06d83c6261
Atmel toolchain AVR compiler provides a transparent in-flash object support using __flash and __memx symbols. The former indicates to compiler that this is a flash-based object. The later used with pointer indicates that the referenced object may reside either in flash or in RAM. The compiler automatically makes 32-bit pointer with flag indicating whether referenced object is in flash or RAM and generates code to access either in run-time. Thus, any function that accepts __memx object can transparently work with RAM and flash objects. For platforms with a Harvard architecture and a very small RAM like AVR this allows to move all constant strings used in trace messages to flash in the instruction address space, releasing resources for other things. This change introduces IOBJ and IPTR type qualifiers. The 'I' indicates that the object may like in instruction space on a Harvard architecture machine. For platforms that do not have __flash and __memx or similar symbols IOBJ and IPTR are empty, making the types equivalent to, for example, 'const char' and 'const char*'. For Atmel compiler these will become 'const __flash char' and 'const __memx char*'. All printf() functions and syslog() functions are changed so that the qualifier is used with the format parameter. From: Dimitry Kloper <dikloper@cisco.com>
172 lines
6.3 KiB
C
172 lines
6.3 KiB
C
/****************************************************************************
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* lib/syslog/lib_lowsyslog.c
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*
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* Copyright (C) 2007-2009, 2011-2012 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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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <syslog.h>
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#include <nuttx/streams.h>
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#include "syslog/syslog.h"
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#if defined(CONFIG_ARCH_LOWPUTC) || defined(CONFIG_SYSLOG)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Type Declarations
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Public Constant Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Constant Data
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: lowvsyslog_internal
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*
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* Description:
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* This is the internal implementation of lowvsyslog (see the description
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* of lowsyslog and lowvsyslog below)
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*
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****************************************************************************/
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static inline int lowvsyslog_internal(FAR const IPTR char *fmt, va_list ap)
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{
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struct lib_outstream_s stream;
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/* Wrap the stdout in a stream object and let lib_vsprintf do the work. */
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#ifdef CONFIG_SYSLOG
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lib_syslogstream((FAR struct lib_outstream_s *)&stream);
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#else
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lib_lowoutstream((FAR struct lib_outstream_s *)&stream);
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#endif
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return lib_vsprintf((FAR struct lib_outstream_s *)&stream, fmt, ap);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: lowvsyslog
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*
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* Description:
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* The function lowvsyslog() performs the same task as lowsyslog() with
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* the difference that it takes a set of arguments which have been
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* obtained using the stdarg variable argument list macros.
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*
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****************************************************************************/
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int lowvsyslog(int priority, FAR const IPTR char *fmt, va_list ap)
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{
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int ret = 0;
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/* Check if this priority is enabled */
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if ((g_syslog_mask & LOG_MASK(priority)) != 0)
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{
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/* Yes.. let vsylog_internal to the deed */
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ret = lowvsyslog_internal(fmt, ap);
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}
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return ret;
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}
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/****************************************************************************
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* Name: lowsyslog
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*
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* Description:
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* syslog() generates a log message. The priority argument is formed by
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* ORing the facility and the level values (see include/syslog.h). The
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* remaining arguments are a format, as in printf and any arguments to the
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* format.
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*
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* This is a non-standard, low-level system logging interface. The
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* difference between syslog() and lowsyslog() is that the syslog()
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* interface writes to the syslog device (usually fd=1, stdout) whereas
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* lowsyslog() uses a lower level interface that works even from interrupt
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* handlers.
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*
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****************************************************************************/
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int lowsyslog(int priority, FAR const IPTR char *fmt, ...)
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{
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va_list ap;
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int ret;
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/* Let lowvsyslog do the work */
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va_start(ap, fmt);
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ret = lowvsyslog(priority, fmt, ap);
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va_end(ap);
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return ret;
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}
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#endif /* CONFIG_ARCH_LOWPUTC || CONFIG_SYSLOG */
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