Attempt at allowing to use C++ structures in C only code: We use the

CreateAsmStructOffsetsHeader mechanism to generate a header with macros
defined to the sizes of the structures we're interested in and when compiling
in C mode define the structures as "struct { char bytes[size]; }".
It works in principle, but due to how jam works, one would have to specify the
dependency to the generated header for all sources that include it directly or
indirectly.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34441 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/kernel/kernel_c++_structs.cpp

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2009, Ingo Weinhold, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include <computed_asm_macros.h>
+
+#include <condition_variable.h>
+
+
+// NOTE: Don't include <kernel_c++_structs.h>, since that would result in a
+// circular dependency.
+
+
+#define DEFINE_SIZE_MACRO(name) \
+    DEFINE_COMPUTED_ASM_MACRO(_KERNEL_CPP_STRUCT_SIZE_##name, sizeof(name));
+
+
+void
+dummy()
+{
+	DEFINE_SIZE_MACRO(ConditionVariable)
+}