Add locking primitive for hppa. ok kettenis@

1 files changed, 30 insertions, 0 deletions

diff --git a/lib/librthread/arch/hppa/_atomic_lock.c b/lib/librthread/arch/hppa/_atomic_lock.c
new file mode 100644
index 00000000000..98805c57daf
--- /dev/null
+++ b/lib/librthread/arch/hppa/_atomic_lock.c
@@ -0,0 +1,30 @@
+/* $OpenBSD: _atomic_lock.c,v 1.1 2005/12/14 17:21:01 marco Exp $ */
+/*
+ * Copyright (c) 2005 Marco Peereboom <marco@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <machine/spinlock.h>
+
+int
+_atomic_lock(register volatile _spinlock_lock_t *lock)
+{
+	_spinlock_lock_t old;
+
+	asm volatile ("ldcw %1,%0"
+		     : "=r" (old), "=m" (*lock)
+		     : "m" (*lock));
+
+	return (old == _SPINLOCK_UNLOCKED);
+}