X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=include%2Fbabeltrace%2Fcompiler.h;h=09189bce084077b6b1b7a67e70c72c2917f606d4;hp=7850ded675a3bb75ce892e2f74d75fcb915561ab;hb=c462e188f3e7819c7bc74f671038cdbf36e8c3c0;hpb=d79865b92da224131f58ab311e75e49043b62c7a

diff --git a/include/babeltrace/compiler.h b/include/babeltrace/compiler.h
index 7850ded6..09189bce 100644
--- a/include/babeltrace/compiler.h
+++ b/include/babeltrace/compiler.h
@@ -1,6 +1,40 @@
 #ifndef _BABELTRACE_COMPILER_H
 #define _BABELTRACE_COMPILER_H
 
+/*
+ * compiler.h
+ *
+ * Copyright 2010 - 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.
+ *
+ * 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.
+ */
+
+#include <stddef.h>	/* for offsetof */
+
 #define MAYBE_BUILD_BUG_ON(cond) ((void)sizeof(char[1 - 2 * !!(cond)]))
 
+#ifndef container_of
+#define container_of(ptr, type, member)					\
+	({								\
+		const typeof(((type *)NULL)->member) * __ptr = (ptr);	\
+		(type *)((char *)__ptr - offsetof(type, member));	\
+	})
+#endif
+
 #endif /* _BABELTRACE_COMPILER_H */