8f7e5ad85e
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@60 42af7a65-404d-4744-a932-0658087f49c3
134 lines
5.0 KiB
C
134 lines
5.0 KiB
C
/************************************************************
|
|
* task_init.c
|
|
*
|
|
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
*
|
|
* 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 Gregory Nutt 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 <sys/types.h>
|
|
#include <sched.h>
|
|
#include <nuttx/arch.h>
|
|
#include "os_internal.h"
|
|
|
|
/************************************************************
|
|
* Definitions
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Private Type Declarations
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Global Variables
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Private Variables
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Private Function Prototypes
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Private Functions
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Public Functions
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Name: task_init
|
|
*
|
|
* Description:
|
|
* This function initializes a Task Control Block (TCB)
|
|
* in preparation for starting a new thread. It performs a
|
|
* subset of the functionality of task_create()
|
|
*
|
|
* Unlike task_create(), task_init() does not activate the
|
|
* task. This must be done by calling task_activate().
|
|
*
|
|
* Input Parameters:
|
|
* tcb - Address of the new task's TCB
|
|
* name - Name of the new task (not used)
|
|
* priority - Priority of the new task
|
|
* stack - Start of the pre-allocated stack
|
|
* stack_size - Size (in bytes) of the stack allocated
|
|
* entry - Application start point of the new task
|
|
* arg - A pointer to an array of input parameters.
|
|
* Up to CONFIG_MAX_TASK_ARG parameters may
|
|
* be provided. If fewer than CONFIG_MAX_TASK_ARG
|
|
* parameters are passed, the list should be
|
|
* terminated with a NULL argv[] value.
|
|
* If no parameters are required, argv may be
|
|
* NULL.
|
|
*
|
|
* Return Value:
|
|
* OK on success; ERROR on failure. (See task_schedsetup()
|
|
* for possible failure conditions).
|
|
*
|
|
************************************************************/
|
|
|
|
#ifndef CONFIG_CUSTOM_STACK
|
|
STATUS task_init(FAR _TCB *tcb, const char *name, int priority,
|
|
FAR uint32 *stack, uint32 stack_size,
|
|
main_t entry, char *argv[])
|
|
#else
|
|
STATUS task_init(FAR _TCB *tcb, const char *name, int priority,
|
|
main_t entry, char *argv[])
|
|
#endif
|
|
{
|
|
STATUS ret;
|
|
|
|
/* Configure the user provided stack region */
|
|
|
|
#ifndef CONFIG_CUSTOM_STACK
|
|
up_use_stack(tcb, stack, stack_size);
|
|
#endif
|
|
|
|
/* Initialize the task control block */
|
|
|
|
ret = task_schedsetup(tcb, priority, task_start, entry);
|
|
if (ret == OK)
|
|
{
|
|
/* Setup to pass parameters to the new task */
|
|
|
|
(void)task_argsetup(tcb, name, argv);
|
|
}
|
|
return ret;
|
|
}
|