I have often used the algorithm described in LockFile::Simple by Rafael Manfredi which uses atomic operations of the file system. Not perfect but simple enough that it can be also implemented in pure shell (no external commands) which can be useful sometimes. It can even (mostly) work over NFS/NAS supposing a not-too-dumb NFS implementation.
The windows behavior is certainly confusing. what is the point of having a supposatly portable implementation of locking (perl's flock) if you cannot use it on some platform; I would rather have it die saying not implemented
so that one knows a work-around is needed. I think it's a bug (at least a documentation bug)
hth
--stephan
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|