diff options
author | Martin Sustrik <sustrik@fastmq.commkdir> | 2009-12-10 21:34:40 +0100 |
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committer | Martin Sustrik <sustrik@fastmq.commkdir> | 2009-12-10 21:34:40 +0100 |
commit | 770178724f9493e99c832863031aef016f143e9f (patch) | |
tree | a5cca5e3e6158fb718bdd828ca7cd390e9fa6866 /src/likely.hpp | |
parent | d4fdc26efc6b21103e446f712a484af910a57f2f (diff) |
errors are never predicted in branch prediction (likely/unlikely macros added)
Diffstat (limited to 'src/likely.hpp')
-rw-r--r-- | src/likely.hpp | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/likely.hpp b/src/likely.hpp new file mode 100644 index 0000000..3ca7bd6 --- /dev/null +++ b/src/likely.hpp @@ -0,0 +1,32 @@ +/* + Copyright (c) 2007-2009 FastMQ Inc. + + This file is part of 0MQ. + + 0MQ is free software; you can redistribute it and/or modify it under + the terms of the Lesser GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + 0MQ is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + Lesser GNU General Public License for more details. + + You should have received a copy of the Lesser GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef __ZMQ_LIKELY_HPP_INCLUDED__ +#define __ZMQ_LIKELY_HPP_INCLUDED__ + +#if defined __GNUC__ +#define likely(x) __builtin_expect ((x), 1) +#define unlikely(x) __builtin_expect ((x), 0) +#else +#define likely(x) (x) +#define unlikely(x) (x) +#endif + + +#endif |