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123 lines
4.4 KiB
123 lines
4.4 KiB
/**************************************************************************** |
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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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