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Comparing BDB/BDB.pm (file contents):
Revision 1.22 by root, Mon Dec 10 03:57:27 2007 UTC vs.
Revision 1.27 by root, Tue Dec 11 02:32:50 2007 UTC

… …
107use strict 'vars'; 107use strict 'vars';
108 108
109use base 'Exporter'; 109use base 'Exporter';
110 110
111BEGIN { 111BEGIN {
112 our $VERSION = '1.3'; 112 our $VERSION = '1.4';
113 113
114 our @BDB_REQ = qw( 114 our @BDB_REQ = qw(
115 db_env_open db_env_close db_env_txn_checkpoint db_env_lock_detect 115 db_env_open db_env_close db_env_txn_checkpoint db_env_lock_detect
116 db_env_memp_sync db_env_memp_trickle 116 db_env_memp_sync db_env_memp_trickle
117 db_open db_close db_compact db_sync db_put db_get db_pget db_del db_key_range 117 db_open db_close db_compact db_sync db_upgrade
118 db_put db_get db_pget db_del db_key_range
118 db_txn_commit db_txn_abort db_txn_finish 119 db_txn_commit db_txn_abort db_txn_finish
119 db_c_close db_c_count db_c_put db_c_get db_c_pget db_c_del 120 db_c_close db_c_count db_c_put db_c_get db_c_pget db_c_del
120 db_sequence_open db_sequence_close 121 db_sequence_open db_sequence_close
121 db_sequence_get db_sequence_remove 122 db_sequence_get db_sequence_remove
122 ); 123 );
… …
134 135
135=head2 BERKELEYDB FUNCTIONS 136=head2 BERKELEYDB FUNCTIONS
136 137
137All of these are functions. The create functions simply return a new 138All of these are functions. The create functions simply return a new
138object and never block. All the remaining functions all take an optional 139object and never block. All the remaining functions all take an optional
139callback as last argument that gets passed the return value. If it is 140callback as last argument. If it is missing, then the function will be
140missing, then the function will be executed synchronously, and the return 141executed synchronously. In both cases, C<$!> will reflect the return value
141value is returned as normally. 142of the function.
142 143
143BDB functions that cannot block (mostly functions that manipulate 144BDB functions that cannot block (mostly functions that manipulate
144settings) are method calls on the relevant objects, so the rule of thumb 145settings) are method calls on the relevant objects, so the rule of thumb
145is: if its a method, its not blocking, if its a function, it takes a 146is: if its a method, its not blocking, if its a function, it takes a
146callback as last argument. 147callback as last argument.
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181 182
182 db_open (DB *db, DB_TXN_ornull *txnid, octetstring file, octetstring database, int type, U32 flags, int mode, SV *callback = &PL_sv_undef) 183 db_open (DB *db, DB_TXN_ornull *txnid, octetstring file, octetstring database, int type, U32 flags, int mode, SV *callback = &PL_sv_undef)
183 flags: AUTO_COMMIT CREATE EXCL MULTIVERSION NOMMAP RDONLY READ_UNCOMMITTED THREAD TRUNCATE 184 flags: AUTO_COMMIT CREATE EXCL MULTIVERSION NOMMAP RDONLY READ_UNCOMMITTED THREAD TRUNCATE
184 db_close (DB *db, U32 flags = 0, SV *callback = &PL_sv_undef) 185 db_close (DB *db, U32 flags = 0, SV *callback = &PL_sv_undef)
185 flags: DB_NOSYNC 186 flags: DB_NOSYNC
187 db_upgrade (DB *db, octetstring file, U32 flags = 0, SV *callback = &PL_sv_undef)
186 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) 188 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)
187 flags: FREELIST_ONLY FREE_SPACE 189 flags: FREELIST_ONLY FREE_SPACE
188 db_sync (DB *db, U32 flags = 0, SV *callback = &PL_sv_undef) 190 db_sync (DB *db, U32 flags = 0, SV *callback = &PL_sv_undef)
189 db_key_range (DB *db, DB_TXN_ornull *txn, SV *key, SV *key_range, U32 flags = 0, SV *callback = &PL_sv_undef) 191 db_key_range (DB *db, DB_TXN_ornull *txn, SV *key, SV *key_range, U32 flags = 0, SV *callback = &PL_sv_undef)
190 db_put (DB *db, DB_TXN_ornull *txn, SV *key, SV *data, U32 flags = 0, SV *callback = &PL_sv_undef) 192 db_put (DB *db, DB_TXN_ornull *txn, SV *key, SV *data, U32 flags = 0, SV *callback = &PL_sv_undef)
… …
428 430
429=head3 EVENT PROCESSING AND EVENT LOOP INTEGRATION 431=head3 EVENT PROCESSING AND EVENT LOOP INTEGRATION
430 432
431=over 4 433=over 4
432 434
435=item $msg = BDB::strerror [$errno]
436
437Returns the string corresponding to the given errno value. If no argument
438is given, use C<$!>.
439
433=item $fileno = BDB::poll_fileno 440=item $fileno = BDB::poll_fileno
434 441
435Return the I<request result pipe file descriptor>. This filehandle must be 442Return the I<request result pipe file descriptor>. This filehandle must be
436polled for reading by some mechanism outside this module (e.g. Event or 443polled for reading by some mechanism outside this module (e.g. Event or
437select, see below or the SYNOPSIS). If the pipe becomes readable you have 444select, see below or the SYNOPSIS). If the pipe becomes readable you have
… …
664 671
665In short: the parent will, after a short pause, continue as if fork had 672In short: the parent will, after a short pause, continue as if fork had
666not been called, while the child will act as if BDB has not been used 673not been called, while the child will act as if BDB has not been used
667yet. 674yet.
668 675
676Win32 note: there is no fork on win32, and perls emulation of it is too
677broken to be supported, so do not use BDB in a windows pseudo-fork, better
678yet, switch to a more capable platform.
679
669=head2 MEMORY USAGE 680=head2 MEMORY USAGE
670 681
671Per-request usage: 682Per-request usage:
672 683
673Each aio request uses - depending on your architecture - around 100-200 684Each aio request uses - depending on your architecture - around 100-200

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