Re: [LAD] snd_seq_port_info and shared_ptr

On Sat, Sep 5, 2009 at 3:38 AM, Christian<krampenschiesser@email-addr-hidden> wrote:
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> As I'm new to smart pointers and memory management in C++ I have a short
> question on this topic.
> I'm now using the following code to traverse the devices and their ports:
>        snd_seq_client_info_t *clientInfo = 0;
>        snd_seq_port_info_t *portInfo = 0;
>        snd_seq_client_info_malloc(&clientInfo);
>        snd_seq_port_info_malloc(&portInfo);
>        shared_ptr<snd_seq_client_info_t> clientInfoMemoryHandler(clientInfo,
> snd_seq_client_info_free);
>        shared_ptr<snd_seq_port_info_t> portInfoMemoryHandler(portInfo,
> snd_seq_port_info_free);
>        .
>        .
>        .
> snd_seq_port_info_set_client( portInfo,
> snd_seq_client_info_get_client(clientInfo ) );
> snd_seq_port_info_set_port( portInfo, -1 );
> while ( snd_seq_query_next_port( seq, portInfo ) >= 0 ) {
>        string portName = snd_seq_port_info_get_name( portInfo );
>        unsigned int capability = snd_seq_port_info_get_capability( portInfo );
>        .
>        .
>        .
> Well the cleanUp methods are called at block-leaving.
> I'm only a bit curious because after giving portInfo and clientInfo to
> the shared_ptr for cleanup management I have to use them for all the
> alsa queries.
> But since I'm not using malloc and free in these queries everything is
> ok, isn't it?

I'm unclear why you are attempting to use C++ shared ptr's with ALSA's
very clearly C-style explicit memory management of various opaque data
objects. What are you attempting to do?
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Received on Sat Sep 5 16:15:03 2009