ref: ba4b0723d9e6d6ec72ca54016a932e72fbae46f7
dir: /libnpe_pthread/pthread_join.c/
#include "_pthread.h"
int
pthread_join(pthread_t pt, void **res)
{
npe_pthread_t *t;
t = (npe_pthread_t*)pt;
if(t->waitchan != nil)
recv(t->waitchan, res);
return 0;
}