Enforce Treble "wire" ABI by emitting static_asserts for the sizes of
hidl types, such as hidl_handle, hidl_memory, hidl_string and friends.
Bug: 33846034
Test: make
Change-Id: I859b5a7185e2c3e59ef5665e8f8c1f5bb34bced3
diff --git a/HidlTypeAssertion.h b/HidlTypeAssertion.h
new file mode 100644
index 0000000..8ac23ff
--- /dev/null
+++ b/HidlTypeAssertion.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef HIDL_TYPE_ASSERTIONS_H_
+
+#define HIDL_TYPE_ASSERTIONS_H_
+
+#include <android-base/macros.h>
+
+namespace android {
+
+struct Formatter;
+
+// Declare a HidlTypeAssertion at static scope to enforce a size requirement
+// on a type (assumed to be declared in namespace ::android::hardware).
+// This will cause the C++ backend of hidl-gen to emit the appropriate
+// static_assert(...) statements at the end of FooAll.cpp.
+struct HidlTypeAssertion {
+ HidlTypeAssertion(const char *name, size_t size);
+
+ size_t size() const;
+
+ static void EmitAll(Formatter &out);
+
+private:
+ size_t mSize;
+
+ DISALLOW_COPY_AND_ASSIGN(HidlTypeAssertion);
+};
+
+} // namespace android
+
+#endif // HIDL_TYPE_ASSERTIONS_H_