[Bug 43728] Magic: The Gathering Online intensive CPU usage when idle

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=43728

--- Comment #11 from Panard <panard at inzenet.org> ---
So here is what is happening:

1. Call to CoWaitForMultipleHandles (ole32/compobj.c)
2. Enters while(TRUE) section with message_loop = TRUE
3. Call MsgWaitForMultipleObjectsEx (line 4513 of vanilla git)
4. Returns WAIT_OBJECT_0 + cHandles, enters the if section (line 4517)
5. COM_CurrentApt()->filter is false
6. Call to COM_PeekMessage
7. Call to PeekMessageW twice, both returns 0
8. Therefore the continue instruction restarts the loop, and we go back to 3.

Using WINEDEBUG=ole, we can see some CoWaitForMultipleHandles call terminate,
but I suspect there could be parallel ones to an infinite one..
but what we can also see is an infinite flood of
trace:ole:CoWaitForMultipleHandles waiting for rpc completion or window message

We would need an expert of the ole32 dll to help here..

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