FAQ-0758 Why can't I resume a thread after it has suspended itself?


FAQ-0758 Why can't I resume a thread after it has suspended itself?

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Classification:	C++	Category:	Threads & Processes
Created:	12/19/2001	Modified:	09/11/2002
Number:	FAQ-0758
Platform:	Symbian OS v6.0

Question:
On the Crystal v6.0 emulator, if a secondary thread suspends itself via a call to
RThread thisthread;
thisthread.Suspend();
this suspends the secondary thread OK. But when I try to resume it again from a primary thread via a call to RThread.Resume() a Plat::Panic KERN RE_ENTRANT occurs. Why is this?

Answer:
This is a defect in the v6.0 emulator. It has been fixed for v6.1. The only work around is to ensure in WINS code that the thread is always suspended by a second thread, not by itself.