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| 1 | +/* |
| 2 | + * Copyright (c) 2025, Nordic Semiconductor ASA |
| 3 | + * All rights reserved. |
| 4 | + * |
| 5 | + * SPDX-License-Identifier: BSD-3-Clause |
| 6 | + * |
| 7 | + * Redistribution and use in source and binary forms, with or without |
| 8 | + * modification, are permitted provided that the following conditions are met: |
| 9 | + * |
| 10 | + * 1. Redistributions of source code must retain the above copyright notice, this |
| 11 | + * list of conditions and the following disclaimer. |
| 12 | + * |
| 13 | + * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | + * notice, this list of conditions and the following disclaimer in the |
| 15 | + * documentation and/or other materials provided with the distribution. |
| 16 | + * |
| 17 | + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its |
| 18 | + * contributors may be used to endorse or promote products derived from this |
| 19 | + * software without specific prior written permission. |
| 20 | + * |
| 21 | + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 22 | + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | + * IMPLIED WARRANTIES OF MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| 25 | + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 26 | + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 27 | + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 28 | + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 29 | + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 30 | + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 31 | + * POSSIBILITY OF SUCH DAMAGE. |
| 32 | + * |
| 33 | + */ |
| 34 | + |
| 35 | +#ifndef NRF_802154_COMPILER_H__ |
| 36 | +#define NRF_802154_COMPILER_H__ |
| 37 | + |
| 38 | +#ifdef __cplusplus |
| 39 | +extern "C" { |
| 40 | +#endif |
| 41 | + |
| 42 | +/** |
| 43 | + * @defgroup nrf_802154_config_compiler Compiler compatibility macros |
| 44 | + * @{ |
| 45 | + * @ingroup nrf_802154 |
| 46 | + * @brief Compiler compatibility macros for the 802.15.4 radio driver. |
| 47 | + */ |
| 48 | + |
| 49 | +/** |
| 50 | + * @def SWITCH_CASE_FALLTHROUGH |
| 51 | + * |
| 52 | + * Portable fallthrough annotation for switch case statements. |
| 53 | + * |
| 54 | + * This macro provides a portable way to annotate intentional fallthrough |
| 55 | + * between switch case labels across different C standards and compilers: |
| 56 | + * - C23: Uses [[fallthrough]] attribute |
| 57 | + * - GCC 7+/Clang: Uses __attribute__((fallthrough)) |
| 58 | + * - Older compilers: Falls back to comment-based annotation |
| 59 | + * |
| 60 | + * Usage: |
| 61 | + * @code |
| 62 | + * switch (value) { |
| 63 | + * case 1: |
| 64 | + * do_something(); |
| 65 | + * SWITCH_CASE_FALLTHROUGH; |
| 66 | + * case 2: |
| 67 | + * do_something_else(); |
| 68 | + * break; |
| 69 | + * } |
| 70 | + * @endcode |
| 71 | + */ |
| 72 | +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 202311L) |
| 73 | + /* C23 and later */ |
| 74 | + #define SWITCH_CASE_FALLTHROUGH [[fallthrough]] |
| 75 | +#elif defined(__has_attribute) |
| 76 | + /* Clang and GCC with __has_attribute support */ |
| 77 | + #if __has_attribute(fallthrough) |
| 78 | + #define SWITCH_CASE_FALLTHROUGH __attribute__((fallthrough)) |
| 79 | + #else |
| 80 | + #define SWITCH_CASE_FALLTHROUGH /* fallthrough */ |
| 81 | + #endif |
| 82 | +#elif defined(__GNUC__) && (__GNUC__ >= 7) |
| 83 | + /* GCC 7+ */ |
| 84 | + #define SWITCH_CASE_FALLTHROUGH __attribute__((fallthrough)) |
| 85 | +#elif defined(__clang__) |
| 86 | + /* Clang (older versions) */ |
| 87 | + #if defined(__clang_major__) && (__clang_major__ >= 10) |
| 88 | + #define SWITCH_CASE_FALLTHROUGH __attribute__((fallthrough)) |
| 89 | + #else |
| 90 | + #define SWITCH_CASE_FALLTHROUGH /* fallthrough */ |
| 91 | + #endif |
| 92 | +#else |
| 93 | + /* Fallback for other compilers */ |
| 94 | + #define SWITCH_CASE_FALLTHROUGH /* fallthrough */ |
| 95 | +#endif |
| 96 | + |
| 97 | +/** @} */ |
| 98 | + |
| 99 | +#ifdef __cplusplus |
| 100 | +} |
| 101 | +#endif |
| 102 | + |
| 103 | +#endif // NRF_802154_COMPILER_H__ |
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