94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/****************************************************************************
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* drivers/syslog/syslog_flush.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 <stdbool.h>
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#include <assert.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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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: syslog_flush
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*
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* Description:
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* This is called by system crash-handling logic. It must flush any
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* buffered data to the SYSLOG device.
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*
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* Interrupts are disabled at the time of the crash and this logic must
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* perform the flush using low-level, non-interrupt driven logic.
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*
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* REVISIT: There is an implementation problem in that if a character
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* driver is the underlying device, then there is no mechanism to flush
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* the data buffered in the driver with interrupts disabled.
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*
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* Currently, this function on (a) dumps the interrupt buffer (if the
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* SYSLOG interrupt buffer is enabled), and (b) only the SYSLOG interface
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* supports supports the 'sc_force()' method.
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*
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* Input Parameters:
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* ch - The character to add to the SYSLOG (must be positive).
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*
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* Returned Value:
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* Zero (OK)is returned on success. A negated errno value is returned
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* on any failure.
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*
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****************************************************************************/
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int syslog_flush(void)
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{
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int i;
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#ifdef CONFIG_SYSLOG_INTBUFFER
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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(true);
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#endif
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for (i = 0; i < CONFIG_SYSLOG_MAX_CHANNELS; i++)
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{
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if (g_syslog_channel[i] == NULL)
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{
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break;
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}
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/* Then flush all of the buffered output to the SYSLOG device */
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if (g_syslog_channel[i]->sc_ops->sc_flush != NULL)
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{
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g_syslog_channel[i]->sc_ops->sc_flush(g_syslog_channel[i]);
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}
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}
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return OK;
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}
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