int
_pthread_detach(pthread_t pthread)
{
struct pthread *curthread = _get_curthread();
int rval;
if (pthread == NULL)
return (EINVAL);
if ((rval = _thr_find_thread(curthread, pthread,
/*include dead*/1)) != 0) {
return (rval);
}
/* Check if the thread is already detached or has a joiner. */
if ((pthread->flags & THR_FLAGS_DETACHED) != 0 ||
(pthread->joiner != NULL)) {
THR_THREAD_UNLOCK(curthread, pthread);
return (EINVAL);
}
/* Flag the thread as detached. */
pthread->flags |= THR_FLAGS_DETACHED;
_thr_try_gc(curthread, pthread); /* thread lock released */
return (0);
}
int
_pthread_setprio(pthread_t pthread, int prio)
{
struct pthread *curthread = _get_curthread();
struct sched_param param;
int ret;
param.sched_priority = prio;
if (pthread == curthread)
THR_LOCK(curthread);
else if ((ret = _thr_find_thread(curthread, pthread, /*include dead*/0)))
return (ret);
if (pthread->attr.sched_policy == SCHED_OTHER ||
pthread->attr.prio == prio) {
pthread->attr.prio = prio;
ret = 0;
} else {
ret = _thr_setscheduler(pthread->tid,
pthread->attr.sched_policy, ¶m);
if (ret == -1)
ret = errno;
else
pthread->attr.prio = prio;
}
THR_THREAD_UNLOCK(curthread, pthread);
return (ret);
}
int
_pthread_detach(pthread_t pthread)
{
struct pthread *curthread = tls_get_curthread();
int rval;
if (pthread == NULL)
return (EINVAL);
THREAD_LIST_LOCK(curthread);
if ((rval = _thr_find_thread(curthread, pthread,
/*include dead*/1)) != 0) {
THREAD_LIST_UNLOCK(curthread);
return (rval);
}
/* Check if the thread is already detached or has a joiner. */
if ((pthread->tlflags & TLFLAGS_DETACHED) != 0 ||
(pthread->joiner != NULL)) {
THREAD_LIST_UNLOCK(curthread);
return (EINVAL);
}
/* Flag the thread as detached. */
pthread->tlflags |= TLFLAGS_DETACHED;
if (pthread->state == PS_DEAD)
THR_GCLIST_ADD(pthread);
THREAD_LIST_UNLOCK(curthread);
return (0);
}
/*
* Set a thread's scheduling parameters, this should be done
* in kernel, doing it in userland is no-op.
*/
int
_pthread_setschedparam(pthread_t pthread, int policy,
const struct sched_param *param)
{
struct pthread *curthread = _get_curthread();
int ret;
if (pthread == curthread)
THR_LOCK(curthread);
else if ((ret = _thr_find_thread(curthread, pthread,
/*include dead*/0)) != 0)
return (ret);
if (pthread->attr.sched_policy == policy &&
(policy == SCHED_OTHER ||
pthread->attr.prio == param->sched_priority)) {
pthread->attr.prio = param->sched_priority;
THR_THREAD_UNLOCK(curthread, pthread);
return (0);
}
ret = _thr_setscheduler(pthread->tid, policy, param);
if (ret == -1)
ret = errno;
else {
pthread->attr.sched_policy = policy;
pthread->attr.prio = param->sched_priority;
}
THR_THREAD_UNLOCK(curthread, pthread);
return (ret);
}
int
_pthread_kill(pthread_t pthread, int sig)
{
struct pthread *curthread;
int ret;
/* Check for invalid signal numbers: */
if (sig < 0 || sig > _SIG_MAXSIG)
/* Invalid signal: */
return (EINVAL);
curthread = _get_curthread();
/*
* Ensure the thread is in the list of active threads, and the
* signal is valid (signal 0 specifies error checking only) and
* not being ignored:
*/
if (curthread == pthread) {
if (sig > 0)
_thr_send_sig(pthread, sig);
ret = 0;
} else if ((ret = _thr_find_thread(curthread, pthread,
/*include dead*/0)) == 0) {
if (sig > 0)
_thr_send_sig(pthread, sig);
THR_THREAD_UNLOCK(curthread, pthread);
}
/* Return the completion status: */
return (ret);
}
int
_pthread_cancel(pthread_t pthread)
{
struct pthread *curthread = _get_curthread();
int ret;
/*
* POSIX says _pthread_cancel should be async cancellation safe.
* _thr_find_thread and THR_THREAD_UNLOCK will enter and leave critical
* region automatically.
*/
if ((ret = _thr_find_thread(curthread, pthread, 0)) == 0) {
if (!pthread->cancel_pending) {
pthread->cancel_pending = 1;
if (pthread->state != PS_DEAD)
_thr_send_sig(pthread, SIGCANCEL);
}
THR_THREAD_UNLOCK(curthread, pthread);
}
return (ret);
}
int
_pthread_getaffinity_np(pthread_t td, size_t cpusetsize, cpuset_t *cpusetp)
{
struct pthread *curthread = _get_curthread();
lwpid_t tid;
int error;
if (td == curthread) {
error = cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_TID,
-1, cpusetsize, cpusetp);
if (error == -1)
error = errno;
} else if ((error = _thr_find_thread(curthread, td, 0)) == 0) {
tid = TID(td);
error = cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_TID, tid,
cpusetsize, cpusetp);
if (error == -1)
error = errno;
THR_THREAD_UNLOCK(curthread, td);
}
return (error);
}
int
_pthread_getschedparam(pthread_t pthread, int *policy,
struct sched_param *param)
{
struct pthread *curthread = _get_curthread();
int ret = 0;
if (policy == NULL || param == NULL)
return (EINVAL);
/*
* Avoid searching the thread list when it is the current
* thread.
*/
if (pthread == curthread)
THR_LOCK(curthread);
else if ((ret = _thr_find_thread(curthread, pthread, /*include dead*/0)))
return (ret);
*policy = pthread->attr.sched_policy;
param->sched_priority = pthread->attr.prio;
THR_THREAD_UNLOCK(curthread, pthread);
return (ret);
}
/* Set the thread name for debug. */
void
_pthread_set_name_np(pthread_t thread, const char *name)
{
struct pthread *curthread = _get_curthread();
int ret = 0;
if (curthread == thread) {
if (thr_set_name(thread->tid, name))
ret = errno;
} else {
if ((ret=_thr_find_thread(curthread, thread, 0)) == 0) {
if (thread->state != PS_DEAD) {
if (thr_set_name(thread->tid, name))
ret = errno;
}
THR_THREAD_UNLOCK(curthread, thread);
}
}
#if 0
/* XXX should return error code. */
return (ret);
#endif
}
static int
join_common(pthread_t pthread, void **thread_return,
const struct timespec *abstime)
{
struct pthread *curthread = tls_get_curthread();
struct timespec ts, ts2, *tsp;
void *tmp;
long state;
int oldcancel;
int ret = 0;
if (pthread == NULL)
return (EINVAL);
if (pthread == curthread)
return (EDEADLK);
THREAD_LIST_LOCK(curthread);
if ((ret = _thr_find_thread(curthread, pthread, 1)) != 0) {
ret = ESRCH;
} else if ((pthread->tlflags & TLFLAGS_DETACHED) != 0) {
ret = ESRCH;
} else if (pthread->joiner != NULL) {
/* Multiple joiners are not supported. */
ret = ENOTSUP;
}
if (ret) {
THREAD_LIST_UNLOCK(curthread);
return (ret);
}
/* Set the running thread to be the joiner: */
pthread->joiner = curthread;
THREAD_LIST_UNLOCK(curthread);
THR_CLEANUP_PUSH(curthread, backout_join, pthread);
oldcancel = _thr_cancel_enter(curthread);
while ((state = pthread->state) != PS_DEAD) {
if (abstime != NULL) {
clock_gettime(CLOCK_REALTIME, &ts);
TIMESPEC_SUB(&ts2, abstime, &ts);
if (ts2.tv_sec < 0) {
ret = ETIMEDOUT;
break;
}
tsp = &ts2;
} else
tsp = NULL;
ret = _thr_umtx_wait(&pthread->state, state, tsp,
CLOCK_REALTIME);
if (ret == ETIMEDOUT)
break;
}
_thr_cancel_leave(curthread, oldcancel);
THR_CLEANUP_POP(curthread, 0);
if (ret == ETIMEDOUT) {
THREAD_LIST_LOCK(curthread);
pthread->joiner = NULL;
THREAD_LIST_UNLOCK(curthread);
} else {
ret = 0;
tmp = pthread->ret;
THREAD_LIST_LOCK(curthread);
pthread->tlflags |= TLFLAGS_DETACHED;
pthread->joiner = NULL;
THR_GCLIST_ADD(pthread);
THREAD_LIST_UNLOCK(curthread);
if (thread_return != NULL)
*thread_return = tmp;
}
return (ret);
}
/*
* Cancellation behavior:
* if the thread is canceled, joinee is not recycled.
*/
static int
join_common(pthread_t pthread, void **thread_return,
const struct timespec *abstime)
{
struct pthread *curthread = _get_curthread();
struct timespec ts, ts2, *tsp;
void *tmp;
long tid;
int ret = 0;
if (pthread == NULL)
return (EINVAL);
if (pthread == curthread)
return (EDEADLK);
if ((ret = _thr_find_thread(curthread, pthread, 1)) != 0)
return (ESRCH);
if ((pthread->flags & THR_FLAGS_DETACHED) != 0) {
ret = EINVAL;
} else if (pthread->joiner != NULL) {
/* Multiple joiners are not supported. */
ret = ENOTSUP;
}
if (ret) {
THR_THREAD_UNLOCK(curthread, pthread);
return (ret);
}
/* Set the running thread to be the joiner: */
pthread->joiner = curthread;
THR_THREAD_UNLOCK(curthread, pthread);
THR_CLEANUP_PUSH(curthread, backout_join, pthread);
_thr_cancel_enter(curthread);
tid = pthread->tid;
while (pthread->tid != TID_TERMINATED) {
_thr_testcancel(curthread);
if (abstime != NULL) {
clock_gettime(CLOCK_REALTIME, &ts);
TIMESPEC_SUB(&ts2, abstime, &ts);
if (ts2.tv_sec < 0) {
ret = ETIMEDOUT;
break;
}
tsp = &ts2;
} else
tsp = NULL;
ret = _thr_umtx_wait(&pthread->tid, tid, tsp);
if (ret == ETIMEDOUT)
break;
}
_thr_cancel_leave(curthread, 0);
THR_CLEANUP_POP(curthread, 0);
if (ret == ETIMEDOUT) {
THR_THREAD_LOCK(curthread, pthread);
pthread->joiner = NULL;
THR_THREAD_UNLOCK(curthread, pthread);
} else {
ret = 0;
tmp = pthread->ret;
THR_THREAD_LOCK(curthread, pthread);
pthread->flags |= THR_FLAGS_DETACHED;
pthread->joiner = NULL;
_thr_try_gc(curthread, pthread); /* thread lock released */
if (thread_return != NULL)
*thread_return = tmp;
}
return (ret);
}
