
145of the function.
141 146
142BDB functions that cannot block (mostly functions that manipulate 147BDB functions that cannot block (mostly functions that manipulate
143settings) are method calls on the relevant objects, so the rule of thumb 148settings) are method calls on the relevant objects, so the rule of thumb
144is: if its a method, its not blocking, if its a function, it takes a 149is: if its a method, its not blocking, if its a function, it takes a
145callback as last argument. 150callback as last argument.
… …
180 185
181 db_open (DB *db, DB_TXN_ornull *txnid, octetstring file, octetstring database, int type, U32 flags, int mode, SV *callback = &PL_sv_undef) 186 db_open (DB *db, DB_TXN_ornull *txnid, octetstring file, octetstring database, int type, U32 flags, int mode, SV *callback = &PL_sv_undef)
182 flags: AUTO_COMMIT CREATE EXCL MULTIVERSION NOMMAP RDONLY READ_UNCOMMITTED THREAD TRUNCATE 187 flags: AUTO_COMMIT CREATE EXCL MULTIVERSION NOMMAP RDONLY READ_UNCOMMITTED THREAD TRUNCATE
183 db_close (DB *db, U32 flags = 0, SV *callback = &PL_sv_undef) 188 db_close (DB *db, U32 flags = 0, SV *callback = &PL_sv_undef)
184 flags: DB_NOSYNC 189 flags: DB_NOSYNC
190 db_upgrade (DB *db, octetstring file, U32 flags = 0, SV *callback = &PL_sv_undef)
185 db_compact (DB *db, DB_TXN_ornull *txn = 0, SV *start = 0, SV *stop = 0, SV *unused1 = 0, U32 flags = DB_FREE_SPACE, SV *unused2 = 0, SV *callback = &PL_sv_undef) 191 db_compact (DB *db, DB_TXN_ornull *txn = 0, SV *start = 0, SV *stop = 0, SV *unused1 = 0, U32 flags = DB_FREE_SPACE, SV *unused2 = 0, SV *callback = &PL_sv_undef)
186 flags: FREELIST_ONLY FREE_SPACE 192 flags: FREELIST_ONLY FREE_SPACE
187 db_sync (DB *db, U32 flags = 0, SV *callback = &PL_sv_undef) 193 db_sync (DB *db, U32 flags = 0, SV *callback = &PL_sv_undef)
188 db_key_range (DB *db, DB_TXN_ornull *txn, SV *key, SV *key_range, U32 flags = 0, SV *callback = &PL_sv_undef) 194 db_key_range (DB *db, DB_TXN_ornull *txn, SV *key, SV *key_range, U32 flags = 0, SV *callback = &PL_sv_undef)
189 db_put (DB *db, DB_TXN_ornull *txn, SV *key, SV *data, U32 flags = 0, SV *callback = &PL_sv_undef) 195 db_put (DB *db, DB_TXN_ornull *txn, SV *key, SV *data, U32 flags = 0, SV *callback = &PL_sv_undef)
… …
277 $int = $env->set_lk_max_lockers (U32 max) 283 $int = $env->set_lk_max_lockers (U32 max)
278 $int = $env->set_lk_max_locks (U32 max) 284 $int = $env->set_lk_max_locks (U32 max)
279 $int = $env->set_lk_max_objects (U32 max) 285 $int = $env->set_lk_max_objects (U32 max)
280 $int = $env->set_lg_bsize (U32 max) 286 $int = $env->set_lg_bsize (U32 max)
281 $int = $env->set_lg_max (U32 max) 287 $int = $env->set_lg_max (U32 max)
288 $int = $env->mutex_set_increment (U32 increment)
289 $int = $env->mutex_set_tas_spins (U32 tas_spins)
290 $int = $env->mutex_set_max (U32 max)
291 $int = $env->mutex_set_align (U32 align)
282 292
283 $txn = $env->txn_begin (DB_TXN_ornull *parent = 0, U32 flags = 0) 293 $txn = $env->txn_begin (DB_TXN_ornull *parent = 0, U32 flags = 0)
284 flags: READ_COMMITTED READ_UNCOMMITTED TXN_NOSYNC TXN_NOWAIT TXN_SNAPSHOT TXN_SYNC TXN_WAIT TXN_WRITE_NOSYNC 294 flags: READ_COMMITTED READ_UNCOMMITTED TXN_NOSYNC TXN_NOWAIT TXN_SNAPSHOT TXN_SYNC TXN_WAIT TXN_WRITE_NOSYNC
285 295
286=head4 Example: 296=head4 Example:
… …
381 DESTROY (DBC_ornull *dbc) 391 DESTROY (DBC_ornull *dbc)
382 CODE: 392 CODE:
383 if (dbc) 393 if (dbc)
384 dbc->c_close (dbc); 394 dbc->c_close (dbc);
385 395
396 $int = $cursor->set_priority ($priority = PRIORITY_*)
397
386=head4 Example: 398=head4 Example:
387 399
388 my $c = $db->cursor; 400 my $c = $db->cursor;
389 401
390 for (;;) { 402 for (;;) {
… …
422=head2 SUPPORT FUNCTIONS 434=head2 SUPPORT FUNCTIONS
423 435
424=head3 EVENT PROCESSING AND EVENT LOOP INTEGRATION 436=head3 EVENT PROCESSING AND EVENT LOOP INTEGRATION
425 437
426=over 4 438=over 4
439
440=item $msg = BDB::strerror [$errno]
441
442Returns the string corresponding to the given errno value. If no argument
443is given, use C<$!>.
427 444
428=item $fileno = BDB::poll_fileno 445=item $fileno = BDB::poll_fileno
429 446
430Return the I<request result pipe file descriptor>. This filehandle must be 447Return the I<request result pipe file descriptor>. This filehandle must be
431polled for reading by some mechanism outside this module (e.g. Event or 448polled for reading by some mechanism outside this module (e.g. Event or
… …
659 676
660In short: the parent will, after a short pause, continue as if fork had 677In short: the parent will, after a short pause, continue as if fork had
661not been called, while the child will act as if BDB has not been used 678not been called, while the child will act as if BDB has not been used
662yet. 679yet.
663 680
681Win32 note: there is no fork on win32, and perls emulation of it is too
682broken to be supported, so do not use BDB in a windows pseudo-fork, better
683yet, switch to a more capable platform.
684
664=head2 MEMORY USAGE 685=head2 MEMORY USAGE
665 686
666Per-request usage: 687Per-request usage:
667 688
668Each aio request uses - depending on your architecture - around 100-200 689Each aio request uses - depending on your architecture - around 100-200

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines