OVMS3/OVMS.V3/main/log_buffers.cpp

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/*
; Project: Open Vehicle Monitor System
; Date: 14th March 2017
;
; Changes:
; 1.0 Initial release
;
; (C) 2011 Michael Stegen / Stegen Electronics
; (C) 2011-2017 Mark Webb-Johnson
; (C) 2011 Sonny Chen @ EPRO/DX
;
; Permission is hereby granted, free of charge, to any person obtaining a copy
; of this software and associated documentation files (the "Software"), to deal
; in the Software without restriction, including without limitation the rights
; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
; copies of the Software, and to permit persons to whom the Software is
; furnished to do so, subject to the following conditions:
;
; The above copyright notice and this permission notice shall be included in
; all copies or substantial portions of the Software.
;
; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
; THE SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ovms_log.h>
#include "log_buffers.h"
LogBuffers::LogBuffers() : m_refcount(0)
{
}
LogBuffers::~LogBuffers()
{
// Free all the buffers in the list.
for (iterator itr = begin(); itr != end(); ++itr)
{
free(*itr);
}
}
int LogBuffers::append(const char* fmt, va_list args)
{
char *buffer;
int ret = vasprintf(&buffer, fmt, args);
if (ret >= 0)
append(buffer);
return ret;
}
void LogBuffers::append(char* buffer)
{
if (empty())
{
push_front(buffer);
}
else
{
iterator before = begin(), after;
while (true)
{
after = before;
++after;
if (after == end())
break;
before = after;
}
insert_after(before, buffer);
}
}
void LogBuffers::set(int count)
{
m_refcount = count;
}
void LogBuffers::release()
{
int before = std::atomic_fetch_add(&m_refcount, -1);
if (before == 1)
delete this;
}
bool LogBuffers::last()
{
return m_refcount == 1;
}