| /** |
| * Copyright 2017 Nest Labs Inc. All Rights Reserved. |
| * |
| * 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. |
| */ |
| |
| /** |
| * @file |
| * This file defines private macros and interfaces. |
| */ |
| |
| #ifndef NLIO_PRIVATE_H |
| #define NLIO_PRIVATE_H |
| |
| /* |
| * If we are compiling under clang, GCC, or any such compatible |
| * compiler, in which -fno-builtins or -ffreestanding might be |
| * asserted, thereby eliminating built-in function optimization, we |
| * may STILL want to leverage built-ins. |
| * |
| * Provide an internal convenience macro to do so. |
| */ |
| |
| /** |
| * @def __nlIOHasBuiltin |
| * |
| * @brief |
| * Determines whether or not the compiler in effect has support |
| * for the specified built-in function. |
| * |
| */ |
| #ifdef __clang__ |
| #define __nlIOHasBuiltin(...) __has_builtin(__VA_ARGS__) |
| #elif defined __GNUC__ |
| #define __nlIOHasBuiltin(...) 1 |
| #else |
| #define __nlIOHasBuiltin(...) 0 |
| #endif /* __clang__ */ |
| |
| #endif /* NLIO_PRIVATE_H */ |