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support maximal priority level is 8. 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@568 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong 2010-03-31 23:21:02 +00:00
parent cb92e84504
commit f0d78afbf2
1 changed files with 18 additions and 10 deletions
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28
src/scheduler.c
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@ -148,16 +148,19 @@ void rt_system_scheduler_init(void)
} }
/** /**
* @ingroup SystemInit
* This function will startup scheduler. It will select one thread * This function will startup scheduler. It will select one thread
* with the highest priority level, then switch to it. * with the highest priority level, then switch to it.
*/ */
void rt_system_scheduler_start() void rt_system_scheduler_start()
{ {
register rt_uint8_t number; register struct rt_thread *to_thread;
register rt_uint8_t highest_ready_priority; register rt_ubase_t highest_ready_priority;
struct rt_thread *to_thread;
#if RT_THREAD_PRIORITY_MAX == 8
highest_ready_priority = rt_lowest_bitmap[rt_thread_ready_priority_group];
#else
register rt_ubase_t number;
/* find out the highest priority task */ /* find out the highest priority task */
if (rt_thread_ready_priority_group & 0xff) if (rt_thread_ready_priority_group & 0xff)
{ {
@ -180,6 +183,7 @@ void rt_system_scheduler_start()
highest_ready_priority = (number << 3) + rt_lowest_bitmap[rt_thread_ready_table[number]]; highest_ready_priority = (number << 3) + rt_lowest_bitmap[rt_thread_ready_table[number]];
#else #else
highest_ready_priority = number; highest_ready_priority = number;
#endif
#endif #endif
/* get switch to thread */ /* get switch to thread */
@ -205,10 +209,7 @@ void rt_system_scheduler_start()
*/ */
void rt_schedule() void rt_schedule()
{ {
register rt_uint8_t number; rt_base_t level;
register rt_base_t level;
register rt_uint8_t highest_ready_priority;
struct rt_thread *to_thread; struct rt_thread *to_thread;
struct rt_thread *from_thread; struct rt_thread *from_thread;
@ -218,6 +219,12 @@ void rt_schedule()
/* check the scheduler is enabled or not */ /* check the scheduler is enabled or not */
if (rt_scheduler_lock_nest == 0) if (rt_scheduler_lock_nest == 0)
{ {
register rt_ubase_t highest_ready_priority;
#if RT_THREAD_PRIORITY_MAX == 8
highest_ready_priority = rt_lowest_bitmap[rt_thread_ready_priority_group];
#else
register rt_ubase_t number;
/* find out the highest priority task */ /* find out the highest priority task */
if (rt_thread_ready_priority_group & 0xff) if (rt_thread_ready_priority_group & 0xff)
{ {
@ -240,6 +247,7 @@ void rt_schedule()
highest_ready_priority = (number << 3) + rt_lowest_bitmap[rt_thread_ready_table[number]]; highest_ready_priority = (number << 3) + rt_lowest_bitmap[rt_thread_ready_table[number]];
#else #else
highest_ready_priority = number; highest_ready_priority = number;
#endif
#endif #endif
/* get switch to thread */ /* get switch to thread */
to_thread = rt_list_entry(rt_thread_priority_table[highest_ready_priority].next, to_thread = rt_list_entry(rt_thread_priority_table[highest_ready_priority].next,
@ -309,7 +317,7 @@ void rt_schedule_insert_thread(struct rt_thread* thread)
/* set priority mask */ /* set priority mask */
#ifdef SCHEDULER_DEBUG #ifdef SCHEDULER_DEBUG
#if RT_THREAD_PRIORITY_MAX == 32 #if RT_THREAD_PRIORITY_MAX <= 32
rt_kprintf("insert thread, the priority: %d\n", thread->current_priority); rt_kprintf("insert thread, the priority: %d\n", thread->current_priority);
#else #else
rt_kprintf("insert thread, the priority: %d 0x%x %d\n", thread->number, thread->number_mask, thread->high_mask); rt_kprintf("insert thread, the priority: %d 0x%x %d\n", thread->number, thread->number_mask, thread->high_mask);
@ -342,7 +350,7 @@ void rt_schedule_remove_thread(struct rt_thread* thread)
temp = rt_hw_interrupt_disable(); temp = rt_hw_interrupt_disable();
#ifdef SCHEDULER_DEBUG #ifdef SCHEDULER_DEBUG
#if RT_THREAD_PRIORITY_MAX == 32 #if RT_THREAD_PRIORITY_MAX <= 32
rt_kprintf("remove thread, the priority: %d\n", thread->current_priority); rt_kprintf("remove thread, the priority: %d\n", thread->current_priority);
#else #else
rt_kprintf("remove thread, the priority: %d 0x%x %d\n", thread->number, rt_kprintf("remove thread, the priority: %d 0x%x %d\n", thread->number,