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Full Discussion: Linux lock problem
Top Forums UNIX for Advanced & Expert Users Linux lock problem Post 302960327 by jim mcnamara on Friday 13th of November 2015 03:46:07 PM
Old 11-13-2015
Since you are in kernel mode context you most likely need a spinlock. What you have is called a critical section.

5.5. Spinlocks discusses spinlocks in general.

http://tuxthink.blogspot.com/2013/06...x-example.html

Since you asked this question I would recommend lots of reading on your own. FIRST. It is easy to crash or hang the system with slightly less than perfect code. Debugging kernel code can be painful, some debugging tools may still require using two physically separate computers.

It is easier to do your homework first. Write dirt simple code for practice, first.
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uri_urn(n)					    Tcl Uniform Resource Identifier Management						uri_urn(n)

__________________________________________________________________________________________________________________________________________________

NAME
uri_urn - URI utilities, URN scheme SYNOPSIS
package require Tcl 8.2 package require uri::urn ?1.1.2? uri::urn::quote url uri::urn::unquote url _________________________________________________________________ DESCRIPTION
This package provides two commands to quote and unquote the disallowed characters for url using the urn scheme, registers the scheme with the package uri, and provides internal helpers which will be automatically used by the commands uri::split and uri::join of package uri to handle urls using the urn scheme. COMMANDS
uri::urn::quote url This command quotes the characters disallowed by the urn scheme (per RFC 2141 sec2.2) in the url and returns the modified url as its result. uri::urn::unquote url This commands performs the reverse of ::uri::urn::quote. It takes an urn url, removes the quoting from all disallowed characters, and returns the modified urls as its result. BUGS, IDEAS, FEEDBACK This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category uri of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for either package and/or documentation. KEYWORDS
rfc 2141, uri, url, urn CATEGORY
Networking uri 1.1.2 uri_urn(n)
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