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#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include "thread_internal.h"
#include <pthread.h>
int pthread_join(pthread_t th, void **thread_return)
{
pthread_t j;
_pthread_descr this, thread;
__THREAD_INIT();
this = __thread_self();
j=__find_thread_id(th);
if (j==-1) {
(*(__errno_location()))=ESRCH;
return -1;
}
thread = __get_thread_struct(j);
/* error handling */
if (thread==0) {
(*(__errno_location()))=ESRCH;
return -1;
}
if (this==thread) {
(*(__errno_location()))=EDEADLK;
return -1;
}
if (thread->detached || thread->joined) {
(*(__errno_location()))=EINVAL;
return -1;
}
thread->joined=this;
this->join=1;
while(this->join) __thread_wait_some_time();
if (thread_return) *thread_return=this->retval;
return 0;
}
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