151dfee1f9
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5571 42af7a65-404d-4744-a932-0658087f49c3
124 lines
4.4 KiB
C
124 lines
4.4 KiB
C
/****************************************************************************
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* sched/task_start.c
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*
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* Copyright (C) 2007-2010 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 <stdlib.h>
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#include <sched.h>
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#include <debug.h>
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#include "os_internal.h"
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Type Declarations
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****************************************************************************/
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/****************************************************************************
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* Global Variables
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****************************************************************************/
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: task_start
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*
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* Description:
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* This function is the low level entry point into the main thread of
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* execution of a task. It receives initial control when the task is
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* started and calls main entry point of the newly started task.
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*
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* Inputs:
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* None
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*
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* Return:
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* None
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*
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****************************************************************************/
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void task_start(void)
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{
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FAR _TCB *tcb = (FAR _TCB*)g_readytorun.head;
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int argc;
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/* Execute the start hook if one has been registered */
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#ifdef CONFIG_SCHED_STARTHOOK
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if (tcb->starthook)
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{
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tcb->starthook(tcb->starthookarg);
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}
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#endif
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/* Count how many non-null arguments we are passing */
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for (argc = 1; argc <= CONFIG_MAX_TASK_ARGS; argc++)
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{
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/* The first non-null argument terminates the list */
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if (!tcb->argv[argc])
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{
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break;
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}
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}
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/* Call the 'main' entry point passing argc and argv. If/when
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* the task returns.
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*/
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exit(tcb->entry.main(argc, tcb->argv));
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}
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