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authorWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:04:02 -0600
committerWaldemar Brodkorb <wbx@openadk.org>2015-02-14 23:04:02 -0600
commite1e46622ac0fce73d802fa4a8a2e83cc25cd9e7a (patch)
tree2c8d14e4dcc733f4227f0984ed05da5826b13acd /libpthread/linuxthreads/sysdeps/cris/pspinlock.c
parent6b6ede3d15f04fe825cfa9f697507457e3640344 (diff)
Revert "resolve merge"
This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344.
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/cris/pspinlock.c')
-rw-r--r--libpthread/linuxthreads/sysdeps/cris/pspinlock.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/cris/pspinlock.c b/libpthread/linuxthreads/sysdeps/cris/pspinlock.c
new file mode 100644
index 000000000..7e3e62959
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/cris/pspinlock.c
@@ -0,0 +1,71 @@
+/* POSIX spinlock implementation. CRIS version.
+ Copyright (C) 2000, 2001 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library 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.
+
+ The GNU C Library 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 the GNU C Library; see the file COPYING.LIB. If
+ not, see <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <pthread.h>
+#include "internals.h"
+
+/* FIXME: These are just dummies. I don't know why or if they're needed;
+ configury should default to these definitions. We just follow the
+ crowd here. */
+
+int
+__pthread_spin_lock (pthread_spinlock_t *lock)
+{
+ while (testandset (lock) != 0)
+ ;
+
+ return 0;
+}
+weak_alias (__pthread_spin_lock, pthread_spin_lock)
+
+
+int
+__pthread_spin_trylock (pthread_spinlock_t *lock)
+{
+ return testandset (lock) != 0 ? EBUSY : 0;
+}
+weak_alias (__pthread_spin_trylock, pthread_spin_trylock)
+
+
+int
+__pthread_spin_unlock (pthread_spinlock_t *lock)
+{
+ return *lock = 0;
+}
+weak_alias (__pthread_spin_unlock, pthread_spin_unlock)
+
+
+int
+__pthread_spin_init (pthread_spinlock_t *lock, int pshared)
+{
+ /* We can ignore the `pshared' parameter. Since we are busy-waiting
+ all processes which can access the memory location `lock' points
+ to can use the spinlock. */
+ return *lock = 0;
+}
+weak_alias (__pthread_spin_init, pthread_spin_init)
+
+
+int
+__pthread_spin_destroy (pthread_spinlock_t *lock)
+{
+ /* Nothing to do. */
+ return 0;
+}
+weak_alias (__pthread_spin_destroy, pthread_spin_destroy)