1169695Skan/* Copyright (C) 2005 Free Software Foundation, Inc. 2169695Skan Contributed by Richard Henderson <rth@redhat.com>. 3169695Skan 4169695Skan This file is part of the GNU OpenMP Library (libgomp). 5169695Skan 6169695Skan Libgomp is free software; you can redistribute it and/or modify it 7169695Skan under the terms of the GNU Lesser General Public License as published by 8169695Skan the Free Software Foundation; either version 2.1 of the License, or 9169695Skan (at your option) any later version. 10169695Skan 11169695Skan Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY 12169695Skan WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 13169695Skan FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for 14169695Skan more details. 15169695Skan 16169695Skan You should have received a copy of the GNU Lesser General Public License 17169695Skan along with libgomp; see the file COPYING.LIB. If not, write to the 18169695Skan Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 19169695Skan MA 02110-1301, USA. */ 20169695Skan 21169695Skan/* As a special exception, if you link this library with other files, some 22169695Skan of which are compiled with GCC, to produce an executable, this library 23169695Skan does not by itself cause the resulting executable to be covered by the 24169695Skan GNU General Public License. This exception does not however invalidate 25169695Skan any other reasons why the executable file might be covered by the GNU 26169695Skan General Public License. */ 27169695Skan 28169695Skan/* This file handles the SINGLE construct. */ 29169695Skan 30169695Skan#include "libgomp.h" 31169695Skan 32169695Skan 33169695Skan/* This routine is called when first encountering a SINGLE construct that 34169695Skan doesn't have a COPYPRIVATE clause. Returns true if this is the thread 35169695Skan that should execute the clause. */ 36169695Skan 37169695Skanbool 38169695SkanGOMP_single_start (void) 39169695Skan{ 40169695Skan bool ret = gomp_work_share_start (false); 41169695Skan gomp_mutex_unlock (&gomp_thread ()->ts.work_share->lock); 42169695Skan gomp_work_share_end_nowait (); 43169695Skan return ret; 44169695Skan} 45169695Skan 46169695Skan/* This routine is called when first encountering a SINGLE construct that 47169695Skan does have a COPYPRIVATE clause. Returns NULL if this is the thread 48169695Skan that should execute the clause; otherwise the return value is pointer 49169695Skan given to GOMP_single_copy_end by the thread that did execute the clause. */ 50169695Skan 51169695Skanvoid * 52169695SkanGOMP_single_copy_start (void) 53169695Skan{ 54169695Skan struct gomp_thread *thr = gomp_thread (); 55169695Skan 56169695Skan bool first; 57169695Skan void *ret; 58169695Skan 59169695Skan first = gomp_work_share_start (false); 60169695Skan gomp_mutex_unlock (&thr->ts.work_share->lock); 61169695Skan 62169695Skan if (first) 63169695Skan ret = NULL; 64169695Skan else 65169695Skan { 66169695Skan gomp_barrier_wait (&thr->ts.team->barrier); 67169695Skan 68169695Skan ret = thr->ts.work_share->copyprivate; 69169695Skan gomp_work_share_end_nowait (); 70169695Skan } 71169695Skan 72169695Skan return ret; 73169695Skan} 74169695Skan 75169695Skan/* This routine is called when the thread that entered a SINGLE construct 76169695Skan with a COPYPRIVATE clause gets to the end of the construct. */ 77169695Skan 78169695Skanvoid 79169695SkanGOMP_single_copy_end (void *data) 80169695Skan{ 81169695Skan struct gomp_thread *thr = gomp_thread (); 82169695Skan struct gomp_team *team = thr->ts.team; 83169695Skan 84169695Skan if (team != NULL) 85169695Skan { 86169695Skan thr->ts.work_share->copyprivate = data; 87169695Skan gomp_barrier_wait (&team->barrier); 88169695Skan } 89169695Skan 90169695Skan gomp_work_share_end_nowait (); 91169695Skan} 92