X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=ao_task.c;h=b69f51ee432f61c5b0f408df01c5123301f11e00;hp=4fb8405595c5b4a1ffc0fc68e1844f243bb07be2;hb=7bc3d9962872850e7b420221cf689db16b4305cc;hpb=022f83ca6fd589005d8eb3e25e633950fef69fa7

diff --git a/ao_task.c b/ao_task.c
index 4fb84055..b69f51ee 100644
--- a/ao_task.c
+++ b/ao_task.c
@@ -25,13 +25,14 @@ __data uint8_t ao_cur_task_index;
 __xdata struct ao_task *__data ao_cur_task;
 
 void
-ao_add_task(__xdata struct ao_task * task, void (*start)(void))
+ao_add_task(__xdata struct ao_task * task, void (*start)(void), __code char *name) __reentrant
 {
 	uint8_t	__xdata *stack;
 	if (ao_num_tasks == AO_NUM_TASKS)
 		ao_panic(AO_PANIC_NO_TASK);
 	ao_tasks[ao_num_tasks++] = task;
 	task->task_id = ao_num_tasks;
+	task->name = name;
 	/*
 	 * Construct a stack frame so that it will 'return'
 	 * to the start of the task
@@ -94,9 +95,9 @@ ao_yield(void) _naked
 	
 	if (ao_cur_task_index != AO_NO_TASK_INDEX)
 	{
-	uint8_t stack_len;
-	__data uint8_t *  stack_ptr;
-	__xdata uint8_t * save_ptr;
+		uint8_t stack_len;
+		__data uint8_t *stack_ptr;
+		__xdata uint8_t *save_ptr;
 		/* Save the current stack */
 		stack_len = SP - (AO_STACK_START - 1);
 		ao_cur_task->stack_count = stack_len;
@@ -113,19 +114,29 @@ ao_yield(void) _naked
 	/* Find a task to run. If there isn't any runnable task,
 	 * this loop will run forever, which is just fine
 	 */
-	for (;;) {
-		++ao_cur_task_index;
-		if (ao_cur_task_index == ao_num_tasks)
-			ao_cur_task_index = 0;
-		ao_cur_task = ao_tasks[ao_cur_task_index];
-		if (ao_cur_task->wchan == NULL)
-			break;
+	{
+		__pdata uint8_t	ao_next_task_index = ao_cur_task_index;
+		for (;;) {
+			++ao_next_task_index;
+			if (ao_next_task_index == ao_num_tasks)
+				ao_next_task_index = 0;
+
+			ao_cur_task = ao_tasks[ao_next_task_index];
+			if (ao_cur_task->wchan == NULL) {
+				ao_cur_task_index = ao_next_task_index;
+				break;
+			}
+
+			/* Enter lower power mode when there isn't anything to do */
+			if (ao_next_task_index == ao_cur_task_index)
+				PCON = PCON_IDLE;
+		}
 	}
 
 	{
 		uint8_t stack_len;
-		__data uint8_t *  stack_ptr;
-		__xdata uint8_t * save_ptr;
+		__data uint8_t *stack_ptr;
+		__xdata uint8_t *save_ptr;
 
 		/* Restore the old stack */
 		stack_len = ao_cur_task->stack_count;
@@ -168,16 +179,16 @@ ao_yield(void) _naked
 	_endasm;
 }
 
-int
+void
 ao_sleep(__xdata void *wchan)
 {
 	__critical {
-	ao_cur_task->wchan = wchan;
+		ao_cur_task->wchan = wchan;
 	}
 	ao_yield();
 }
 
-int
+void
 ao_wakeup(__xdata void *wchan)
 {
 	uint8_t	i;
@@ -188,9 +199,25 @@ ao_wakeup(__xdata void *wchan)
 }
 
 void
-ao_start_scheduler(void)
+ao_task_info(void)
 {
+	uint8_t	i;
+	uint8_t pc_loc;
+	__xdata struct ao_task *task;
+
+	for (i = 0; i < ao_num_tasks; i++) {
+		task = ao_tasks[i];
+		pc_loc = task->stack_count - 17;
+		printf("%12s: wchan %04x pc %04x\n",
+		       (char *) task->name,
+		       (int16_t) task->wchan,
+		       (task->stack[pc_loc]) | (task->stack[pc_loc+1] << 8));
+	}
+}
 
+void
+ao_start_scheduler(void)
+{
 	ao_cur_task_index = AO_NO_TASK_INDEX;
 	ao_cur_task = NULL;
 	ao_yield();