131 lines
4.1 KiB
C
131 lines
4.1 KiB
C
/****************************************************************************
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* drivers/syslog/syslog_write.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <sys/types.h>
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#include <nuttx/arch.h>
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#include <nuttx/sched.h>
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#include <nuttx/syslog/syslog.h>
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#include "syslog.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: syslog_default_write
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*
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* Description:
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* This provides a default write method for syslog devices that do not
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* support multiple byte writes This functions simply loops, outputting
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* one character at a time.
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*
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* Input Parameters:
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* buffer - The buffer containing the data to be output
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* buflen - The number of bytes in the buffer
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*
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* Returned Value:
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* On success, the number of characters written is returned. A negated
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* errno value is returned on any failure.
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*
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****************************************************************************/
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static ssize_t syslog_default_write(FAR const char *buffer, size_t buflen)
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{
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size_t nwritten;
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if (up_interrupt_context() || sched_idletask())
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{
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for (nwritten = 0; nwritten < buflen; nwritten++)
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{
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#ifdef CONFIG_SYSLOG_INTBUFFER
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if (up_interrupt_context())
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{
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syslog_add_intbuffer(*buffer++);
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}
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else
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#endif
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{
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DEBUGASSERT(g_syslog_channel->sc_force != NULL);
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g_syslog_channel->sc_force(*buffer++);
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}
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}
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}
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#ifdef CONFIG_SYSLOG_WRITE
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else if (g_syslog_channel->sc_write)
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{
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nwritten = g_syslog_channel->sc_write(buffer, buflen);
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}
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#endif
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else
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{
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for (nwritten = 0; nwritten < buflen; nwritten++)
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{
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DEBUGASSERT(g_syslog_channel->sc_putc != NULL);
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g_syslog_channel->sc_putc(*buffer++);
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}
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}
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return nwritten;
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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: syslog_write
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*
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* Description:
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* This is the low-level, multiple character, system logging interface.
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*
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* Input Parameters:
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* buffer - The buffer containing the data to be output
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* buflen - The number of bytes in the buffer
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*
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* Returned Value:
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* On success, the number of characters written is returned. A negated
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* errno value is returned on any failure.
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*
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****************************************************************************/
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ssize_t syslog_write(FAR const char *buffer, size_t buflen)
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{
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#ifdef CONFIG_SYSLOG_INTBUFFER
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if (!up_interrupt_context() && !sched_idletask())
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{
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/* Flush any characters that may have been added to the interrupt
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* buffer.
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*/
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syslog_flush_intbuffer(g_syslog_channel, false);
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}
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#endif
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return syslog_default_write(buffer, buflen);
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}
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