| /* printk.h - low-level debug output */ |
| |
| /* |
| * Copyright (c) 2010-2012, 2014 Wind River Systems, Inc. |
| * |
| * 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. |
| */ |
| #ifndef _PRINTK_H_ |
| #define _PRINTK_H_ |
| |
| #include <toolchain.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * |
| * @brief Print kernel debugging message. |
| * |
| * This routine prints a kernel debugging message to the system console. |
| * Output is send immediately, without any mutual exclusion or buffering. |
| * |
| * A basic set of conversion specifier characters are supported: |
| * - signed decimal: \%d, \%i |
| * - unsigned decimal: \%u |
| * - unsigned hexadecimal: \%x (\%X is treated as \%x) |
| * - pointer: \%p |
| * - string: \%s |
| * - character: \%c |
| * - percent: \%\% |
| * |
| * No other conversion specification capabilities are supported, such as flags, |
| * field width, precision, or length attributes. |
| * |
| * @param fmt Format string. |
| * @param ... Optional list of format arguments. |
| * |
| * @return N/A |
| */ |
| #ifdef CONFIG_PRINTK |
| extern void printk(const char *fmt, ...); |
| #else |
| static inline void printk(const char *fmt, ...) |
| { |
| ARG_UNUSED(fmt); |
| } |
| #endif |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif |