lifetime of the MIDI/MIXER/WAVEOPENDESC structure?

Hi,

MSDN is silent about the lifetime of the MIDI/MIXER/WAVEOPENDESC structure
that is deliverred via the W/MODM_OPEN/MXM_OPEN message to the winmm drivers
(WAVEOOPENDESC is not even documented for MS-Windows (not CE) anymore).

http://msdn.microsoft.com/en-us/library/ff537518%28v=vs.85%29.aspx MIDIOPENDESC

IMHO, it would make a lot of sense if the structure remained allocated
for the whole lifetime of the open/close cycle, so the driver need not make a copy of it.

Is there anybody who knows more about this topic?

Thank you,
 Jörg Höhle

[Maarten Lankhorst]

Hey,

Op 16-03-11 16:03, Joerg-Cyril.Hoehle(a)t-systems.com schreef:
> Hi,
>
> MSDN is silent about the lifetime of the MIDI/MIXER/WAVEOPENDESC structure
> that is deliverred via the W/MODM_OPEN/MXM_OPEN message to the winmm drivers
> (WAVEOOPENDESC is not even documented for MS-Windows (not CE) anymore).
>
> http://msdn.microsoft.com/en-us/library/ff537518%28v=vs.85%29.aspx MIDIOPENDESC
>
> IMHO, it would make a lot of sense if the structure remained allocated
> for the whole lifetime of the open/close cycle, so the driver need not make a copy of it.
>
> Is there anybody who knows more about this topic?
> I wouldn't count on it, the structure is allocated on the stack, see for 
> example winmm.c: WAVE_Open

Cheers,
Maarten