91 lines
3.5 KiB
C
91 lines
3.5 KiB
C
/****************************************************************************
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* arch/avr/include/debug.h
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_ARCH_AVR_DEBUG_H
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#define __INCLUDE_ARCH_AVR_DEBUG_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/compiler.h>
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#include <syslog.h>
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#ifdef CONFIG_AVR_HAS_MEMX_PTR
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Since format string that is passed to __arch_syslog() can be a
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* comma-separated list, we need some cpp trickery to handle it
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*
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* __dbg_first() helper macro accepts the format (that is potentially
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* a comma-separated) and substitutes to its first element.
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*
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* __dbg_subst() helper macro substitutes first element in the format
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* with prefix.
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*/
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#define __dbg_first(format, ...) format
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#define __dbg_subst(prefix, format, ...) prefix, ##__VA_ARGS__
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#define __dbg_expand(logger, prio, format, ...) \
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do \
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{ \
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static const IOBJ char dbg_s[] = __dbg_first(format); \
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logger(prio, __dbg_subst(dbg_s, format), ##__VA_ARGS__); \
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} \
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while(0)
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/* __arch_syslog() and __arch_lowsyslog() override behavior of NuttX
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* dbg macros. They put the format string into program memory and
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* utilize IPTR (__memx) parameter of syslog to take the format
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* directly from program memory. This reduces amount of RAM held by
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* the format strings used in debug statements.
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*/
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#define __arch_syslog(...) \
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__dbg_expand(syslog, ##__VA_ARGS__)
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#define __arch_lowsyslog(...) \
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__dbg_expand(lowsyslog, ##__VA_ARGS__)
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#endif /* CONFIG_AVR_HAS_MEMX_PTR */
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#endif /* __INCLUDE_ARCH_DEBUG_H */
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