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Diffstat (limited to '')
| -rw-r--r-- | lib/isc/include/isc/likely.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/isc/include/isc/likely.h b/lib/isc/include/isc/likely.h new file mode 100644 index 0000000..6c77957 --- /dev/null +++ b/lib/isc/include/isc/likely.h @@ -0,0 +1,26 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#ifndef ISC_LIKELY_H +#define ISC_LIKELY_H 1 + +/*% + * Performance + */ +#ifdef HAVE_BUILTIN_EXPECT +#define ISC_LIKELY(x) __builtin_expect((x), 1) +#define ISC_UNLIKELY(x) __builtin_expect((x), 0) +#else +#define ISC_LIKELY(x) (x) +#define ISC_UNLIKELY(x) (x) +#endif + +#endif /* ISC_LIKELY_H */ |