[gomp] Add RTEMS configuration
libgomp/ChangeLog * config/rtems/bar.c: New. * config/rtems/bar.h: Likewise. * config/rtems/mutex.c: Likewise. * config/rtems/mutex.h: Likewise. * config/rtems/sem.c: Likewise. * config/rtems/sem.h: Likewise. * configure.ac (*-*-rtems*): Check that Newlib provides a proper <sys/lock.h> header file. * configure.tgt (*-*-rtems*): Enable RTEMS configuration if supported by Newlib. * configure: Regenerate. From-SVN: r227440
This commit is contained in:
Sebastian Huber
Sebastian Huber
parent
7892ec670c
commit
13c41b2e3e
10 changed files with 583 additions and 0 deletions
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@ -1,3 +1,17 @@
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2015-09-03 Sebastian Huber <sebastian.huber@embedded-brains.de>
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* config/rtems/bar.c: New.
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* config/rtems/bar.h: Likewise.
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* config/rtems/mutex.c: Likewise.
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* config/rtems/mutex.h: Likewise.
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* config/rtems/sem.c: Likewise.
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* config/rtems/sem.h: Likewise.
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* configure.ac (*-*-rtems*): Check that Newlib provides a proper
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<sys/lock.h> header file.
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* configure.tgt (*-*-rtems*): Enable RTEMS configuration if
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supported by Newlib.
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* configure: Regenerate.
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2015-09-03 Sebastian Huber <sebastian.huber@embedded-brains.de>
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* team.c (gomp_new_thread_pool): Delete and move content to ...
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255
libgomp/config/rtems/bar.c
Normal file
255
libgomp/config/rtems/bar.c
Normal file
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@ -0,0 +1,255 @@
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/* Copyright (C) 2005-2015 Free Software Foundation, Inc.
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Contributed by Sebastian Huber <sebastian.huber@embedded-brains.de>.
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This file is part of the GNU OpenMP Library (libgomp).
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Libgomp is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/* This is the RTEMS implementation of a barrier synchronization
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mechanism for libgomp. It is identical to the Linux implementation, except
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that the futex API is slightly different. This type is private to the
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library. */
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#include "libgomp.h"
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#include "bar.h"
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#include <limits.h>
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static gomp_barrier_t *
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generation_to_barrier (int *addr)
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{
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return (gomp_barrier_t *)
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((char *) addr - __builtin_offsetof (gomp_barrier_t, generation));
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}
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static void
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futex_wait (int *addr, int val)
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{
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gomp_barrier_t *bar = generation_to_barrier (addr);
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_Futex_Wait (&bar->futex, addr, val);
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}
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static void
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futex_wake (int *addr, int count)
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{
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gomp_barrier_t *bar = generation_to_barrier (addr);
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_Futex_Wake (&bar->futex, count);
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}
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static int
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do_spin (int *addr, int val)
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{
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unsigned long long i, count = gomp_spin_count_var;
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if (__builtin_expect (gomp_managed_threads > gomp_available_cpus, 0))
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count = gomp_throttled_spin_count_var;
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for (i = 0; i < count; i++)
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if (__builtin_expect (__atomic_load_n (addr, MEMMODEL_RELAXED) != val, 0))
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return 0;
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return 1;
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}
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static void
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do_wait (int *addr, int val)
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{
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if (do_spin (addr, val))
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futex_wait (addr, val);
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}
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/* Everything below this point should be identical to the Linux
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implementation. */
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void
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gomp_barrier_wait_end (gomp_barrier_t *bar, gomp_barrier_state_t state)
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{
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if (__builtin_expect (state & BAR_WAS_LAST, 0))
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{
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/* Next time we'll be awaiting TOTAL threads again. */
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bar->awaited = bar->total;
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__atomic_store_n (&bar->generation, bar->generation + BAR_INCR,
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MEMMODEL_RELEASE);
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futex_wake ((int *) &bar->generation, INT_MAX);
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}
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else
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{
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do
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do_wait ((int *) &bar->generation, state);
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while (__atomic_load_n (&bar->generation, MEMMODEL_ACQUIRE) == state);
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}
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}
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void
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gomp_barrier_wait (gomp_barrier_t *bar)
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{
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gomp_barrier_wait_end (bar, gomp_barrier_wait_start (bar));
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}
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/* Like gomp_barrier_wait, except that if the encountering thread
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is not the last one to hit the barrier, it returns immediately.
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The intended usage is that a thread which intends to gomp_barrier_destroy
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this barrier calls gomp_barrier_wait, while all other threads
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call gomp_barrier_wait_last. When gomp_barrier_wait returns,
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the barrier can be safely destroyed. */
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void
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gomp_barrier_wait_last (gomp_barrier_t *bar)
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{
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gomp_barrier_state_t state = gomp_barrier_wait_start (bar);
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if (state & BAR_WAS_LAST)
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gomp_barrier_wait_end (bar, state);
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}
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void
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gomp_team_barrier_wake (gomp_barrier_t *bar, int count)
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{
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futex_wake ((int *) &bar->generation, count == 0 ? INT_MAX : count);
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}
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void
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gomp_team_barrier_wait_end (gomp_barrier_t *bar, gomp_barrier_state_t state)
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{
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unsigned int generation, gen;
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if (__builtin_expect (state & BAR_WAS_LAST, 0))
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{
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/* Next time we'll be awaiting TOTAL threads again. */
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struct gomp_thread *thr = gomp_thread ();
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struct gomp_team *team = thr->ts.team;
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bar->awaited = bar->total;
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team->work_share_cancelled = 0;
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if (__builtin_expect (team->task_count, 0))
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{
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gomp_barrier_handle_tasks (state);
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state &= ~BAR_WAS_LAST;
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}
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else
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{
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state &= ~BAR_CANCELLED;
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state += BAR_INCR - BAR_WAS_LAST;
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__atomic_store_n (&bar->generation, state, MEMMODEL_RELEASE);
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futex_wake ((int *) &bar->generation, INT_MAX);
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return;
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}
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}
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generation = state;
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state &= ~BAR_CANCELLED;
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do
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{
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do_wait ((int *) &bar->generation, generation);
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gen = __atomic_load_n (&bar->generation, MEMMODEL_ACQUIRE);
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if (__builtin_expect (gen & BAR_TASK_PENDING, 0))
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{
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gomp_barrier_handle_tasks (state);
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gen = __atomic_load_n (&bar->generation, MEMMODEL_ACQUIRE);
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}
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generation |= gen & BAR_WAITING_FOR_TASK;
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}
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while (gen != state + BAR_INCR);
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}
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void
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gomp_team_barrier_wait (gomp_barrier_t *bar)
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{
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gomp_team_barrier_wait_end (bar, gomp_barrier_wait_start (bar));
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}
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void
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gomp_team_barrier_wait_final (gomp_barrier_t *bar)
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{
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gomp_barrier_state_t state = gomp_barrier_wait_final_start (bar);
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if (__builtin_expect (state & BAR_WAS_LAST, 0))
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bar->awaited_final = bar->total;
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gomp_team_barrier_wait_end (bar, state);
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}
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bool
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gomp_team_barrier_wait_cancel_end (gomp_barrier_t *bar,
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gomp_barrier_state_t state)
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{
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unsigned int generation, gen;
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if (__builtin_expect (state & BAR_WAS_LAST, 0))
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{
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/* Next time we'll be awaiting TOTAL threads again. */
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/* BAR_CANCELLED should never be set in state here, because
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cancellation means that at least one of the threads has been
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cancelled, thus on a cancellable barrier we should never see
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all threads to arrive. */
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struct gomp_thread *thr = gomp_thread ();
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struct gomp_team *team = thr->ts.team;
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bar->awaited = bar->total;
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team->work_share_cancelled = 0;
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if (__builtin_expect (team->task_count, 0))
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{
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gomp_barrier_handle_tasks (state);
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state &= ~BAR_WAS_LAST;
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}
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else
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{
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state += BAR_INCR - BAR_WAS_LAST;
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__atomic_store_n (&bar->generation, state, MEMMODEL_RELEASE);
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futex_wake ((int *) &bar->generation, INT_MAX);
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return false;
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}
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}
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if (__builtin_expect (state & BAR_CANCELLED, 0))
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return true;
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generation = state;
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do
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{
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do_wait ((int *) &bar->generation, generation);
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gen = __atomic_load_n (&bar->generation, MEMMODEL_ACQUIRE);
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if (__builtin_expect (gen & BAR_CANCELLED, 0))
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return true;
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if (__builtin_expect (gen & BAR_TASK_PENDING, 0))
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{
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gomp_barrier_handle_tasks (state);
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gen = __atomic_load_n (&bar->generation, MEMMODEL_ACQUIRE);
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}
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generation |= gen & BAR_WAITING_FOR_TASK;
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}
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while (gen != state + BAR_INCR);
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return false;
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}
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bool
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gomp_team_barrier_wait_cancel (gomp_barrier_t *bar)
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{
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return gomp_team_barrier_wait_cancel_end (bar, gomp_barrier_wait_start (bar));
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}
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void
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gomp_team_barrier_cancel (struct gomp_team *team)
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{
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gomp_mutex_lock (&team->task_lock);
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if (team->barrier.generation & BAR_CANCELLED)
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{
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gomp_mutex_unlock (&team->task_lock);
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return;
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}
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team->barrier.generation |= BAR_CANCELLED;
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gomp_mutex_unlock (&team->task_lock);
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futex_wake ((int *) &team->barrier.generation, INT_MAX);
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}
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170
libgomp/config/rtems/bar.h
Normal file
170
libgomp/config/rtems/bar.h
Normal file
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@ -0,0 +1,170 @@
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/* Copyright (C) 2005-2015 Free Software Foundation, Inc.
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Contributed by Sebastian Huber <sebastian.huber@embedded-brains.de>.
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This file is part of the GNU OpenMP Library (libgomp).
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Libgomp is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/* This is the RTEMS implementation of a barrier synchronization
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mechanism for libgomp. It is identical to the Linux implementation, except
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that the futex API is slightly different. This type is private to the
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library. */
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#ifndef GOMP_BARRIER_H
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#define GOMP_BARRIER_H 1
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#include <sys/lock.h>
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typedef struct
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{
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/* Make sure total/generation is in a mostly read cacheline, while
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awaited in a separate cacheline. */
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unsigned total __attribute__((aligned (64)));
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unsigned generation;
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struct _Futex_Control futex;
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unsigned awaited __attribute__((aligned (64)));
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unsigned awaited_final;
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} gomp_barrier_t;
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typedef unsigned int gomp_barrier_state_t;
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/* The generation field contains a counter in the high bits, with a few
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low bits dedicated to flags. Note that TASK_PENDING and WAS_LAST can
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share space because WAS_LAST is never stored back to generation. */
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#define BAR_TASK_PENDING 1
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#define BAR_WAS_LAST 1
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#define BAR_WAITING_FOR_TASK 2
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#define BAR_CANCELLED 4
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#define BAR_INCR 8
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static inline void gomp_barrier_init (gomp_barrier_t *bar, unsigned count)
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{
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bar->total = count;
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bar->awaited = count;
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bar->awaited_final = count;
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bar->generation = 0;
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_Futex_Initialize (&bar->futex);
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}
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static inline void gomp_barrier_reinit (gomp_barrier_t *bar, unsigned count)
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{
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__atomic_add_fetch (&bar->awaited, count - bar->total, MEMMODEL_ACQ_REL);
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bar->total = count;
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}
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static inline void gomp_barrier_destroy (gomp_barrier_t *bar)
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{
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}
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extern void gomp_barrier_wait (gomp_barrier_t *);
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extern void gomp_barrier_wait_last (gomp_barrier_t *);
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extern void gomp_barrier_wait_end (gomp_barrier_t *, gomp_barrier_state_t);
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extern void gomp_team_barrier_wait (gomp_barrier_t *);
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extern void gomp_team_barrier_wait_final (gomp_barrier_t *);
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extern void gomp_team_barrier_wait_end (gomp_barrier_t *,
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gomp_barrier_state_t);
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extern bool gomp_team_barrier_wait_cancel (gomp_barrier_t *);
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extern bool gomp_team_barrier_wait_cancel_end (gomp_barrier_t *,
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gomp_barrier_state_t);
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extern void gomp_team_barrier_wake (gomp_barrier_t *, int);
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struct gomp_team;
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extern void gomp_team_barrier_cancel (struct gomp_team *);
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static inline gomp_barrier_state_t
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gomp_barrier_wait_start (gomp_barrier_t *bar)
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{
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unsigned int ret = __atomic_load_n (&bar->generation, MEMMODEL_ACQUIRE);
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ret &= -BAR_INCR | BAR_CANCELLED;
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/* A memory barrier is needed before exiting from the various forms
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of gomp_barrier_wait, to satisfy OpenMP API version 3.1 section
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2.8.6 flush Construct, which says there is an implicit flush during
|
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a barrier region. This is a convenient place to add the barrier,
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so we use MEMMODEL_ACQ_REL here rather than MEMMODEL_ACQUIRE. */
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if (__atomic_add_fetch (&bar->awaited, -1, MEMMODEL_ACQ_REL) == 0)
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ret |= BAR_WAS_LAST;
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return ret;
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}
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static inline gomp_barrier_state_t
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gomp_barrier_wait_cancel_start (gomp_barrier_t *bar)
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{
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return gomp_barrier_wait_start (bar);
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}
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/* This is like gomp_barrier_wait_start, except it decrements
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bar->awaited_final rather than bar->awaited and should be used
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for the gomp_team_end barrier only. */
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static inline gomp_barrier_state_t
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gomp_barrier_wait_final_start (gomp_barrier_t *bar)
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{
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unsigned int ret = __atomic_load_n (&bar->generation, MEMMODEL_ACQUIRE);
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ret &= -BAR_INCR | BAR_CANCELLED;
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/* See above gomp_barrier_wait_start comment. */
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if (__atomic_add_fetch (&bar->awaited_final, -1, MEMMODEL_ACQ_REL) == 0)
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ret |= BAR_WAS_LAST;
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return ret;
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}
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static inline bool
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gomp_barrier_last_thread (gomp_barrier_state_t state)
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{
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return state & BAR_WAS_LAST;
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}
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/* All the inlines below must be called with team->task_lock
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held. */
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static inline void
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gomp_team_barrier_set_task_pending (gomp_barrier_t *bar)
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{
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bar->generation |= BAR_TASK_PENDING;
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}
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static inline void
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gomp_team_barrier_clear_task_pending (gomp_barrier_t *bar)
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{
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bar->generation &= ~BAR_TASK_PENDING;
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}
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static inline void
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||||
gomp_team_barrier_set_waiting_for_tasks (gomp_barrier_t *bar)
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||||
{
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bar->generation |= BAR_WAITING_FOR_TASK;
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||||
}
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||||
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static inline bool
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gomp_team_barrier_waiting_for_tasks (gomp_barrier_t *bar)
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{
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||||
return (bar->generation & BAR_WAITING_FOR_TASK) != 0;
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}
|
||||
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static inline bool
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gomp_team_barrier_cancelled (gomp_barrier_t *bar)
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||||
{
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return __builtin_expect ((bar->generation & BAR_CANCELLED) != 0, 0);
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||||
}
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static inline void
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gomp_team_barrier_done (gomp_barrier_t *bar, gomp_barrier_state_t state)
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{
|
||||
bar->generation = (state & -BAR_INCR) + BAR_INCR;
|
||||
}
|
||||
|
||||
#endif /* GOMP_BARRIER_H */
|
||||
1
libgomp/config/rtems/mutex.c
Normal file
1
libgomp/config/rtems/mutex.c
Normal file
|
|
@ -0,0 +1 @@
|
|||
/* Everything is in the header. */
|
||||
57
libgomp/config/rtems/mutex.h
Normal file
57
libgomp/config/rtems/mutex.h
Normal file
|
|
@ -0,0 +1,57 @@
|
|||
/* Copyright (C) 2015 Free Software Foundation, Inc.
|
||||
Contributed by Sebastian Huber <sebastian.huber@embedded-brains.de>.
|
||||
|
||||
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 is the RTEMS implementation of a mutex synchronization
|
||||
mechanism for libgomp. This type is private to the library. */
|
||||
|
||||
#ifndef GOMP_MUTEX_H
|
||||
#define GOMP_MUTEX_H 1
|
||||
|
||||
#include <sys/lock.h>
|
||||
|
||||
typedef struct _Mutex_Control gomp_mutex_t;
|
||||
|
||||
#define GOMP_MUTEX_INIT_0 1
|
||||
|
||||
static inline void gomp_mutex_init (gomp_mutex_t *mutex)
|
||||
{
|
||||
_Mutex_Initialize (mutex);
|
||||
}
|
||||
|
||||
static inline void gomp_mutex_lock (gomp_mutex_t *mutex)
|
||||
{
|
||||
_Mutex_Acquire (mutex);
|
||||
}
|
||||
|
||||
static inline void gomp_mutex_unlock (gomp_mutex_t *mutex)
|
||||
{
|
||||
_Mutex_Release (mutex);
|
||||
}
|
||||
|
||||
static inline void gomp_mutex_destroy (gomp_mutex_t *mutex)
|
||||
{
|
||||
_Mutex_Destroy (mutex);
|
||||
}
|
||||
|
||||
#endif /* GOMP_MUTEX_H */
|
||||
1
libgomp/config/rtems/sem.c
Normal file
1
libgomp/config/rtems/sem.c
Normal file
|
|
@ -0,0 +1 @@
|
|||
/* Everything is in the header. */
|
||||
55
libgomp/config/rtems/sem.h
Normal file
55
libgomp/config/rtems/sem.h
Normal file
|
|
@ -0,0 +1,55 @@
|
|||
/* Copyright (C) 2015 Free Software Foundation, Inc.
|
||||
Contributed by Sebastian Huber <sebastian.huber@embedded-brains.de>.
|
||||
|
||||
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 is the RTEMS implementation of a semaphore synchronization
|
||||
mechanism for libgomp. This type is private to the library. */
|
||||
|
||||
#ifndef GOMP_SEM_H
|
||||
#define GOMP_SEM_H 1
|
||||
|
||||
#include <sys/lock.h>
|
||||
|
||||
typedef struct _Semaphore_Control gomp_sem_t;
|
||||
|
||||
static inline void gomp_sem_init (gomp_sem_t *sem, int value)
|
||||
{
|
||||
_Semaphore_Initialize (sem, (unsigned int) value);
|
||||
}
|
||||
|
||||
static inline void gomp_sem_wait (gomp_sem_t *sem)
|
||||
{
|
||||
_Semaphore_Wait (sem);
|
||||
}
|
||||
|
||||
static inline void gomp_sem_post (gomp_sem_t *sem)
|
||||
{
|
||||
_Semaphore_Post (sem);
|
||||
}
|
||||
|
||||
static inline void gomp_sem_destroy (gomp_sem_t *sem)
|
||||
{
|
||||
_Semaphore_Destroy (sem);
|
||||
}
|
||||
|
||||
#endif /* GOMP_SEM_H */
|
||||
17
libgomp/configure
vendored
17
libgomp/configure
vendored
|
|
@ -15340,6 +15340,23 @@ $as_echo "#define HAVE_BROKEN_POSIX_SEMAPHORES 1" >>confdefs.h
|
|||
;;
|
||||
esac
|
||||
|
||||
# RTEMS specific checks
|
||||
case "$host" in
|
||||
*-*-rtems*)
|
||||
ac_fn_c_check_type "$LINENO" "struct _Mutex_Control" "ac_cv_type_struct__Mutex_Control" "#include <sys/lock.h>
|
||||
"
|
||||
if test "x$ac_cv_type_struct__Mutex_Control" = x""yes; then :
|
||||
|
||||
cat >>confdefs.h <<_ACEOF
|
||||
#define HAVE_STRUCT__MUTEX_CONTROL 1
|
||||
_ACEOF
|
||||
|
||||
|
||||
fi
|
||||
|
||||
;;
|
||||
esac
|
||||
|
||||
# Check whether --enable-linux-futex was given.
|
||||
if test "${enable_linux_futex+set}" = set; then :
|
||||
enableval=$enable_linux_futex;
|
||||
|
|
|
|||
|
|
@ -216,6 +216,13 @@ case "$host" in
|
|||
;;
|
||||
esac
|
||||
|
||||
# RTEMS specific checks
|
||||
case "$host" in
|
||||
*-*-rtems*)
|
||||
AC_CHECK_TYPES([struct _Mutex_Control],[],[],[#include <sys/lock.h>])
|
||||
;;
|
||||
esac
|
||||
|
||||
GCC_LINUX_FUTEX(:)
|
||||
|
||||
# Check for pthread_{,attr_}[sg]etaffinity_np.
|
||||
|
|
|
|||
|
|
@ -153,6 +153,12 @@ case "${target}" in
|
|||
|
||||
nvptx*-*-*)
|
||||
config_path="nvptx"
|
||||
|
||||
*-*-rtems*)
|
||||
# Use self-contained synchronization objects if provided by Newlib
|
||||
if test "x$ac_cv_type_struct__Mutex_Control" = xyes ; then
|
||||
config_path="rtems posix"
|
||||
fi
|
||||
;;
|
||||
|
||||
*)
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue