e26439df4d
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5577 42af7a65-404d-4744-a932-0658087f49c3
163 lines
4.8 KiB
C
163 lines
4.8 KiB
C
/****************************************************************************
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* apps/system/free/free.c
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 <nuttx/progmem.h>
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#include <stdio.h>
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#include <stdlib.h>
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/****************************************************************************
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* Private Typs
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****************************************************************************/
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struct usbmon_state_s
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{
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#ifdef CONFIG_NSH_BUILTIN_APPS
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volatile bool started;
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volatile bool stop;
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pid_t pid;
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#endif
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};
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static struct usbmon_state_s g_usbmonitor;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static int usbmonitor_daemon(int argc, char **argv)
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{
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#ifdef CONFIG_NSH_BUILTIN_APPS
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print("USB Monitor running: %d\n", g_usbmonitor.pid);
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#endif
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#ifdef CONFIG_NSH_BUILTIN_APPS
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/* If we are running as an NSH command, then loop until we detect that
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* there is a request to stop.
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*/
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while (!g_usbmonitor.stop)
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#else
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/* If we are running as a standalone program, then loop forever */
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for (;;)
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#endif
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{
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#warning "Missing logic"
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}
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/* Stopped */
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#ifdef CONFIG_NSH_BUILTIN_APPS
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g_usbmonitor.stop = false;
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g_usbmonitor.started = false;
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print("USB Monitor stopped: %d\n", g_usbmonitor.pid);
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#endif
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return 0;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int usbmonitor_main(int argc, char **argv)
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{
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#ifdef CONFIG_NSH_BUILTIN_APPS
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/* Has the monitor already started? */
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sched_lock();
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if (!g_usbmonitor.started)
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{
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int ret;
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/* No.. start it now */
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g_usbmonitor.started = true;
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g_usbmonitor.stop = false;
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ret = TASK_CREATE("USB Monitor", CONFIG_SYSTEM_USBMONITOR_PRIORITY,
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CONFIG_SYSTEM_USBMONITOR_STACKSIZE,
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(main_t)usbmonitor_daemon, (const char **)NULL);
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if (ret < 0)
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{
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int errcode = errno;
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fprintf(stderr, "ERROR: Failed to start the USB monitor: %d\n",
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errcode);
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}
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else
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{
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g_usbmonitor.pid = ret;
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print("USB Monitor started: %d\n", g_usbmonitor.pid);
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}
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sched_unlock();
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return 0;
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}
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sched_unlock();
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print("USB Monitor running: %d\n", g_usbmonitor.pid);
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return 0;
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#else
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return usbmonitor_daemon(argc, argv);
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#endif
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}
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#ifdef CONFIG_NSH_BUILTIN_APPS
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int usbmonitor_stop(int argc, char **argv)
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{
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/* Has the monitor already started? */
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if (g_usbmonitor.started)
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{
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print("USB Monitor stopping: %d\n", g_usbmonitor.pid);
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g_usbmonitor.stop = true;
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return 0;
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}
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print("USB Monitor stopped: %d\n", g_usbmonitor.pid);
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return 0;
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}
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#endif
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