CreateMutex plug-in: Difference between revisions
From NSIS Wiki
Jump to navigationJump to search
(→Links) |
m (Added link to alternative code page.) |
||
| (3 intermediate revisions by 2 users not shown) | |||
| Line 4: | Line 4: | ||
[[Image:Zip.gif]] [http://forums.winamp.com/attachment.php?s=&postid=1225386 nsapicreatemutex.zip] (2 KB) | [[Image:Zip.gif]] [http://forums.winamp.com/attachment.php?s=&postid=1225386 nsapicreatemutex.zip] (2 KB) | ||
[http://forums.winamp.com/showthread.php?postid=1225386#post1225386 Forum thread] (where | [http://forums.winamp.com/showthread.php?postid=1225386#post1225386 Forum thread] (where discussions about the contribution should be posted) | ||
Also | '''Also see:''' [[Allow only one installer instance]] (uses [[System plug-in]] instead of a separate plug-in) | ||
== Description == | == Description == | ||
Latest revision as of 20:21, 20 January 2006
Links
Download link:
nsapicreatemutex.zip (2 KB)
Forum thread (where discussions about the contribution should be posted)
Also see: Allow only one installer instance (uses System plug-in instead of a separate plug-in)
Description
Version: 1.0.
This plug-in has ability to create a mutex (also called as a mutual exclusion), allowing the installer to restrict its number of instances allowed in the system.
How to use
CreateMutex::nsCreateMutex ["MutexName" ["OptionalParameter"]]
Pop "ResultVar"
- Creates a mutex for the installer.
- MutexName
- Specifies a mutex name. If it's "?", it returns instructions of how to use the plug-in.
- OptionalParameter
- Can specify one of the options below relating to the return value:
- "1": Returns the Windows error code number if there is errors, or 0 otherwise.
- "2": Returns the message "MUTEX_EXISTS" if there is errors, or "MUTEX_SET" otherwise.
- "3": Returns the Windows error message for the operation.
- Can specify one of the options below relating to the return value:
- Default is "2".
- ResultVar
- Variable where the result indicated by the parameter OptionalParameter is returned. If MutextName is "?", then the result returned is a blank value.
Versions History
- 1.0 - 02/Jan/2004
- First version of the plug-in.
Credits
Plug-in created by billym.
License
Copyright (C) 2004 billym This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any source distribution.
