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Diffstat (limited to 'gcc-4.2.1-5666.3/libgomp/critical.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/libgomp/critical.c | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/gcc-4.2.1-5666.3/libgomp/critical.c b/gcc-4.2.1-5666.3/libgomp/critical.c deleted file mode 100644 index 90821634b..000000000 --- a/gcc-4.2.1-5666.3/libgomp/critical.c +++ /dev/null @@ -1,149 +0,0 @@ -/* Copyright (C) 2005 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. - - 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 - 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. */ - -/* 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. */ - -/* This file handles the CRITICAL construct. */ - -#include "libgomp.h" -#include <stdlib.h> - - -static gomp_mutex_t default_lock; - -void -GOMP_critical_start (void) -{ - gomp_mutex_lock (&default_lock); -} - -void -GOMP_critical_end (void) -{ - gomp_mutex_unlock (&default_lock); -} - -#ifndef HAVE_SYNC_BUILTINS -static gomp_mutex_t create_lock_lock; -#endif - -void -GOMP_critical_name_start (void **pptr) -{ - gomp_mutex_t *plock; - - /* If a mutex fits within the space for a pointer, and is zero initialized, - then use the pointer space directly. */ - if (GOMP_MUTEX_INIT_0 - && sizeof (gomp_mutex_t) <= sizeof (void *) - && __alignof (gomp_mutex_t) <= sizeof (void *)) - plock = (gomp_mutex_t *)pptr; - - /* Otherwise we have to be prepared to malloc storage. */ - else - { - plock = *pptr; - - if (plock == NULL) - { -#ifdef HAVE_SYNC_BUILTINS - gomp_mutex_t *nlock = gomp_malloc (sizeof (gomp_mutex_t)); - gomp_mutex_init (nlock); - - plock = __sync_val_compare_and_swap (pptr, NULL, nlock); - if (plock != NULL) - { - gomp_mutex_destroy (nlock); - free (nlock); - } - else - plock = nlock; -#else - gomp_mutex_lock (&create_lock_lock); - plock = *pptr; - if (plock == NULL) - { - plock = gomp_malloc (sizeof (gomp_mutex_t)); - gomp_mutex_init (plock); - __sync_synchronize (); - *pptr = plock; - } - gomp_mutex_unlock (&create_lock_lock); -#endif - } - } - - gomp_mutex_lock (plock); -} - -void -GOMP_critical_name_end (void **pptr) -{ - gomp_mutex_t *plock; - - /* If a mutex fits within the space for a pointer, and is zero initialized, - then use the pointer space directly. */ - if (GOMP_MUTEX_INIT_0 - && sizeof (gomp_mutex_t) <= sizeof (void *) - && __alignof (gomp_mutex_t) <= sizeof (void *)) - plock = (gomp_mutex_t *)pptr; - else - plock = *pptr; - - gomp_mutex_unlock (plock); -} - -/* This mutex is used when atomic operations don't exist for the target - in the mode requested. The result is not globally atomic, but works so - long as all parallel references are within #pragma omp atomic directives. - According to responses received from omp@openmp.org, appears to be within - spec. Which makes sense, since that's how several other compilers - handle this situation as well. */ - -static gomp_mutex_t atomic_lock; - -void -GOMP_atomic_start (void) -{ - gomp_mutex_lock (&atomic_lock); -} - -void -GOMP_atomic_end (void) -{ - gomp_mutex_unlock (&atomic_lock); -} - -#if !GOMP_MUTEX_INIT_0 -static void __attribute__((constructor)) -initialize_critical (void) -{ - gomp_mutex_init (&default_lock); - gomp_mutex_init (&atomic_lock); -#ifndef HAVE_SYNC_BUILTINS - gomp_mutex_init (&create_lock_lock); -#endif -} -#endif |