From 7b09710392d35fb55b52031d447a542d99fc6b4b Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Tue, 19 Aug 2014 17:10:03 -0400 Subject: Modularize the libdimension codebase. --- libdimension/internal/profile.h | 68 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 libdimension/internal/profile.h (limited to 'libdimension/internal/profile.h') diff --git a/libdimension/internal/profile.h b/libdimension/internal/profile.h new file mode 100644 index 0000000..0f59b8f --- /dev/null +++ b/libdimension/internal/profile.h @@ -0,0 +1,68 @@ +/************************************************************************* + * Copyright (C) 2010-2011 Tavian Barnes * + * * + * This file is part of The Dimension Library. * + * * + * The Dimension Library is free software; you can redistribute it and/ * + * or modify it under the terms of the GNU Lesser General Public License * + * as published by the Free Software Foundation; either version 3 of the * + * License, or (at your option) any later version. * + * * + * The Dimension Library 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 GNU * + * Lesser General Public License for more details. * + * * + * You should have received a copy of the GNU Lesser General Public * + * License along with this program. If not, see * + * . * + *************************************************************************/ + +/** + * @file + * Built-in branch profiler. + */ + +#ifndef DMNSN_INTERNAL_H +#error "Please include \"internal.h\" instead of this header directly." +#endif + +#include + +/** + * @def dmnsn_likely + * Indicate that a test is likely to succeed. + * @param test The test to perform. + * @return The truth value of \p test. + */ +/** + * @def dmnsn_unlikely + * Indicate that a test is unlikely to succeed. + * @param test The test to perform. + * @return The truth value of \p test. + */ +#ifdef DMNSN_PROFILE + #define dmnsn_likely(test) \ + dmnsn_expect(!!(test), true, DMNSN_FUNC, __FILE__, __LINE__) + #define dmnsn_unlikely(test) \ + dmnsn_expect(!!(test), false, DMNSN_FUNC, __FILE__, __LINE__) +#elif DMNSN_GNUC + #define dmnsn_likely(test) __builtin_expect(!!(test), true) + #define dmnsn_unlikely(test) __builtin_expect(!!(test), false) +#else + #define dmnsn_likely(test) (!!(test)) + #define dmnsn_unlikely(test) (!!(test)) +#endif + +/** + * Record a test and its expected result. Called by dmnsn_[un]likely(); + * don't call directly. + * @param[in] result The result of the test. + * @param[in] expected The expected result of the test. + * @param[in] func The name of the function the test occurs in. + * @param[in] file The name of the file the test occurs in. + * @param[in] line The line number on which the test occurs. + * @return \p result. + */ +DMNSN_INTERNAL bool dmnsn_expect(bool result, bool expected, const char *func, + const char *file, unsigned int line); -- cgit v1.2.3