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/************************************************************
* 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, const char *argv[])
#else
STATUS task_init(FAR _TCB *tcb, const char *name, int priority,
main_t entry, const 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;
}
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