65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/* printk.h - low-level debug output */
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/*
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* Copyright (c) 2010-2012, 2014 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _PRINTK_H_
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#define _PRINTK_H_
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#include <toolchain.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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*
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* @brief Print kernel debugging message.
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*
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* This routine prints a kernel debugging message to the system console.
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* Output is send immediately, without any mutual exclusion or buffering.
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*
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* A basic set of conversion specifier characters are supported:
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* - signed decimal: \%d, \%i
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* - unsigned decimal: \%u
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* - unsigned hexadecimal: \%x (\%X is treated as \%x)
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* - pointer: \%p
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* - string: \%s
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* - character: \%c
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* - percent: \%\%
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*
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* No other conversion specification capabilities are supported, such as flags,
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* field width, precision, or length attributes.
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*
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* @param fmt Format string.
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* @param ... Optional list of format arguments.
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*
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* @return N/A
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*/
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#ifdef CONFIG_PRINTK
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extern void printk(const char *fmt, ...);
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#else
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static inline void printk(const char *fmt, ...)
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{
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ARG_UNUSED(fmt);
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}
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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