Add a custom atomic.h file which implements the C versions of the

code we already have assembly versions of.

Written by:	imp

1 files changed, 59 insertions, 0 deletions

diff --git a/contrib/bind9/lib/isc/arm/include/isc/atomic.h b/contrib/bind9/lib/isc/arm/include/isc/atomic.h
new file mode 100644
index 000000000000..272edd88c27c
--- /dev/null
+++ b/contrib/bind9/lib/isc/arm/include/isc/atomic.h
@@ -0,0 +1,59 @@
+/*-
+ * Copyright (c) 2007 Warner Losh
+ * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 ISC_ATOMIC_H
+#define ISC_ATOMIC_H 1
+
+#include <isc/platform.h>
+#include <isc/types.h>
+#include <machine/atomic.h>
+
+#ifdef __FreeBSD__
+static inline isc_int32_t
+isc_atomic_xadd(isc_int32_t *p, isc_int32_t val)
+{
+	return atomic_fetchadd_int(p, val);
+}
+
+static inline void
+isc_atomic_store(isc_int32_t *p, isc_int32_t val)
+{
+	atomic_store_rel_int(p, val);
+}
+
+static inline isc_int32_t
+isc_atomic_cmpxchg(isc_int32_t *p, isc_int32_t cmpval, isc_int32_t val)
+{
+	return atomic_cmpset_int(p, cmpval, val);
+}
+#else /* !FreeBSD */
+
+#error "unsupported compiler.  disable atomic ops by --disable-atomic"
+
+#endif
+#endif /* ISC_ATOMIC_H */