CORBA::ORB_init() hangs when called inside a DLL's DllMain() method

Dominique Sacre · 2013-05-17T17:45:00+00:00

Summary This article clarifies the use of ORB_init() inside a Dynamic Load Library (DLL). Article Number 36408 Environment Orbix 6.3 C Windows Question/Problem Description CORBA::ORB_init() hangs when called inside a DLL's DllMain() method.Where should ORB_init() be called in order to initialize an ORB? Clarifying Information The DllMain() is an optional entry point into a dynamic-link library (DLL). When the system starts or terminates a process or thread, it calls the entry-point function for each loaded DLL using the first thread of the process. The system also calls the entry-point function for a DLL when it is loaded or unloaded using the LoadLibrary and FreeLibrary functions. There are serious limits on what can be done in a DLL entry point. If more complex initialization is required, create an initialization routine for the DLL, this initialization routine should be called by applications before calling any other routines in the DLL. Error Message Defect/Enhancement Number Cause Resolution ORB_init() must not be called inside a DLL's DllMain() method, as this can cause serious issues and deadlocks due to the loader lock that DLLMain() is called under.An ORB should be initialized by calling ORB_init() from the main function of an application. Workaround Notes For further information, please see"Best Practices for Creating DLLs":http://msdn.microsoft.com/en-us/library/windows/hardware/gg487379.aspx and DLLMain docs athttp://msdn.microsoft.com/en-us/library/windows/desktop/ms682583(v=vs.85).aspx Attachment Created date: 22 November 2012 Last Modified: 12 February 2013 Last Published: 22 November 2012 First Published date: 22 November 2012 #Orbix#KnowledgeDocs

Summary	This article clarifies the use of ORB_init() inside a Dynamic Load Library (DLL).
Article Number	36408
Environment	Orbix 6.3 C Windows
Question/Problem Description	CORBA::ORB_init() hangs when called inside a DLL's DllMain() method. Where should ORB_init() be called in order to initialize an ORB?
Clarifying Information	The DllMain() is an optional entry point into a dynamic-link library (DLL). When the system starts or terminates a process or thread, it calls the entry-point function for each loaded DLL using the first thread of the process. The system also calls the entry-point function for a DLL when it is loaded or unloaded using the LoadLibrary and FreeLibrary functions. There are serious limits on what can be done in a DLL entry point. If more complex initialization is required, create an initialization routine for the DLL, this initialization routine should be called by applications before calling any other routines in the DLL.
Error Message
Defect/Enhancement Number
Cause
Resolution	ORB_init() must not be called inside a DLL's DllMain() method, as this can cause serious issues and deadlocks due to the loader lock that DLLMain() is called under. An ORB should be initialized by calling ORB_init() from the main function of an application.
Workaround
Notes	For further information, please see "Best Practices for Creating DLLs": http://msdn.microsoft.com/en-us/library/windows/hardware/gg487379.aspx and DLLMain docs at http://msdn.microsoft.com/en-us/library/windows/desktop/ms682583(v=vs.85).aspx
Attachment

Created date:	22 November 2012
Last Modified:	12 February 2013
Last Published:	22 November 2012
First Published date:	22 November 2012

#Orbix
#KnowledgeDocs

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