int
__profil (u_short *sample_buffer, size_t size, size_t offset, u_int scale)
{
error_t err;
__spin_lock (&lock);
if (scale == 0)
{
/* Disable profiling. */
int count;
if (profile_thread != MACH_PORT_NULL)
__thread_suspend (profile_thread);
/* Fetch the last set of samples */
if (sample_scale)
fetch_samples ();
err = __task_disable_pc_sampling (__mach_task_self (), &count);
sample_scale = 0;
seqno = 0;
}
else
err = update_waiter (sample_buffer, size, offset, scale);
__spin_unlock (&lock);
return err ? __hurd_fail (err) : 0;
}
error_t
hurd_thread_cancel (thread_t thread)
{
struct hurd_sigstate *ss = _hurd_thread_sigstate (thread);
struct machine_thread_all_state state;
int state_change;
error_t err;
if (! ss)
return EINVAL;
if (ss == _hurd_self_sigstate ())
{
/* We are cancelling ourselves, so it is easy to succeed
quickly. Since this function is not a cancellation point, we
just leave the flag set pending the next cancellation point
(hurd_check_cancel or RPC) and return success. */
ss->cancel = 1;
return 0;
}
assert (! __spin_lock_locked (&ss->critical_section_lock));
__spin_lock (&ss->critical_section_lock);
__spin_lock (&ss->lock);
err = __thread_suspend (thread);
__spin_unlock (&ss->lock);
if (! err)
{
/* Set the flag telling the thread its operation is being cancelled. */
ss->cancel = 1;
/* Interrupt any interruptible RPC now in progress. */
state.set = 0;
_hurdsig_abort_rpcs (ss, 0, 0, &state, &state_change, NULL, 0, 0);
if (state_change)
err = __thread_set_state (thread, MACHINE_THREAD_STATE_FLAVOR,
(natural_t *) &state.basic,
MACHINE_THREAD_STATE_COUNT);
if (ss->cancel_hook)
/* The code being cancelled has a special wakeup function.
Calling this should make the thread wake up and check the
cancellation flag. */
(*ss->cancel_hook) ();
__thread_resume (thread);
}
_hurd_critical_section_unlock (ss);
return err;
}
int pthread_cond_wait(pthread_cond_t*cond,pthread_mutex_t*mutex) {
_pthread_descr this=__thread_self();
_pthread_descr*tmp;
if (mutex->owner!=this) return EINVAL;
__NO_ASYNC_CANCEL_BEGIN_(this);
/* put in wait-chain */
LOCK(cond);
tmp=&(cond->wait_chain);
this->waitnext=0;
while (*tmp) tmp=&((*tmp)->waitnext);
this->waitprev=tmp;
*tmp=this;
UNLOCK(cond);
/* Aeh yeah / wait till condition-signal (or cancel) */
pthread_mutex_unlock(mutex);
__thread_suspend(this,1);
pthread_mutex_lock(mutex);
/* remove from wait-chain (if not signaled) */
LOCK(cond);
if (this->waitnext) {
this->waitnext->waitprev=this->waitprev;
*(this->waitprev)=this->waitnext;
}
else *(this->waitprev)=0;
UNLOCK(cond);
__NO_ASYNC_CANCEL_END_(this);
return 0;
}