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=head1 NAME |
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|
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Coro::BDB - truly asynchronous bdb access |
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|
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=head1 SYNOPSIS |
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|
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use Coro::BDB; |
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use BDB; |
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|
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# can now use any of the bdb requests |
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|
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=head1 DESCRIPTION |
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|
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This module is an L<AnyEvent> user, you need to make sure that you use and |
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run a supported event loop. |
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|
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This module implements a thin wrapper around the L<BDB> module: Each BDB |
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request that could block and doesn't get passed a callback will normally |
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block all coroutines. after loading this module, this will no longer be |
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the case (it provides a suitable sync prepare callback). |
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|
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It will also register an AnyEvent watcher as soon as AnyEvent chooses an |
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event loop. |
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|
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The AnyEvent watcher can be disabled by executing C<undef |
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$Coro::BDB::WATCHER>. Please notify the author of when and why you think |
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this was necessary. |
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|
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This module does not export anything (unlike L<Coro::AIO>), as BDB already |
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supports leaving out the callback. (Unfortunately, it ties a C context |
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to each coroutine executing such a callback, so in the future, it might |
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export more efficient wrappers). |
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|
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=over 4 |
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|
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=cut |
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|
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package Coro::BDB; |
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|
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use common::sense; |
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|
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use BDB (); |
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use AnyEvent::BDB (); |
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|
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use Coro (); |
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use Coro::AnyEvent (); |
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|
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use base Exporter::; |
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|
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our $VERSION = 6.57; |
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our $WATCHER; |
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|
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BDB::set_sync_prepare { |
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my $cb = Coro::rouse_cb; |
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( |
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sub { $cb->($!) }, |
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sub { $! = Coro::rouse_wait }, |
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) |
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}; |
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|
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=back |
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=head1 SEE ALSO |
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|
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L<BDB> of course. |
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|
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=head1 AUTHOR/SUPPORT/CONTACT |
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|
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Marc A. Lehmann <schmorp@schmorp.de> |
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http://software.schmorp.de/pkg/Coro.html |
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|
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=cut |
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