Subj : Re: returning arguments
To   : comp.programming.threads
From : Huub
Date : Wed Jun 29 2005 03:20 pm

Joe Seigh wrote:
> Huub wrote:
> 
>> I *thought* I understood it. Could you explain a bit more of the last
>> part of your comment please, including the casting to a pointer to the
>> structure?
>> Do you mean something like this:
>>
>> void *LeesSensoren(void *threadid)
>> {
>>     ...
>>     displaygegevens = dg;
>>     ...
>>     return (void*)&dg;
>> }
>>
>> void x()
>> {
>>     ...
>>     pthread_join(threads[t], &retp);
>>     (*dg)*retp;
>>     rookstatus = dg.rookstatus;
>>     gasstatus = dg.gasstatus;
>>     temperatuur = dg.temperatuur;
>> }
>>
>> Thank you for helping,
>>
>> Huub
> 
> 
> 
> void *LeesSensoren(void *threadid)
> {
>    struct displaygegevens *dg
>    ...
>    dg = (struct displaygegevens *)malloc(sizeof(struct displaygegevens));
>    ...
>    return (void*)dg;
> }
> 
> void x()
> {
>    struct displaygegevens *dg
> 
>    pthreadcreate(&threads[t],NULL , &LeesSensoren, &threadid[t]);
>    ...
>    pthread_join(threads[t], (void **)&dg);
>    rookstatus = dg->rookstatus;
>    gasstatus = dg->gasstatus;
>    temperatuur = dg->temperatuur;
> 
>    free(dg);
> }
> 
> Something like that.
> 
Thank you. Since my source on threads is offline: do I have to use 
free(..) after pthread_join(..,..);?

.