exception handling Post: 52364

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Top Forums UNIX for Advanced & Expert Users exception handling Post 52364 by jim mcnamara on Wednesday 16th of June 2004 05:29:03 PM

06-16-2004

Registered User

Not exactly. The NT family of OSes throw exceptions which are handled by an exception vector. You can throw exceptions -- in the sense of software error trapping in Unix -- using C++ as well. It's no different from MSVC++ in that regard.

Unix creates signals - think of them as exactly like software interrupts -- to handle exceptions. This is not like the Windows message pump.

These signals are sent to a process, which then has a signal handler. It's like an exception vector (table) except that it's a single function that processes signals or lets them through.

On a Unix box, type "man signal" and it will explain a little bit about signal processing.

Here is a site with PDF's that go into some depth (it's for linux, which for signals, is just fine):

www.advancedlinuxprogramming.com

It's a whole book. You're gonna need it. If you're going to non-Linux, try Richard Stevens book 'Advanced Programming in the UNIX Environment'.

Good Luck---

The thing that's going to kill you is that NT(XP) was built from the ground up on threading. Unix was not.

pthreads are supported just fine in most Unix versions, and work well.

jim mcnamara

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net::server::proto::unix5.18

Net::Server::Proto::UNIX(3)				User Contributed Perl Documentation			       Net::Server::Proto::UNIX(3)

NAME

       Net::Server::Proto::UNIX - Net::Server UNIX protocol.

SYNOPSIS

       See Net::Server::Proto.

DESCRIPTION

       Protocol module for Net::Server.  This module implements the UNIX SOCK_STREAM socket type.  See Net::Server::Proto.

       Any sockets created during startup will be chown'ed to the user and group specified in the starup arguments.

PARAMETERS

       The following paramaters may be specified in addition to normal command line parameters for a Net::Server.  See Net::Server for more
       information on reading arguments.

       unix_type
	   Can be either SOCK_STREAM or SOCK_DGRAM (default is SOCK_STREAM).  This can also be passed on the port line (see Net::Server::Proto).

	   However, this method is deprecated.	If you want SOCK_STREAM - just use proto UNIX without any other arguments.  If you'd like
	   SOCK_DGRAM, use the new proto UNIXDGRAM.

METHODS

       NS_unix_path/NS_unix_type
	   In addition to the standard NS_ methods of Net::Server::Proto classes, the UNIX types also have legacy calls to NS_unix_path and
	   NS_unix_type.

	   Since version 2.000, NS_unix_path is simply an alias to NS_port.  NS_unix_type is now redundant with NS_proto.

	   These methods were missing between version 2.000 and 2.003 but have been returned as legacy bridges.

QUICK PARAMETER LIST

	 Key		   Value		    Default

	 # deprecated UNIX socket parameters
	 unix_type	   (SOCK_STREAM|SOCK_DGRAM) SOCK_STREAM
	 port		   "filename"		    undef

	 # more recent usage
	 port		   "filename / UNIX"
	 port		   "filename / UNIXDGRAM"

LICENCE

       Distributed under the same terms as Net::Server

perl v5.18.2							    2012-06-06					       Net::Server::Proto::UNIX(3)