X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=src%2Fcommon%2Fbug.h;fp=src%2Fcommon%2Fbug.h;h=9368c08976a345ec4a45ca365bbfd01d2b55abd3;hb=c1b2f2e24cda9b60bce9380a3967b9207293a32d;hp=0000000000000000000000000000000000000000;hpb=008b967517e476b78600006565a7a1276d4023d6;p=lttng-tools.git

diff --git a/src/common/bug.h b/src/common/bug.h
new file mode 100644
index 000000000..9368c0897
--- /dev/null
+++ b/src/common/bug.h
@@ -0,0 +1,54 @@
+#ifndef _LTTNG_BUG_H
+#define _LTTNG_BUG_H
+
+/*
+ * lttng/bug.h
+ *
+ * (C) Copyright 2010-2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * 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.
+ */
+
+#include <urcu/compiler.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define LTTNG_BUG_ON(condition)						\
+	do {								\
+		if (caa_unlikely(condition)) {				\
+			fprintf(stderr,					\
+				"LTTng BUG in file %s, line %d.\n",	\
+				__FILE__, __LINE__);			\
+			exit(EXIT_FAILURE);				\
+		}							\
+	} while (0)
+
+#define LTTNG_BUILD_BUG_ON(condition)					\
+	((void) sizeof(char[-!!(condition)]))
+
+/**
+ * LTTNG_BUILD_RUNTIME_BUG_ON - check condition at build (if constant) or runtime
+ * @condition: the condition which should be false.
+ *
+ * If the condition is a constant and true, the compiler will generate a build
+ * error. If the condition is not constant, a BUG will be triggered at runtime
+ * if the condition is ever true. If the condition is constant and false, no
+ * code is emitted.
+ */
+#define LTTNG_BUILD_RUNTIME_BUG_ON(condition)			\
+	do {							\
+		if (__builtin_constant_p(condition))		\
+			LTTNG_BUILD_BUG_ON(condition);		\
+		else						\
+			LTTNG_BUG_ON(condition);		\
+	} while (0)
+
+#endif