| /* |
| * Copyright 2018 Google LLC |
| * |
| * 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 |
| * |
| * https://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. |
| */ |
| |
| #pragma once |
| |
| #ifdef GEN_OFFSETS |
| |
| /* When generating offsets, create constants which can be extracted from the |
| * generated assembly. */ |
| |
| #define DECL(name, type, field) \ |
| const size_t DEFINE_OFFSET__##name = offsetof(type, field) |
| |
| #define DECL_SIZE(name, type) const size_t DEFINE_OFFSET__name = sizeof(type) |
| |
| #else /* GEN_OFFSETS */ |
| |
| /* When not generating offsets, validate that the extracted values are as |
| * expected. */ |
| |
| #include <assert.h> |
| |
| #define DECL(name, type, field) DECL_1(#name, name, offsetof(type, field)) |
| #define DECL_1(name, actual, expected) \ |
| static_assert((actual) == (expected), \ |
| "Offset " name " should be " #expected \ |
| " and not " #actual) |
| |
| #define DECL_SIZE(name, type) DECL_SIZE_1(#name, name, sizeof(type)) |
| #define DECL_SIZE_1(name, actual, expected) \ |
| static_assert((actual) == (expected), \ |
| "Size " #name " should be " #expected \ |
| " and not" #actual) |
| |
| #endif /* GEN_OFFSETS */ |