/* Which thread is running on an LWP?
   Copyright (C) 2003-2015 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */


/* Given an lwpid_t identifying an LWP, return the descriptor of the
   thread running on it and TD_OK, or NULL and a non-TD_OK td_err_e
   code indicating the reason for failure.  Thread descriptors are
   opaque pointers and should not be dereferenced by calling code.
   The caller is responsible for checking that the information we rely
   on is valid, i.e. that __pthread_initialize_minimal has gotten far
   enough.  See comments in infinity_map_lwp2thr.i8 for more.  */

int, addr
libpthread::__lookup_th_unique (int lwpid)
{
  err, result = i8core::ps_get_thread_area (lwpid, I8_TS_CTA_VALUE);
  if (err != PS_OK)
    return TD_ERR, undefined;

  return TD_OK, result;
}