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Diffstat (limited to 'apps/system/usbmonitor/usbmonitor.c')
-rw-r--r-- | apps/system/usbmonitor/usbmonitor.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/apps/system/usbmonitor/usbmonitor.c b/apps/system/usbmonitor/usbmonitor.c new file mode 100644 index 000000000..b101b128c --- /dev/null +++ b/apps/system/usbmonitor/usbmonitor.c @@ -0,0 +1,162 @@ +/**************************************************************************** + * apps/system/free/free.c + * + * Copyright (C) 2013 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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 NuttX 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 + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <nuttx/progmem.h> + +#include <stdio.h> +#include <stdlib.h> + +/**************************************************************************** + * Private Typs + ****************************************************************************/ + +struct usbmon_state_s +{ +#ifdef CONFIG_NSH_BUILTIN_APPS + volatile bool started; + volatile bool stop; + pid_t pid; +#endif +}; + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +static struct usbmon_state_s g_usbmonitor; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +static int usbmonitor_daemon(int argc, char **argv) +{ +#ifdef CONFIG_NSH_BUILTIN_APPS + print("USB Monitor running: %d\n", g_usbmonitor.pid); +#endif + +#ifdef CONFIG_NSH_BUILTIN_APPS + /* If we are running as an NSH command, then loop until we detect that + * there is a request to stop. + */ + + while (!g_usbmonitor.stop) +#else + /* If we are running as a standalone program, then loop forever */ + + for (;;) +#endif + { +#warning "Missing logic" + } + + /* Stopped */ + +#ifdef CONFIG_NSH_BUILTIN_APPS + g_usbmonitor.stop = false; + g_usbmonitor.started = false; + print("USB Monitor stopped: %d\n", g_usbmonitor.pid); +#endif + return 0; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +int usbmonitor_main(int argc, char **argv) +{ +#ifdef CONFIG_NSH_BUILTIN_APPS + /* Has the monitor already started? */ + + sched_lock(); + if (!g_usbmonitor.started) + { + int ret; + + /* No.. start it now */ + + g_usbmonitor.started = true; + g_usbmonitor.stop = false; + + ret = TASK_CREATE("USB Monitor", CONFIG_SYSTEM_USBMONITOR_PRIORITY, + CONFIG_SYSTEM_USBMONITOR_STACKSIZE, + (main_t)usbmonitor_daemon, (const char **)NULL); + if (ret < 0) + { + int errcode = errno; + fprintf(stderr, "ERROR: Failed to start the USB monitor: %d\n", + errcode); + } + else + { + g_usbmonitor.pid = ret; + print("USB Monitor started: %d\n", g_usbmonitor.pid); + } + + sched_unlock(); + return 0; + } + + sched_unlock(); + print("USB Monitor running: %d\n", g_usbmonitor.pid); + return 0; +#else + return usbmonitor_daemon(argc, argv); +#endif +} + +#ifdef CONFIG_NSH_BUILTIN_APPS +int usbmonitor_stop(int argc, char **argv) +{ + /* Has the monitor already started? */ + + if (g_usbmonitor.started) + { + print("USB Monitor stopping: %d\n", g_usbmonitor.pid); + g_usbmonitor.stop = true; + return 0; + } + + print("USB Monitor stopped: %d\n", g_usbmonitor.pid); + return 0; +} +#endif + |