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int p thread_create ( pthread_t *tid, const pthread_attr_t *tattr, void *(*start_routine)(void*), void *arg );
#include<pthread.h>
pthread_attr_t  tattr;
pthread_t  tid;
extern  void  *start_routine(void *arg);
void  *arg;
int  ret;
/*default behavior*/
ret = pthread_create( &tid, NULL, start_routine, arg );
/*init with default attributes*/
ret = pthread_attr_init( &tattr );
/*default behavior specified*/
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       int pthread_join( pthread_t tid, void **status );
       #include<pthread.h>
       pthread_t  tid;
       int  ret;
       int  status;
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