Divided _task_init() in several smaller functions that take fewer paramters. This was necessary to reduce the stack usage for the 8051/2 which has a tiny, 256 byte stack

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@58 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 113 insertions, 0 deletions

diff --git a/nuttx/sched/task_start.c b/nuttx/sched/task_start.c
new file mode 100644
index 000000000..9e2a013bf
--- /dev/null
+++ b/nuttx/sched/task_start.c
@@ -0,0 +1,113 @@
+/************************************************************
+ * task_start.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 <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));
+}