Bug 2990

Summary:	ACE_Thread_Mutex + priority inheritance
Product:	ACE	Reporter:	Abdul Sowayan <abdullah.sowayan>
Component:	ACE Core	Assignee:	DOC Center Support List (internal) <tao-support>
Status:	NEW ---
Severity:	normal
Priority:	P3
Version:	5.5.9
Hardware:	All
OS:	All
Bug Depends on:
Bug Blocks:	2989

Description Abdul Sowayan 2007-07-16 16:02:20 CDT

The constructor of ACE_Thread_Mutex is as follows:

ACE_Thread_Mutex (const ACE_TCHAR *name=0, ACE_mutexattr_t *attributes=0)

Notice that there is an optional argument called attributes. What I'm trying to find out if there is a portable way under real-time operating systems to have ACE_Thread_Mutex employ a priority inheritance protocol to avoid the potential for priority inversion.

Is such a thing possible in ACE?

Thanks,
Abdul

Comment 1 Abdul Sowayan 2007-07-16 16:02:45 CDT

I don't think this is possible with ACE (yet), but it should probably be
added, e.g., by creating a new ACE_Priority_Inheritance_Thread_Mutex
class that uses ACE_Thread_Mutex and sets this attributes parameter
portably!

Thanks,

        Doug

Comment 2 Johnny Willemsen 2007-07-17 05:25:46 CDT

changed severity

Comment 3 Johnny Willemsen 2008-03-20 16:04:10 CDT

for example vxworks delivery a priority inversion algorithm, when creating the mutex you have to specify a special flag. Seems the best way to add a new class that wraps this.