02-21-2010
Let me get this straight: you have a custom memory management library, and your code using that library crashes?
OK.
You need all the help you can get. But there's not much out there.
Your only hope is to do something like download a demo copy of Purify and use it. And then pray that you don't have any bugs in your custom library.
And good luck.
You're going to need it.
There's a reason why nobody writes their own memory management libraries. First off, the multiple libraries available for free on your OS of choice are almost certainly fast enough. If they're not, you're most likely doing something wrong, like an over-reliance on malloc()/free() and/or new/delete. And if the OS libaries truly aren't fast enough (and if you're not multithreaded on a massively parallel application, they ARE fast enough!), there are third-party memory management libraries available.
Go price something like Smartheap. Then calculate all the hours spent on your custom memory library and how much those hours cost. Want to bet Smartheap is cheaper? If you even need it in the first place.
There are probably literally thousands of man-years invested by many absolutely brilliant computer scientists and programmers in all the memory-management libraries available in today's operating systems. And those products have been thoroughly tested - for literally decades.
You want a car analogy? Writing your own memory management library is like chiseling out a stone wheel for a sports car. The only reason to do it is for the sake of doing it - as a hobby or academic learning experience. Because there's no way you can duplicate the engineering history behind a "normal" wheel. Even if you do manage to chisel out a wheel that manages to outperform a "normal" wheel in a tiny operating range, you'll never really know how durable your wheel is because it's totally untested.
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LEARN ABOUT DEBIAN
poe::component::connection::keepalive
POE::Component::Connection::Keepalive(3pm) User Contributed Perl Documentation POE::Component::Connection::Keepalive(3pm)
NAME
POE::Component::Connection::Keepalive - a wheel wrapper around a kept-alive socket
VERSION
version 0.271
SYNOPSIS
See the SYNOPSIS for POE::Component::Client::Keepalive for a
complete working example.
my $connection = $response->{connection};
$heap->{connection} = $connection;
$connection->start( InputEvent => "got_input" );
delete $heap->{connection}; # When done with it.
DESCRIPTION
POE::Component::Connection::Keepalive is a helper class for POE::Component::Client::Keepalive. It wraps managed sockets, providing a few
extra features.
Connection objects free their underlying sockets when they are DESTROYed. This eliminates the need to explicitly free sockets when you are
done with them.
Connection objects manage POE::Wheel::ReadWrite objects internally, saving a bit of effort.
new
Creates a new POE::Component::Connection::Keepalive instance. It accepts two parameters: A socket handle (socket) and a reference to a
POE::Component::Client::Keepalive object to manage the socket when the connection is destroyed.
my $conn = POE::Component::Connection::Keepalive->new(
socket => $socket_handle,
manager => $poe_component_client_keepalive,
);
new() is usually called by a POE::Component::Client::Keepalive object.
start
Starts a POE::Wheel::ReadWrite object. All parameters except Handle for start() are passed directly to POE::Wheel::ReadWrite's
constructor. Handle is provided by the connection object. start() returns a reference to the new POE::Wheel::ReadWrite object, but it
is not necessary to save a copy of that wheel. The connection object keeps a copy of the reference internally, so the wheel will persist
as long as the connection does. The POE::Wheel::ReadWrite object will be DESTROYed when the connection object is.
# Asynchronous connection from Client::Keepalive.
sub handle_connection {
my $connection_info = $_[ARG0];
$_[HEAP]->{connection} = $connection_info->{connection};
$heap->{connection}->start(
InputEvent => "got_input",
ErrorEvent => "got_error",
);
}
# Stop the connection (and the wheel) when an error occurs.
sub handle_error {
delete $_[HEAP]->{connection};
}
wheel
Returns a reference to the internal POE::Wheel::ReadWrite object, so that methods may be called upon it.
$heap->{connection}->wheel()->pause_input();
close
Closes the connection immediately. Calls shutdown_input() and shutdown_output() on the wheel also.
SEE ALSO
POE POE::Component::Client::Keepalive POE::Wheel::ReadWrite
BUGS
None known.
LICENSE
This distribution is copyright 2004-2009 by Rocco Caputo. All rights are reserved. This distribution is free software; you may
redistribute it and/or modify it under the same terms as Perl itself.
AUTHOR
Rocco Caputo <rcaputo@cpan.org>
Special thanks to Rob Bloodgood.
perl v5.14.2 2012-05-15 POE::Component::Connection::Keepalive(3pm)