Re: [LAD] snd_seq_port_info and shared_ptr

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Paul Davis schrieb:
> 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?
>
>

Well I actually want a c++ wrapper and these are my first alsa-steps.
Used RtMidi in the past but want to have access to the suscription api.
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Received on Sat Sep 5 16:15:03 2009