asterisk users - Aug 2003 - ast_channel_alloc() losing pvt struct

I don't understand the reasoning here so could somebody please help me out?

chan_h323 is causing a segmentation fault when trying to connect a call.
I tracked the problem back to chan_h323.c in the oh323_new() function.

the code is: tmp = ast_channel_alloc( 1 );

After this point, tmp->pvt is not allocated (null pointer).
HOWEVER, in the ast_channel_alloc() function right before the statement: return
tmp; tmp->pvt IS allocated.

Now between the statements: return tmp; and tmp = ... the pvt structure is
getting lost and the tmp->pvt point is set to 0.
Has anyone got a clue here?  It doesn't make any sense to me at all.

John.
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Well the code that actually blows up is the rawwriteformat assignment, 
but yes the channel pvt struct somehow is getting destroyed or corrupted 
somehow


Jeremy McNamara




John Fortman wrote:
> I don't understand the reasoning here so could somebody please help me 
> out?
>  
> chan_h323 is causing a segmentation fault when trying to connect a call.
> I tracked the problem back to chan_h323.c in the oh323_new() function.
>  
> the code is: tmp = ast_channel_alloc( 1 );
>  
> After this point, tmp->pvt is not allocated (null pointer).
> HOWEVER, in the ast_channel_alloc() function right before the 
> statement: return tmp; tmp->pvt IS allocated.
>  
> Now between the statements: return tmp; and tmp = ... the pvt 
> structure is getting lost and the tmp->pvt point is set to 0.
> Has anyone got a clue here?  It doesn't make any sense to me at all.
>  
> John.