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Diffstat (limited to '')
| -rw-r--r-- | src/common/likely.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/common/likely.h b/src/common/likely.h new file mode 100644 index 000000000..abaf2d2e2 --- /dev/null +++ b/src/common/likely.h @@ -0,0 +1,31 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Ceph - scalable distributed file system + * + * Copyright (C) 2010 Dreamhost + * + * This is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software + * Foundation. See file COPYING. + * + */ + +#ifndef CEPH_LIKELY_DOT_H +#define CEPH_LIKELY_DOT_H + +/* + * Likely / Unlikely macros + */ +#ifndef likely +#define likely(x) __builtin_expect((x),1) +#endif +#ifndef unlikely +#define unlikely(x) __builtin_expect((x),0) +#endif +#ifndef expect +#define expect(x, hint) __builtin_expect((x),(hint)) +#endif + +#endif |