1 files changed, 68 insertions, 0 deletions
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 <tavianator@tavianator.com>     *
+ *                                                                       *
+ * 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                         *
+ * <http://www.gnu.org/licenses/>.                                       *
+ *************************************************************************/
+
+/**
+ * @file
+ * Built-in branch profiler.
+ */
+
+#ifndef DMNSN_INTERNAL_H
+#error "Please include \"internal.h\" instead of this header directly."
+#endif
+
+#include <stdbool.h>
+
+/**
+ * @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);