Add compile assertions to enforce the sizes of all structs and enums in the C...

ppapi/tests/test_struct_sizes.c

+/* Copyright (c) 2010 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.
+ *
+ * This test ensures (at compile time) that some types have the expected size in
+ * C.  The purpose is to ensure that the ABI of PPAPI is known, consistent, and
+ * stable.  Only structs that have architecture-dependent size are checked by
+ * this test.  These structs use at least one type which differs in size between
+ * 64-bit and 32-bit (e.g. pointers or long).  By convention, we require other
+ * types to be of consistent size on 32-bit and 64-bit architectures.
+ */
+
+#include "ppapi/tests/all_c_includes.h"
+
+#if !defined(__native_client__) && (defined(_M_X64) || defined(__x86_64__))
+/* This section is for 64-bit compilation on Windows, Mac, and Linux.  Native
+   client follows ILP32 even if -m64 is used, so NaCl code is explicitly treated
+   as 32-bit.  This means pointers are always 4 bytes in native client, and it
+   matches Win32  (see below).
+ */
+#include "ppapi/tests/arch_dependent_sizes_64.h"
+#else
+/* This section is for compilation on 32-bit targets plus native client (in both
+   32-bit and 64-bit mode, since native client always conforms to ILP32).
+ */
+#include "ppapi/tests/arch_dependent_sizes_32.h"
+#endif
+