| // Copyright 2023 The Dawn & Tint Authors |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // 1. Redistributions of source code must retain the above copyright notice, this |
| // list of conditions and the following disclaimer. |
| // |
| // 2. Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
| // and/or other materials provided with the distribution. |
| // |
| // 3. Neither the name of the copyright holder nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef SRC_TINT_UTILS_MACROS_STATIC_INIT_H_ |
| #define SRC_TINT_UTILS_MACROS_STATIC_INIT_H_ |
| |
| #include "src/tint/utils/macros/concat.h" |
| |
| /// A helper macro that executes STATEMENT the first time the macro comes into scope - typically |
| /// used at global scope to call a function before main() is run. |
| /// For example: `TINT_STATIC_INIT(CallAtStartup(1,2,3));` |
| /// @note: This must not be used at global scope in production code, as this violates the Chromium |
| /// rules around static initializers. Attempting to do this will result in a compilation error. |
| #define TINT_STATIC_INIT(STATEMENT) \ |
| [[maybe_unused]] static const bool TINT_CONCAT(tint_static_init_, __COUNTER__) = [] { \ |
| STATEMENT; \ |
| return true; \ |
| }() |
| |
| #endif // SRC_TINT_UTILS_MACROS_STATIC_INIT_H_ |
