| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Support for Intel Camera Imaging ISP subsystem. |
| * Copyright (c) 2015, Intel Corporation. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| */ |
| |
| #ifndef __ASSERT_SUPPORT_H_INCLUDED__ |
| #define __ASSERT_SUPPORT_H_INCLUDED__ |
| |
| /** |
| * The following macro can help to test the size of a struct at compile |
| * time rather than at run-time. It does not work for all compilers; see |
| * below. |
| * |
| * Depending on the value of 'condition', the following macro is expanded to: |
| * - condition==true: |
| * an expression containing an array declaration with negative size, |
| * usually resulting in a compilation error |
| * - condition==false: |
| * (void) 1; // C statement with no effect |
| * |
| * example: |
| * COMPILATION_ERROR_IF( sizeof(struct host_sp_queues) != SIZE_OF_HOST_SP_QUEUES_STRUCT); |
| * |
| * verify that the macro indeed triggers a compilation error with your compiler: |
| * COMPILATION_ERROR_IF( sizeof(struct host_sp_queues) != (sizeof(struct host_sp_queues)+1) ); |
| * |
| * Not all compilers will trigger an error with this macro; use a search engine to search for |
| * BUILD_BUG_ON to find other methods. |
| */ |
| #define COMPILATION_ERROR_IF(condition) ((void)sizeof(char[1 - 2 * !!(condition)])) |
| |
| /* Compile time assertion */ |
| #ifndef CT_ASSERT |
| #define CT_ASSERT(cnd) ((void)sizeof(char[(cnd) ? 1 : -1])) |
| #endif /* CT_ASSERT */ |
| |
| #include <linux/bug.h> |
| |
| /* TODO: it would be cleaner to use this: |
| * #define assert(cnd) BUG_ON(cnd) |
| * but that causes many compiler warnings (==errors) under Android |
| * because it seems that the BUG_ON() macro is not seen as a check by |
| * gcc like the BUG() macro is. */ |
| #define assert(cnd) \ |
| do { \ |
| if (!(cnd)) \ |
| BUG(); \ |
| } while (0) |
| |
| #ifndef PIPE_GENERATION |
| /* Deprecated OP___assert, this is still used in ~1000 places |
| * in the code. This will be removed over time. |
| * The implementation for the pipe generation tool is in see support.isp.h */ |
| #define OP___assert(cnd) assert(cnd) |
| |
| static inline void compile_time_assert(unsigned int cond) |
| { |
| /* Call undefined function if cond is false */ |
| void _compile_time_assert(void); |
| if (!cond) _compile_time_assert(); |
| } |
| #endif /* PIPE_GENERATION */ |
| |
| #endif /* __ASSERT_SUPPORT_H_INCLUDED__ */ |