Implement atomic_swap_{int|long|ptr}. Define atomic_swap_ptr as a

macro that expands to atomic_swap_long() to avoid compiler warnings
caused by incompatible pointer passing.

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/libkse/arch/ia64/include/atomic_ops.h b/lib/libkse/arch/ia64/include/atomic_ops.h
new file mode 100644
index 0000000..483c905
--- /dev/null
+++ b/lib/libkse/arch/ia64/include/atomic_ops.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2003 Marcel Moolenaar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	_ATOMIC_OPS_H_
+#define	_ATOMIC_OPS_H_
+
+static inline void
+atomic_swap_int(int *dst, int val, int *res)
+{
+	__asm("xchg4	%0=[%2],%1" : "=r"(*res) : "r"(val), "r"(dst));
+}
+
+static inline void
+atomic_swap_long(long *dst, long val, long *res)
+{
+	__asm("xchg8	%0=[%2],%1" : "=r"(*res) : "r"(val), "r"(dst));
+}
+
+#define	atomic_swap_ptr(d,v,r)		\
+	atomic_swap_long((long*)d, (long)v, (long*)r)
+
+#endif /* _ATOMIC_OPS_H_ */