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27 | db_sync $db; |
27 | db_sync $db; |
28 | |
28 | |
29 | # when you also use Coro, management is easy: |
29 | # when you also use Coro, management is easy: |
30 | use Coro::BDB; |
30 | use Coro::BDB; |
31 | |
31 | |
32 | # automatic result processing with AnyEvent: |
32 | # automatic event loop intergration with AnyEvent: |
33 | our $FH; open $FH, "<&=" . BDB::poll_fileno; |
33 | use AnyEvent::BDB; |
34 | our $WATCHER = AnyEvent->io (fh => $FH, poll => 'r', cb => \&BDB::poll_cb); |
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35 | |
34 | |
36 | # automatic result processing with EV: |
35 | # automatic result processing with EV: |
37 | my $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb; |
36 | my $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb; |
38 | |
37 | |
39 | # with Glib: |
38 | # with Glib: |
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110 | use strict 'vars'; |
109 | use strict 'vars'; |
111 | |
110 | |
112 | use base 'Exporter'; |
111 | use base 'Exporter'; |
113 | |
112 | |
114 | BEGIN { |
113 | BEGIN { |
115 | our $VERSION = '1.41'; |
114 | our $VERSION = '1.5'; |
116 | |
115 | |
117 | our @BDB_REQ = qw( |
116 | our @BDB_REQ = qw( |
118 | db_env_open db_env_close db_env_txn_checkpoint db_env_lock_detect |
117 | db_env_open db_env_close db_env_txn_checkpoint db_env_lock_detect |
119 | db_env_memp_sync db_env_memp_trickle |
118 | db_env_memp_sync db_env_memp_trickle |
120 | db_open db_close db_compact db_sync db_upgrade |
119 | db_open db_close db_compact db_sync db_upgrade |
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134 | |
133 | |
135 | require XSLoader; |
134 | require XSLoader; |
136 | XSLoader::load ("BDB", $VERSION); |
135 | XSLoader::load ("BDB", $VERSION); |
137 | } |
136 | } |
138 | |
137 | |
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138 | =head2 WIN32 FILENAMES/DATABASE NAME MESS |
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139 | |
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140 | Perl on Win32 supports only ASCII filenames (the reason is that it abuses |
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141 | an internal flag to store wether a filename is Unicode or ANSI, but that |
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142 | flag is used for somethign else in the perl core, so there is no way to |
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143 | detect wether a filename is ANSI or Unicode-encoded). The BDB module |
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144 | tries to work around this issue by assuming that the filename is an ANSI |
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145 | filename and BDB was built for unicode support. |
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146 | |
139 | =head2 BERKELEYDB FUNCTIONS |
147 | =head2 BERKELEYDB FUNCTIONS |
140 | |
148 | |
141 | All of these are functions. The create functions simply return a new |
149 | All of these are functions. The create functions simply return a new |
142 | object and never block. All the remaining functions all take an optional |
150 | object and never block. All the remaining functions take an optional |
143 | callback as last argument. If it is missing, then the function will be |
151 | callback as last argument. If it is missing, then the function will be |
144 | executed synchronously. In both cases, C<$!> will reflect the return value |
152 | executed synchronously. In both cases, C<$!> will reflect the return value |
145 | of the function. |
153 | of the function. |
146 | |
154 | |
147 | BDB functions that cannot block (mostly functions that manipulate |
155 | BDB functions that cannot block (mostly functions that manipulate |
148 | settings) are method calls on the relevant objects, so the rule of thumb |
156 | settings) are method calls on the relevant objects, so the rule of thumb |
149 | is: if its a method, its not blocking, if its a function, it takes a |
157 | is: if it's a method, it's not blocking, if it's a function, it takes a |
150 | callback as last argument. |
158 | callback as last argument. |
151 | |
159 | |
152 | In the following, C<$int> signifies an integer return value, |
160 | In the following, C<$int> signifies an integer return value, |
153 | C<octetstring> is a "binary string" (i.e. a perl string with no character |
161 | C<octetstring> is a "binary string" (i.e. a perl string with no character |
154 | indices >255), C<U32> is an unsigned 32 bit integer, C<int> is some |
162 | indices >255), C<U32> is an unsigned 32 bit integer, C<int> is some |
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440 | =item $msg = BDB::strerror [$errno] |
448 | =item $msg = BDB::strerror [$errno] |
441 | |
449 | |
442 | Returns the string corresponding to the given errno value. If no argument |
450 | Returns the string corresponding to the given errno value. If no argument |
443 | is given, use C<$!>. |
451 | is given, use C<$!>. |
444 | |
452 | |
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453 | Note that the BDB module also patches the C<$!> variable directly, so you |
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454 | should be able to get a bdb error string by simply stringifying C<$!>. |
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455 | |
445 | =item $fileno = BDB::poll_fileno |
456 | =item $fileno = BDB::poll_fileno |
446 | |
457 | |
447 | Return the I<request result pipe file descriptor>. This filehandle must be |
458 | Return the I<request result pipe file descriptor>. This filehandle must be |
448 | polled for reading by some mechanism outside this module (e.g. Event or |
459 | polled for reading by some mechanism outside this module (e.g. Event or |
449 | select, see below or the SYNOPSIS). If the pipe becomes readable you have |
460 | select, see below or the SYNOPSIS). If the pipe becomes readable you have |
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710 | TXN_DEADLOCK flag will be set on the transaction. See C<db_txn_finish>, |
721 | TXN_DEADLOCK flag will be set on the transaction. See C<db_txn_finish>, |
711 | above. |
722 | above. |
712 | |
723 | |
713 | =head1 SEE ALSO |
724 | =head1 SEE ALSO |
714 | |
725 | |
715 | L<Coro::BDB>, L<IO::AIO>. |
726 | L<AnyEvent::BDB> (event loop integration), L<Coro::BDB> (more natural |
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727 | syntax), L<IO::AIO> (nice to have). |
716 | |
728 | |
717 | =head1 AUTHOR |
729 | =head1 AUTHOR |
718 | |
730 | |
719 | Marc Lehmann <schmorp@schmorp.de> |
731 | Marc Lehmann <schmorp@schmorp.de> |
720 | http://home.schmorp.de/ |
732 | http://home.schmorp.de/ |