int
dcethread_create(dcethread** _thread, dcethread_attr* attr, void *(*start_routine)(void *), void *arg)
{
dcethread_start_args *start_args;
dcethread* thread;
int detachstate;
start_args = (dcethread_start_args *) malloc(sizeof(*start_args));
if (start_args == NULL)
{
return dcethread__set_errno(ENOMEM);
}
start_args->start = start_routine;
start_args->data = arg;
start_args->self = thread = dcethread__new();
/* Record if this thread was created joinably */
if (!attr || (pthread_attr_getdetachstate(attr, &detachstate), detachstate == PTHREAD_CREATE_JOINABLE))
{
thread->flag.joinable = 1;
}
/* If thread is joinable, give it an extra reference */
if (thread->flag.joinable)
{
thread->refs++;
}
if (dcethread__set_errno(pthread_create((pthread_t*) &thread->pthread, attr, proxy_start, start_args)))
{
dcethread__delete(thread);
free(start_args);
return -1;
}
DCETHREAD_TRACE("Thread %p: created (pthread %lu)", thread, (unsigned long) thread->pthread);
dcethread__lock(thread);
while (thread->state == DCETHREAD_STATE_CREATED)
{
dcethread__wait(thread);
}
dcethread__unlock(thread);
DCETHREAD_TRACE("Thread %p: started", thread);
*_thread = thread;
return dcethread__set_errno(0);
}
void
dcethread__unlock(dcethread* thread)
{
unsigned int refs;
dcethread__sanity(thread);
/* Access reference count while thread is still locked
in order to avoid race conditions */
refs = thread->refs;
thread->flag.locked = 0;
if (pthread_mutex_unlock((pthread_mutex_t*) &thread->lock))
DCETHREAD_ERROR("Thread %p: failed to unlock mutex", thread);
DCETHREAD_TRACE("Thread %p: unlocked", thread);
if (refs == 0)
{
dcethread__delete(thread);
}
}