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/* printk.h - low-level debug output */ /* * Copyright (c) 2010-2012, 2014 Wind River Systems, Inc. * * SPDX-License-Identifier: Apache-2.0 */ #ifndef ZEPHYR_INCLUDE_SYS_PRINTK_H_ #define ZEPHYR_INCLUDE_SYS_PRINTK_H_ #include <toolchain.h> #include <stddef.h> #include <stdarg.h> #include <inttypes.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: \%\% * * Field width (with or without leading zeroes) is supported. * Length attributes h, hh, l, ll and z are supported. However, integral * values with %lld and %lli are only printed if they fit in a long * otherwise 'ERR' is printed. Full 64-bit values may be printed with %llx. * Flags and precision attributes are not supported. * * @param fmt Format string. * @param ... Optional list of format arguments. * * @return N/A */ #ifdef CONFIG_PRINTK extern __printf_like(1, 2) void printk(const char *fmt, ...); extern __printf_like(1, 0) void vprintk(const char *fmt, va_list ap); extern __printf_like(3, 4) int snprintk(char *str, size_t size, const char *fmt, ...); extern __printf_like(3, 0) int vsnprintk(char *str, size_t size, const char *fmt, va_list ap); extern __printf_like(3, 0) void z_vprintk(int (*out)(int f, void *c), void *ctx, const char *fmt, va_list ap); #else static inline __printf_like(1, 2) void printk(const char *fmt, ...) { ARG_UNUSED(fmt); } static inline __printf_like(1, 0) void vprintk(const char *fmt, va_list ap) { ARG_UNUSED(fmt); ARG_UNUSED(ap); } static inline __printf_like(3, 4) int snprintk(char *str, size_t size, const char *fmt, ...) { ARG_UNUSED(str); ARG_UNUSED(size); ARG_UNUSED(fmt); return 0; } static inline __printf_like(3, 0) int vsnprintk(char *str, size_t size, const char *fmt, va_list ap) { ARG_UNUSED(str); ARG_UNUSED(size); ARG_UNUSED(fmt); ARG_UNUSED(ap); return 0; } #endif #ifdef __cplusplus } #endif #endif |