Win32::Mutex - Use Win32 mutex objects from Perl
This document describes version 1.09 of Win32::Mutex, released November 15, 2014 as part of Win32-IPC version 1.11.
require Win32::Mutex; $mutex = Win32::Mutex->new($initial,$name); $mutex->wait;
This module allows access to the Win32 mutex objects. The
wait method and
wait_any functions are inherited from the Win32::IPC module.
Constructor for a new mutex object. If
$initial is true, requests immediate ownership of the mutex (default false). If
$name is omitted or
undef, creates an unnamed mutex object.
$name signifies an existing mutex object, then
$initial is ignored and the object is opened. If this happens,
$^E will be set to 183 (ERROR_ALREADY_EXISTS).
Constructor for opening an existing mutex object.
Release ownership of a
$mutex. You should have obtained ownership of the mutex through
new or one of the wait functions. Returns true if successful, or zero if it fails (additional error information can be found in
Wait for ownership of
$mutex. See Win32::IPC.
If this thread has already obtained ownership of
$mutex, additional calls to
wait will always succeed. You must call
release once for each successful call to
Win32::Mutex still supports the ActiveWare syntax, but its use is deprecated.
$MutObj = Win32::Mutex->new($Initial,$Name) instead.
$MutObj = Win32::Mutex->open($Name) instead.
Win32::Mutex requires no configuration files or environment variables.
It runs under 32-bit or 64-bit Microsoft Windows, either natively or under Cygwin.
Prior to version 1.06, the Win32 IPC modules treated
undef values differently. In version 1.06 and later, passing
undef as the value of an optional parameter is the same as omitting that parameter. In previous versions,
undef was interpreted as either the empty string or 0 (along with a warning about "Use of uninitialized value...").
Signal handlers will not be called during the
wait method. See "BUGS AND LIMITATIONS" in Win32::IPC for details.
Christopher J. Madsen
<perl AT cjmweb.net>
Please report any bugs or feature requests to
<bug-Win32-IPC AT rt.cpan.org> or through the web interface at http://rt.cpan.org/Public/Bug/Report.html?Queue=Win32-IPC.
You can follow or contribute to Win32-IPC's development at https://github.com/madsen/win32-ipc.
Loosely based on the original module by ActiveWare Internet Corp., http://www.ActiveState.com
Copyright 1998-2014 Christopher J. Madsen
Created: 3 Feb 1998 from the ActiveWare version (c) 1995 Microsoft Corporation. All rights reserved. Developed by ActiveWare Internet Corp., http://www.ActiveState.com
Other modifications (c) 1997 by Gurusamy Sarathy <gsar AT cpan.org>
This module is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
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