hello_start_qurt.cpp

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/****************************************************************************
 *
 *   Copyright (C) 2015 Mark Charlebois. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name PX4 nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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/**
 * @file hello_start_linux.cpp
 *
 * @author Thomas Gubler <thomasgubler@gmail.com>
 * @author Mark Charlebois <mcharleb@gmail.com>
 */
#include "hello_example.h"
#include <px4_platform_common/log.h>
#include <px4_platform_common/app.h>
#include <px4_platform_common/tasks.h>
#include <stdio.h>
#include <string.h>
#include <sched.h>

static int daemon_task;             /* Handle of deamon task / thread */

//using namespace px4;

extern "C" __EXPORT int hello_main(int argc, char *argv[]);

static void usage()
{
    PX4_DEBUG("usage: hello {start|stop|status}");
}
int hello_main(int argc, char *argv[])
{
    if (argc < 2) {
        usage();
        return 1;
    }

    if (!strcmp(argv[1], "start")) {

        if (HelloExample::appState.isRunning()) {
            PX4_DEBUG("already running");
            /* this is not an error */
            return 0;
        }

        daemon_task = px4_task_spawn_cmd("hello",
                         SCHED_DEFAULT,
                         SCHED_PRIORITY_MAX - 5,
                         16000,
                         PX4_MAIN,
                         (char *const *)argv);

        return 0;
    }

    if (!strcmp(argv[1], "stop")) {
        HelloExample::appState.requestExit();
        return 0;
    }

    if (!strcmp(argv[1], "status")) {
        if (HelloExample::appState.isRunning()) {
            PX4_DEBUG("is running");

        } else {
            PX4_DEBUG("not started");
        }

        return 0;
    }

    usage();
    return 1;
}