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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

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@58 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2007-03-11 22:19:01 +00:00
parent 38c48d998a
commit d2b2a82171
9 changed files with 629 additions and 354 deletions
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sched/task_init.c
+38 -17
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@@ -37,6 +37,7 @@
* Included Files
************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sched.h>
#include <nuttx/arch.h>
@@ -74,22 +75,31 @@
* Name: task_init
*
* Description:
* This is a wrapper around the internal _task_init() that
* provides a VxWorks-like API. See _task_init() for
* further information.
* 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
* stack - Start of the pre-allocated stack
* stack_size - Size (in bytes) of the stack allocated
* entry - Application start point of the new task
* arg1-4 - Four required task arguments to pass to
* the task when it is started.
* 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:
* see _task_init()
* OK on success; ERROR on failure. (See task_schedsetup()
* for possible failure conditions).
*
************************************************************/
@@ -97,16 +107,27 @@
STATUS task_init(FAR _TCB *tcb, const char *name, int priority,
FAR uint32 *stack, uint32 stack_size,
main_t entry, char *argv[])
{
up_use_stack(tcb, stack, stack_size);
return _task_init(tcb, name, priority, task_start, entry,
FALSE, argv);
}
#else
STATUS task_init(FAR _TCB *tcb, const char *name, int priority,
main_t entry, char *argv[])
{
return _task_init(tcb, name, priority, task_start, entry,
FALSE, 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, FALSE, argv);
}
return ret;
}