URL
https://opencores.org/ocsvn/openrisc/openrisc/trunk
Subversion Repositories openrisc
[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgomp/] [sections.c] - Rev 765
Go to most recent revision | Compare with Previous | Blame | View Log
/* Copyright (C) 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. Contributed by Richard Henderson <rth@redhat.com>. This file is part of the GNU OpenMP Library (libgomp). Libgomp is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. Libgomp 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 General Public License for more details. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ /* This file handles the SECTIONS construct. */ #include "libgomp.h" /* Initialize the given work share construct from the given arguments. */ static inline void gomp_sections_init (struct gomp_work_share *ws, unsigned count) { ws->sched = GFS_DYNAMIC; ws->chunk_size = 1; ws->end = count + 1L; ws->incr = 1; ws->next = 1; #ifdef HAVE_SYNC_BUILTINS /* Prepare things to make each iteration faster. */ if (sizeof (long) > sizeof (unsigned)) ws->mode = 1; else { struct gomp_thread *thr = gomp_thread (); struct gomp_team *team = thr->ts.team; long nthreads = team ? team->nthreads : 1; ws->mode = ((nthreads | ws->end) < 1UL << (sizeof (long) * __CHAR_BIT__ / 2 - 1)); } #else ws->mode = 0; #endif } /* This routine is called when first encountering a sections construct that is not bound directly to a parallel construct. The first thread that arrives will create the work-share construct; subsequent threads will see the construct exists and allocate work from it. COUNT is the number of sections in this construct. Returns the 1-based section number for this thread to perform, or 0 if all work was assigned to other threads prior to this thread's arrival. */ unsigned GOMP_sections_start (unsigned count) { struct gomp_thread *thr = gomp_thread (); long s, e, ret; if (gomp_work_share_start (false)) { gomp_sections_init (thr->ts.work_share, count); gomp_work_share_init_done (); } #ifdef HAVE_SYNC_BUILTINS if (gomp_iter_dynamic_next (&s, &e)) ret = s; else ret = 0; #else gomp_mutex_lock (&thr->ts.work_share->lock); if (gomp_iter_dynamic_next_locked (&s, &e)) ret = s; else ret = 0; gomp_mutex_unlock (&thr->ts.work_share->lock); #endif return ret; } /* This routine is called when the thread completes processing of the section currently assigned to it. If the work-share construct is bound directly to a parallel construct, then the construct may have been set up before the parallel. In which case, this may be the first iteration for the thread. Returns the 1-based section number for this thread to perform, or 0 if all work was assigned to other threads prior to this thread's arrival. */ unsigned GOMP_sections_next (void) { long s, e, ret; #ifdef HAVE_SYNC_BUILTINS if (gomp_iter_dynamic_next (&s, &e)) ret = s; else ret = 0; #else struct gomp_thread *thr = gomp_thread (); gomp_mutex_lock (&thr->ts.work_share->lock); if (gomp_iter_dynamic_next_locked (&s, &e)) ret = s; else ret = 0; gomp_mutex_unlock (&thr->ts.work_share->lock); #endif return ret; } /* This routine pre-initializes a work-share construct to avoid one synchronization once we get into the loop. */ void GOMP_parallel_sections_start (void (*fn) (void *), void *data, unsigned num_threads, unsigned count) { struct gomp_team *team; num_threads = gomp_resolve_num_threads (num_threads, count); team = gomp_new_team (num_threads); gomp_sections_init (&team->work_shares[0], count); gomp_team_start (fn, data, num_threads, team); } /* The GOMP_section_end* routines are called after the thread is told that all sections are complete. This first version synchronizes all threads; the nowait version does not. */ void GOMP_sections_end (void) { gomp_work_share_end (); } void GOMP_sections_end_nowait (void) { gomp_work_share_end_nowait (); }
Go to most recent revision | Compare with Previous | Blame | View Log