1 files changed, 58 insertions, 0 deletions
diff --git a/freebsd/sys/sys/_bitset.h b/freebsd/sys/sys/_bitset.h
new file mode 100644
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+++ b/freebsd/sys/sys/_bitset.h
@@ -0,0 +1,58 @@
+/*-
+ * Copyright (c) 2008, Jeffrey Roberson <jeff@freebsd.org>
+ * All rights reserved.
+ *
+ * Copyright (c) 2008 Nokia Corporation
+ * 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 unmodified, 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 _SYS__BITSET_H_
+#define	_SYS__BITSET_H_
+
+/*
+ * Macros addressing word and bit within it, tuned to make compiler
+ * optimize cases when SETSIZE fits into single machine word.
+ */
+#define	_BITSET_BITS		(sizeof(long) * 8)
+
+#define	__howmany(x, y)	(((x) + ((y) - 1)) / (y))
+
+#define	__bitset_words(_s)	(__howmany(_s, _BITSET_BITS))
+
+#define	BITSET_DEFINE(t, _s)						\
+struct t {								\
+        long    __bits[__bitset_words((_s))];				\
+}
+
+/*
+ * Helper to declare a bitset without it's size being a constant.
+ *
+ * Sadly we cannot declare a bitset struct with '__bits[]', because it's
+ * the only member of the struct and the compiler complains.
+ */
+#define BITSET_DEFINE_VAR(t)	BITSET_DEFINE(t, 1)
+
+#endif /* !_SYS__BITSET_H_ */