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POPointer gets lost when allocated struct with pointer on allocated string gets passed as argument for pthread
 

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  1. POPointer gets lost when allocated struct with pointer on allocated string gets passed as argument for pthread
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    <p>I'm writing a server who starts a thread for each incomming request. I want to pass the arugments of the request and some other things to the thread. To do so Iam using a struct, which is allocated and contains a pointer which points onto an allocated string. I do so to keep the struct alive for the thread even when the main-thread enters its next loop. When I pass the pointer to this struct to my thread, the pointer in the struct which should point onto the string, "lost" its information. Well I get a EXC_BAD_ACCESS and I have no Idea why.</p> <p>Any help is welcome :-)</p> <pre><code>typedef struct _thdata { int socket; int thread_no; char *parameter; }thdata; void *thread_function(thdata *data) { printf("Thread %i: got:%s\n", data-&gt;thread_no, data-&gt;parameter);&lt;-EXC_BAD_ACCESS ... free data-&gt;parameter; free data; pthread_exit((void *)0); } int main(...) { ... while(1){ ... thdata *data; data = (thdata*)malloc(sizeof(data)); data-&gt;socket=connSocket; data-&gt;thread_no=i; data-&gt;parameter=(char*)malloc(strlen(param)+1); strcpy(data-&gt;parameter, param); ... pthread_create( &amp;p_thread, NULL, (void *(*)(void *))thread_function, (void*) &amp;data); ... } } </code></pre>
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    1. USSchaltfehler
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