Daily bump.

[pf3gnuchains/gcc-fork.git] / libgomp / task.c

diff --git a/libgomp/task.c b/libgomp/task.c
index ce991b8..4b75850 100644 (file)
--- a/libgomp/task.c
+++ b/libgomp/task.c
@@ -1,29 +1,26 @@
-/* Copyright (C) 2007, 2008 Free Software Foundation, Inc.
+/* Copyright (C) 2007, 2008, 2009, 2011 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 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.
+   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 Lesser General Public License for
+   FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
    more details.
 
-   You should have received a copy of the GNU Lesser General Public License 
-   along with libgomp; see the file COPYING.LIB.  If not, write to the
-   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
-   MA 02110-1301, USA.  */
+   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.
 
-/* As a special exception, if you link this library with other files, some
-   of which are compiled with GCC, to produce an executable, this library
-   does not by itself cause the resulting executable to be covered by the
-   GNU General Public License.  This exception does not however invalidate
-   any other reasons why the executable file might be covered by the GNU
-   General Public License.  */
+   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 maintainence of tasks in response to task
    creation and termination.  */
@@ -44,6 +41,7 @@ gomp_init_task (struct gomp_task *task, struct gomp_task *parent_task,
   task->kind = GOMP_TASK_IMPLICIT;
   task->in_taskwait = false;
   task->in_tied_task = false;
+  task->final_task = false;
   task->children = NULL;
   gomp_sem_init (&task->taskwait_sem, 0);
 }
@@ -80,8 +78,7 @@ gomp_clear_parent (struct gomp_task *children)
 
 void
 GOMP_task (void (*fn) (void *), void *data, void (*cpyfn) (void *, void *),
-          long arg_size, long arg_align, bool if_clause,
-          unsigned flags __attribute__((unused)))
+          long arg_size, long arg_align, bool if_clause, unsigned flags)
 {
   struct gomp_thread *thr = gomp_thread ();
   struct gomp_team *team = thr->ts.team;
@@ -98,12 +95,14 @@ GOMP_task (void (*fn) (void *), void *data, void (*cpyfn) (void *, void *),
 #endif
 
   if (!if_clause || team == NULL
+      || (thr->task && thr->task->final_task)
       || team->task_count > 64 * team->nthreads)
     {
       struct gomp_task task;
 
       gomp_init_task (&task, thr->task, gomp_icv (false));
       task.kind = GOMP_TASK_IFFALSE;
+      task.final_task = (thr->task && thr->task->final_task) || (flags & 2);
       if (thr->task)
        task.in_tied_task = thr->task->in_tied_task;
       thr->task = &task;
@@ -117,10 +116,11 @@ GOMP_task (void (*fn) (void *), void *data, void (*cpyfn) (void *, void *),
        }
       else
        fn (data);
-      if (task.children)
+      if (team != NULL)
        {
          gomp_mutex_lock (&team->task_lock);
-         gomp_clear_parent (task.children);
+         if (task.children != NULL)
+           gomp_clear_parent (task.children);
          gomp_mutex_unlock (&team->task_lock);
        }
       gomp_end_task ();
@@ -148,6 +148,7 @@ GOMP_task (void (*fn) (void *), void *data, void (*cpyfn) (void *, void *),
       task->fn = fn;
       task->fn_data = arg;
       task->in_tied_task = true;
+      task->final_task = (flags & 2) >> 1;
       gomp_mutex_lock (&team->task_lock);
       if (parent->children)
        {
@@ -273,6 +274,7 @@ gomp_barrier_handle_tasks (gomp_barrier_state_t state)
              gomp_team_barrier_done (&team->barrier, state);
              gomp_mutex_unlock (&team->task_lock);
              gomp_team_barrier_wake (&team->barrier, 0);
+             gomp_mutex_lock (&team->task_lock);
            }
        }
     }
@@ -289,8 +291,9 @@ GOMP_taskwait (void)
   struct gomp_task *child_task = NULL;
   struct gomp_task *to_free = NULL;
 
-  if (task == NULL || task->children == NULL)
+  if (task == NULL || team == NULL)
     return;
+
   gomp_mutex_lock (&team->task_lock);
   while (1)
     {
@@ -365,3 +368,20 @@ GOMP_taskwait (void)
        }
     }
 }
+
+/* Called when encountering a taskyield directive.  */
+
+void
+GOMP_taskyield (void)
+{
+  /* Nothing at the moment.  */
+}
+
+int
+omp_in_final (void)
+{
+  struct gomp_thread *thr = gomp_thread ();
+  return thr->task && thr->task->final_task;
+}
+
+ialias (omp_in_final)