diff options
Diffstat (limited to 'nuttx/sched/task_start.c')
-rw-r--r-- | nuttx/sched/task_start.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/nuttx/sched/task_start.c b/nuttx/sched/task_start.c new file mode 100644 index 000000000..a9cc38dfc --- /dev/null +++ b/nuttx/sched/task_start.c @@ -0,0 +1,114 @@ +/**************************************************************************** + * sched/task_start.c + * + * Copyright (C) 2007-2010 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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 NuttX 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 <stdlib.h> +#include <sched.h> +#include <debug.h> + +#include "os_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Type Declarations + ****************************************************************************/ + +/**************************************************************************** + * Global Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: task_start + * + * Description: + * This function is the low level entry point into the main thread of + * execution of a task. It receives initial control when the task is + * started and calls main entry point of the newly started task. + * + * Inputs: + * None + * + * Return: + * None + * + ****************************************************************************/ + +void task_start(void) +{ + FAR _TCB *tcb = (FAR _TCB*)g_readytorun.head; + int argc; + + /* Count how many non-null arguments we are passing */ + + for (argc = 1; argc <= CONFIG_MAX_TASK_ARGS; argc++) + { + /* The first non-null argument terminates the list */ + + if (!tcb->argv[argc]) + { + break; + } + } + + /* Call the 'main' entry point passing argc and argv. If/when + * the task returns. + */ + + exit(tcb->entry.main(argc, tcb->argv)); +} |