| 1 |
root |
1.1 |
=head1 NAME |
| 2 |
|
|
|
| 3 |
|
|
Coro::BDB - truly asynchronous bdb access |
| 4 |
|
|
|
| 5 |
|
|
=head1 SYNOPSIS |
| 6 |
|
|
|
| 7 |
root |
1.8 |
use Coro::BDB; |
| 8 |
root |
1.1 |
use BDB; |
| 9 |
|
|
|
| 10 |
|
|
# can now use any of the bdb requests |
| 11 |
|
|
|
| 12 |
|
|
=head1 DESCRIPTION |
| 13 |
|
|
|
| 14 |
root |
1.5 |
This module is an L<AnyEvent> user, you need to make sure that you use and |
| 15 |
|
|
run a supported event loop. |
| 16 |
|
|
|
| 17 |
root |
1.7 |
This module implements a thin wrapper around the L<BDB> module: Each BDB |
| 18 |
|
|
request that could block and doesn't get passed a callback will normally |
| 19 |
|
|
block all coroutines. after loading this module, this will no longer be |
| 20 |
|
|
the case (it provides a suitable sync prepare callback). |
| 21 |
root |
1.1 |
|
| 22 |
root |
1.7 |
It will also register an AnyEvent watcher as soon as AnyEvent chooses an |
| 23 |
root |
1.6 |
event loop. |
| 24 |
root |
1.1 |
|
| 25 |
|
|
The AnyEvent watcher can be disabled by executing C<undef |
| 26 |
|
|
$Coro::BDB::WATCHER>. Please notify the author of when and why you think |
| 27 |
|
|
this was necessary. |
| 28 |
|
|
|
| 29 |
root |
1.7 |
This module does not export anything (unlike L<Coro::AIO>), as BDB already |
| 30 |
|
|
supports leaving out the callback. |
| 31 |
|
|
|
| 32 |
root |
1.1 |
=over 4 |
| 33 |
|
|
|
| 34 |
|
|
=cut |
| 35 |
|
|
|
| 36 |
|
|
package Coro::BDB; |
| 37 |
|
|
|
| 38 |
|
|
no warnings; |
| 39 |
|
|
use strict; |
| 40 |
|
|
|
| 41 |
|
|
use Coro (); |
| 42 |
root |
1.8 |
use AnyEvent::BDB (); |
| 43 |
root |
1.1 |
use BDB (); |
| 44 |
|
|
|
| 45 |
|
|
use base Exporter::; |
| 46 |
|
|
|
| 47 |
root |
1.10 |
our $VERSION = 4.73; |
| 48 |
root |
1.1 |
our $WATCHER; |
| 49 |
|
|
|
| 50 |
|
|
BDB::set_sync_prepare { |
| 51 |
|
|
my $status; |
| 52 |
|
|
my $current = $Coro::current; |
| 53 |
|
|
( |
| 54 |
|
|
sub { |
| 55 |
|
|
$status = $!; |
| 56 |
|
|
$current->ready; undef $current; |
| 57 |
|
|
}, |
| 58 |
|
|
sub { |
| 59 |
|
|
Coro::schedule while defined $current; |
| 60 |
|
|
$! = $status; |
| 61 |
|
|
}, |
| 62 |
|
|
) |
| 63 |
|
|
}; |
| 64 |
|
|
|
| 65 |
|
|
=back |
| 66 |
|
|
|
| 67 |
|
|
=head1 SEE ALSO |
| 68 |
|
|
|
| 69 |
|
|
L<BDB> of course. |
| 70 |
|
|
|
| 71 |
|
|
=head1 AUTHOR |
| 72 |
|
|
|
| 73 |
|
|
Marc Lehmann <schmorp@schmorp.de> |
| 74 |
|
|
http://home.schmorp.de/ |
| 75 |
|
|
|
| 76 |
|
|
=cut |
| 77 |
|
|
|
| 78 |
|
|
1 |
