Debenu Quick PDF Library - PDF SDK Community Forum : Multithreading http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sat, 04 Apr 2026 16:49:42 +0000 Wed, 02 May 2012 20:42:21 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=2241 <![CDATA[Debenu Quick PDF Library - PDF SDK Community Forum]]> http://www.quickpdf.org/forum/forum_images/QPDF_Forum_Title.png http://www.quickpdf.org/forum/ <![CDATA[Multithreading : The catch with the function using...]]> http://www.quickpdf.org/forum/multithreading_topic2241_post9552.html#9552 Author: Wheeley
Subject: 2241
Posted: 02 May 12 at 8:42PM

The catch with the function using GDI+ is how you run your service. Microsoft might indeed be correct when you run the service using "Local Administrator". Because of other issues we require our service to run using a named user. So more investigation is needed by all.

Wheeley
]]> Wed, 02 May 2012 20:42:21 +0000 http://www.quickpdf.org/forum/multithreading_topic2241_post9552.html#9552 <![CDATA[Multithreading : Wheely,PrintDocument uses the...]]> http://www.quickpdf.org/forum/multithreading_topic2241_post9547.html#9547 Author: AndrewC
Subject: 2241
Posted: 02 May 12 at 3:38PM

Wheely,

PrintDocument uses the GDI+ functions to render the document for printing.  If it is working correctly for you then it seems Microsoft might are just being over cautious.  Not of the other functions you use would require GDI+.

Andrew.
]]> Wed, 02 May 2012 15:38:14 +0000 http://www.quickpdf.org/forum/multithreading_topic2241_post9547.html#9547 <![CDATA[Multithreading : We use the following when running...]]> http://www.quickpdf.org/forum/multithreading_topic2241_post9544.html#9544 Author: Wheeley
Subject: 2241
Posted: 30 Apr 12 at 11:49PM

We use the following when running in a service:

AddToFileList
AnalyseFile
ClearFileList
CompressContent
CreateLibrary
Decrypt
DecryptFile
DeleteAnalysis
DocumentCount
EncodePermissions
EncryptFile
EncryptionStatus
FileListItem
GetAnalysisInfo
GetDocumentID
LastErrorCode
LibraryVersion
LoadFromFile
MergeFileListFast
NewDocument
NewOutline
PageCount
PrintDocument
PrintOptions
RemoveDocument
SaveToFile
SelectDocument
SelectPage
SetPageLayout
SetPageMode
SetTempFile
SetTempPath
SignFile
TestTempPath
Unlock
UnlockKey


Wheeley
]]> Mon, 30 Apr 2012 23:49:32 +0000 http://www.quickpdf.org/forum/multithreading_topic2241_post9544.html#9544 <![CDATA[Multithreading : Also, we have recently completed...]]> http://www.quickpdf.org/forum/multithreading_topic2241_post9543.html#9543 Author: AndrewC
Subject: 2241
Posted: 30 Apr 12 at 4:09PM

Also, we have recently completed more extensive testing on the library for thread safety and have found a few small problems that have been fixed in the 8.15 release and there are further fixes coming for the 8.16 beta 1 release.

If each thread uses a new instance of QuickPDF Library then it should work pretty well when using 8.15 or 8.16 versions of QPL.
]]> Mon, 30 Apr 2012 16:09:22 +0000 http://www.quickpdf.org/forum/multithreading_topic2241_post9543.html#9543 <![CDATA[Multithreading : We haven&#039;t done any testing...]]> http://www.quickpdf.org/forum/multithreading_topic2241_post9542.html#9542 Author: AndrewC
Subject: 2241
Posted: 30 Apr 12 at 3:24PM

We haven't done any testing with using QPL in a Windows Service.

The GDI+ function calls in QPL are used for the Rendering and Printing functions.  

Wheeley -  Which QPL calls do you currently use in your Windows Service ?  This might help us and others work out which functions, if any, are unsafe to use in a Windows Service ?
]]> Mon, 30 Apr 2012 15:24:41 +0000 http://www.quickpdf.org/forum/multithreading_topic2241_post9542.html#9542 <![CDATA[Multithreading : Do you have a list of these functions?...]]> http://www.quickpdf.org/forum/multithreading_topic2241_post9534.html#9534 Author: Wheeley
Subject: 2241
Posted: 26 Apr 12 at 11:32PM

Do you have a list of these functions? My company is using it in a service and so far we have not had any problems. But I'd like to very for sure we wouldn't.

Wheeley
]]> Thu, 26 Apr 2012 23:32:42 +0000 http://www.quickpdf.org/forum/multithreading_topic2241_post9534.html#9534 <![CDATA[Multithreading : Running QPL in a service could...]]> http://www.quickpdf.org/forum/multithreading_topic2241_post9528.html#9528 Author: AndrewC
Subject: 2241
Posted: 26 Apr 12 at 1:14PM


Running QPL in a service could be a problem because we use GDI+ for many PDF functions.

From http://msdn.microsoft.com/en-us/library/ms533798(v=vs.85).aspx

"GDI+ functions and classes are not supported for use within a Windows service. Attempting to use these functions and classes from a Windows service may produce unexpected problems, such as diminished service performance and run-time exceptions or errors."
]]> Thu, 26 Apr 2012 13:14:35 +0000 http://www.quickpdf.org/forum/multithreading_topic2241_post9528.html#9528 <![CDATA[Multithreading : If this library tread safe? I...]]> http://www.quickpdf.org/forum/multithreading_topic2241_post9513.html#9513 Author: alecd4
Subject: 2241
Posted: 21 Apr 12 at 10:47PM

If this library tread safe? I am using the library in a windows service (C#) where I can have multiple threads that create/update pdf documents. 

Don't see any problems so far. Should I expect any?
]]> Sat, 21 Apr 2012 22:47:41 +0000 http://www.quickpdf.org/forum/multithreading_topic2241_post9513.html#9513