1 // Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 #ifndef __ESP_ASSERT_H__ 15 #define __ESP_ASSERT_H__ 16 17 #include "assert.h" 18 19 /* Assert at compile time if possible, runtime otherwise */ 20 #ifndef __cplusplus 21 /* __builtin_choose_expr() is only in C, makes this a lot cleaner */ 22 #define TRY_STATIC_ASSERT(CONDITION, MSG) do { \ 23 _Static_assert(__builtin_choose_expr(__builtin_constant_p(CONDITION), (CONDITION), 1), #MSG); \ 24 assert(#MSG && (CONDITION)); \ 25 } while(0) 26 #else 27 /* for C++, use __attribute__((error)) - works almost as well as _Static_assert */ 28 #define TRY_STATIC_ASSERT(CONDITION, MSG) do { \ 29 if (__builtin_constant_p(CONDITION) && !(CONDITION)) { \ 30 extern __attribute__((error(#MSG))) void failed_compile_time_assert(void); \ 31 failed_compile_time_assert(); \ 32 } \ 33 assert(#MSG && (CONDITION)); \ 34 } while(0) 35 #endif /* __cplusplus */ 36 37 #endif /* __ESP_ASSERT_H__ */ 38