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