rt-thread/components/utilities/logtrace/memlog.c

/*
 * File      : memlog.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2013, RT-Thread Development Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2013-06-26     Grissiom     the first version
 */

#include <rtthread.h>
#include <rtdevice.h>
#include <log_trace.h>

#define PIPE_SZ    2048
#define PIPE_NAME  "memlog"

static rt_pipe_t *_log_pipe = NULL;
static rt_uint8_t outbuf[1024];
void memlog_flush(void)
{
    rt_size_t readsz;
    rt_device_t console;

    console = rt_console_get_device();
    if (!console) return;

    readsz = rt_device_read((rt_device_t)&(_log_pipe->parent), 0, outbuf, sizeof(outbuf));
    if (readsz)
        rt_device_write(console, 0, outbuf, readsz);
}

int memlog_init(void)
{
    _log_pipe = rt_pipe_create(PIPE_NAME, PIPE_SZ);
    if (_log_pipe == RT_NULL)
    {
        rt_kprintf("init pipe device failed.\n");
        return -1;
    }

    log_trace_set_device(PIPE_NAME);
    rt_thread_idle_sethook(memlog_flush);
    
    return 0;
}
INIT_APP_EXPORT(memlog_init);