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diff --git a/ipc/param_traits_macros.h b/ipc/param_traits_macros.h
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+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IPC_PARAM_TRAITS_MACROS_H_
+#define IPC_PARAM_TRAITS_MACROS_H_
+
+#include <string>
+
+// Traits generation for structs.
+#define IPC_STRUCT_TRAITS_BEGIN(struct_name) \
+ namespace IPC { \
+ template <> \
+ struct ParamTraits<struct_name> { \
+ typedef struct_name param_type; \
+ static void Write(Message* m, const param_type& p); \
+ static bool Read(const Message* m, void** iter, param_type* p); \
+ static void Log(const param_type& p, std::string* l); \
+ }; \
+ }
+
+#define IPC_STRUCT_TRAITS_MEMBER(name)
+#define IPC_STRUCT_TRAITS_PARENT(type)
+#define IPC_STRUCT_TRAITS_END()
+
+// Traits generation for enums.
+#define IPC_ENUM_TRAITS(enum_name) \
+ namespace IPC { \
+ template <> \
+ struct ParamTraits<enum_name> { \
+ typedef enum_name param_type; \
+ static void Write(Message* m, const param_type& p); \
+ static bool Read(const Message* m, void** iter, param_type* p); \
+ static void Log(const param_type& p, std::string* l); \
+ }; \
+ }
+
+#endif // IPC_PARAM_TRAITS_MACROS_H_
+