/****************************************************************************
* examples/thttpd/tasks/tasks.c
*
* Copyright (C) 2009, 2011, 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 <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sched.h>
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static const char *g_statenames[] =
{
"INVALID ",
"PENDING ",
"READY ",
"RUNNING ",
"INACTIVE",
"WAITSEM ",
#ifndef CONFIG_DISABLE_MQUEUE
"WAITSIG ",
#endif
#ifndef CONFIG_DISABLE_MQUEUE
"MQNEMPTY",
"MQNFULL "
#endif
};
static const char *g_ttypenames[4] =
{
"TASK ",
"PTHREAD",
"KTHREAD",
"--?-- "
};
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/* NOTEs:
*
* 1. One limitation in the use of NXFLAT is that functions that are
* referenced as a pointer-to-a-function must have global scope. Otherwise
* ARM GCC will generate some bad logic.
* 2. In general, when called back, there is no guarantee to that PIC registers
* will be valid and, unless you take special precautions, it could be
* dangerous to reference global variables in the callback function.
*/
/* static */ void show_task(FAR struct tcb_s *tcb, FAR void *arg)
{
int i;
/* Show task/thread status */
printf("%5d %3d %4s %7s%c%c %8s ",
tcb->pid, tcb->sched_priority,
tcb->flags & TCB_FLAG_ROUND_ROBIN ? "RR " : "FIFO",
g_ttypenames[(tcb->flags & TCB_FLAG_TTYPE_MASK) >> TCB_FLAG_TTYPE_SHIFT],
tcb->flags & TCB_FLAG_NONCANCELABLE ? 'N' : ' ',
tcb->flags & TCB_FLAG_CANCEL_PENDING ? 'P' : ' ',
g_statenames[tcb->task_state]);
/* Is this a task or a thread? */
#ifndef CONFIG_DISABLE_PTHREAD
if ((tcb->flags & TCB_FLAG_TTYPE_MASK) == TCB_FLAG_TTYPE_PTHREAD)
{
FAR struct pthread_tcb_s *ptcb = (FAR struct pthread_tcb_s *)tcb;
/* It is a pthread. Show any name assigned to the pthread via prtcl() along
* with the startup value.
*/
#if CONFIG_TASK_NAME_SIZE > 0
printf("%s(%p)\n", tcb->name, ptcb->arg);
#else
printf("pthread(%p)\n", ptcb->arg);
#endif
}
else
#endif
{
FAR struct task_tcb_s *ttcb = (FAR struct task_tcb_s *)tcb;
/* Show task name and arguments */
printf("%s(", ttcb->argv[0]);
/* Special case 1st argument (no comma) */
if (ttcb->argv[1])
{
printf("%p", ttcb->argv[1]);
}
/* Then any additional arguments */
#if CONFIG_MAX_TASK_ARGS > 2
for (i = 2; i <= CONFIG_MAX_TASK_ARGS && ttcb->argv[i]; i++)
{
printf(", %p", ttcb->argv[i]);
}
#endif
printf(")\n");
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
int main(int argc, char *argv[])
{
puts(
"Content-type: text/html\r\n"
"Status: 200/html\r\n"
"\r\n"
"<html>\r\n"
"<head>\r\n"
"<title>NuttX Tasks</title>\r\n"
"<link rel=\"stylesheet\" type=\"text/css\" href=\"/style.css\">\r\n"
"</head>\r\n"
"<body bgcolor=\"#fffeec\" text=\"black\">\r\n"
"<div class=\"menu\">\r\n"
"<div class=\"menubox\"><a href=\"/index.html\">Front page</a></div>\r\n"
"<div class=\"menubox\"><a href=\"hello\">Say Hello</a></div>\r\n"
"<div class=\"menubox\"><a href=\"tasks\">Tasks</a></div>\r\n"
"<div class=\"menubox\"><a href=\"netstat\">Network status</a></div>\r\n"
"<br>\r\n"
"</div>\r\n"
"<div class=\"contentblock\">\r\n"
"<pre>\r\n"
"PID PRI SCHD TYPE NP STATE NAME\r\n");
sched_foreach(show_task, NULL);
puts(
"</pre>\r\n"
"</body>\r\n"
"</html>\r\n");
return 0;
}
