73 lines
1.8 KiB
C
73 lines
1.8 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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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_INCLUDE_SYS_PRINTK_H_
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#define ZEPHYR_INCLUDE_SYS_PRINTK_H_
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#include <toolchain.h>
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#include <stddef.h>
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#include <stdarg.h>
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#include <inttypes.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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* Field width (with or without leading zeroes) is supported.
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* Length attributes h, hh, l, ll and z are supported. However, integral
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* values with %lld and %lli are only printed if they fit in a long
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* otherwise 'ERR' is printed. Full 64-bit values may be printed with %llx.
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* Flags and precision attributes are not supported.
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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 __printf_like(1, 2) void printk(const char *fmt, ...);
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extern __printf_like(1, 0) void vprintk(const char *fmt, va_list ap);
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#else
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static inline __printf_like(1, 2) void printk(const char *fmt, ...)
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{
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ARG_UNUSED(fmt);
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}
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static inline __printf_like(1, 0) void vprintk(const char *fmt, va_list ap)
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{
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ARG_UNUSED(fmt);
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ARG_UNUSED(ap);
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}
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#endif
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extern __printf_like(3, 4) int snprintk(char *str, size_t size,
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const char *fmt, ...);
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extern __printf_like(3, 0) int vsnprintk(char *str, size_t size,
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const char *fmt, va_list ap);
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#ifdef __cplusplus
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}
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#endif
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#endif
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