Eliminate public use of non-public task structure

Revises several trivial task APIs to avoid exposure of task object
internal fields.

Change-Id: Iefa8028042dff1abd1f447eb1cc1ee49f0c2eda5
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>

include/microkernel/task.h

@@ -37,8 +37,6 @@
 extern "C" {
 #endif
 
-extern struct k_proc *_k_current_task;
-
 /*
  * The following task groups are reserved for system use.
  * SysGen automatically generates corresponding TASKGROUPs with reserved
@@ -85,16 +83,18 @@ extern int task_offload_to_fiber(int (*)(), void *);
 extern void KS_TaskSetSwitchCallBack(taskswitchcallbackfunc func);
 #endif
 
-#define task_id_get() (_k_current_task->Ident)
+extern ktask_t task_id_get();
-#define task_priority_get() (_k_current_task->Prio)
+extern kpriority_t task_priority_get();
+
 #define task_start(t) _task_ioctl(t, TASK_START)
 #define task_abort(t) _task_ioctl(t, TASK_ABORT)
 #define task_suspend(t) _task_ioctl(t, TASK_SUSPEND)
 #define task_resume(t) _task_ioctl(t, TASK_RESUME)
 
-#define task_group_mask_get() (_k_current_task->Group)
+extern uint32_t task_group_mask_get();
-#define task_group_join(g) (_k_current_task->Group |= g)
+extern void task_group_join(uint32_t groups);
-#define task_group_leave(g) (_k_current_task->Group &= ~g)
+extern void task_group_leave(uint32_t groups);
+
 #define task_group_start(g) _task_group_ioctl(g, TASK_GROUP_START)
 #define task_group_abort(g) _task_group_ioctl(g, TASK_GROUP_ABORT)
 #define task_group_suspend(g) _task_group_ioctl(g, TASK_GROUP_SUSPEND)

kernel/microkernel/k_task.c

@@ -42,6 +42,18 @@
 #include <start_task_arch.h>
 
 
+/*******************************************************************************
+*
+* task_id_get - get task identifer
+*
+* RETURNS: identifier for current task
+*/
+
+ktask_t task_id_get(void)
+{
+	return _k_current_task->Ident;
+}
+
 /*******************************************************************************
 *
 * reset_state_bit - reset the specified task state bits
@@ -434,6 +446,54 @@ void _task_group_ioctl(ktask_group_t group, /* task group */
 	KERNEL_ENTRY(&A);
 }
 
+/*******************************************************************************
+*
+* task_group_mask_get - get task groups for task
+*
+* RETURNS: task groups associated with current task
+*/
+
+kpriority_t task_group_mask_get(void)
+{
+	return _k_current_task->Group;
+}
+
+/*******************************************************************************
+*
+* task_group_join - add task to task group(s)
+*
+* RETURNS: N/A
+*/
+
+void task_group_join(uint32_t groups)
+{
+	_k_current_task->Group |= groups;
+}
+
+/*******************************************************************************
+*
+* task_group_leave - remove task from task group(s)
+*
+* RETURNS: N/A
+*/
+
+void task_group_leave(uint32_t groups)
+{
+	_k_current_task->Group &= ~groups;
+}
+
+/*******************************************************************************
+*
+* task_priority_get - get task priority
+*
+* RETURNS: priority of current task
+*/
+
+kpriority_t task_priority_get(void)
+{
+	return _k_current_task->Prio;
+}
+
 /*******************************************************************************
 *
 * _k_task_priority_set - handle task set priority request