1 files changed, 98 insertions, 0 deletions
diff --git a/compiler/simpleops-compiler-utils.h b/compiler/simpleops-compiler-utils.h
new file mode 100644
index 0000000..187386d
--- /dev/null
+++ b/compiler/simpleops-compiler-utils.h
@@ -0,0 +1,98 @@
+/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
+/*
+ * Copyright 2010-2011 Andrea Canciani
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Author(s): Andrea Canciani <ranma42@gmail.com>
+ */
+
+#ifndef SIMPLEOPS_COMPILER_UTILS_H
+#define SIMPLEOPS_COMPILER_UTILS_H
+
+#ifndef SIMPLEOPS_COMPILER_H
+#error Private header used directly
+#endif
+
+/**
+ * Computes the number of elements of an array
+ */
+#define SIMPLEOPS_ARRAY_LENGTH(x) (sizeof (x) / sizeof (x[0]))
+
+#define _SIMPLEOPS_CONCAT(x,y) x ## y
+#define _SIMPLEOPS_RESOLVE_CONCAT(x,y) _SIMPLEOPS_CONCAT(x,y)
+
+/**
+ * Prepends the SIMPLEOPS_PREFIX to the argument.
+ *
+ * This macro is used to generate non-static identifiers that do not
+ * collide across multiple libraries. In order to use it,
+ * SIMPLEOPS_PREFIX should be defined to an appropriate identifier.
+ */
+#define SIMPLEOPS_ADD_PREFIX(x) _SIMPLEOPS_RESOLVE_CONCAT(SIMPLEOPS_PREFIX, x)
+
+#define _SIMPLEOPS_COMPILE_TIME_RAW_ASSERT(condition, line)		\
+    typedef int compile_time_assertion_at_line_##line##_failed [(condition)?1:-1]
+#define _SIMPLEOPS_COMPILE_TIME_RESOLVE_ASSERT(condition, line)	\
+    _SIMPLEOPS_COMPILE_TIME_RAW_ASSERT(condition, line)
+
+/**
+ * Asserts that the condition is TRUE at compile time.
+ *
+ * Conditions that cannot be evaluated at compile time cannot be used
+ * in these assertions.
+ */
+#define SIMPLEOPS_COMPILE_TIME_ASSERT(condition)	\
+    _SIMPLEOPS_COMPILE_TIME_RESOLVE_ASSERT(condition, __LINE__)
+
+
+#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
+
+#define _SIMPLEOPS_BOOLEAN_EXPR(expr) ((expr) ? TRUE : FALSE)
+
+#define SIMPLEOPS_LIKELY(expr) \
+    (__builtin_expect (_SIMPLEOPS_BOOLEAN_EXPR (expr), TRUE))
+#define SIMPLEOPS_UNLIKELY(expr) \
+    (__builtin_expect (_SIMPLEOPS_BOOLEAN_EXPR (expr), FALSE))
+
+#else
+
+/**
+ * Provides an hint to the compiler that the expression is probably
+ * going to be TRUE and evaluates to the value of the expression.
+ */
+#define SIMPLEOPS_LIKELY(expr) (expr)
+
+/**
+ * Provides an hint to the compiler that the expression is probably
+ * going to be FALSE and evaluates to the value of the expression.
+ */
+#define SIMPLEOPS_UNLIKELY(expr) (expr)
+#endif
+
+/**
+ * Computes the address of a structure given its type and the address
+ * and name of one of its fields.
+ */
+#define SIMPLEOPS_CONTAINER_OF(ptr, type, member)	\
+    ((type*)(((char *) ptr) - offsetof (type, member)))
+
+#endif