Add ability to free information on task delete.

cpukit/libmisc/capture/capture.c

@@ -79,6 +79,7 @@ static rtems_task_priority      capture_ceiling;
 static rtems_task_priority      capture_floor;
 static uint32_t           capture_tick_period;
 static rtems_id                 capture_reader;
+int rtems_capture_free_info_on_task_delete;
 
 /*
  * RTEMS Event text.
@@ -289,7 +290,7 @@ rtems_capture_create_control (rtems_name name, rtems_id id)
      * We need to scan the task list as set the control to the
      * tasks.
      */
-    for (task = capture_tasks; task != NULL; task = task->next)
+    for (task = capture_tasks; task != NULL; task = task->forw)
       if (rtems_capture_match_name_id (name, id, task->name, task->id))
         task->control = control;
 
@@ -345,7 +346,10 @@ rtems_capture_create_capture_task (rtems_tcb* new_task)
 
   rtems_interrupt_disable (level);
 
-  task->next    = capture_tasks;
+  task->forw    = capture_tasks;
+  if (task->forw)
+    task->forw->back = task;
+  task->back    = NULL;
   capture_tasks = task;
 
   rtems_interrupt_enable (level);
@@ -586,6 +590,19 @@ rtems_capture_delete_task (rtems_tcb* current_task,
    * This task's tcb will be invalid.
    */
   dt->tcb = 0;
+
+  /*
+   * Unlink
+   */
+  if (rtems_capture_free_info_on_task_delete) {
+    if (dt->forw)
+      dt->forw->back = dt->back;
+    if (dt->back)
+      dt->back->forw = dt->forw;
+    else
+      capture_tasks = dt->forw;
+    _Workspace_Free (dt);
+  }
 }
 
 /*
@@ -685,7 +702,7 @@ rtems_capture_switch_task (rtems_tcb* current_task,
     {
       rtems_id ct_id = current_task->Object.id;
 
-      for (ct = capture_tasks; ct; ct = ct->next)
+      for (ct = capture_tasks; ct; ct = ct->forw)
         if (ct->id == ct_id)
           break;
     }
@@ -926,7 +943,7 @@ rtems_capture_close ()
   while (task)
   {
     rtems_capture_task_t* delete = task;
-    task = task->next;
+    task = task->forw;
     _Workspace_Free (delete);
   }
 
@@ -998,7 +1015,7 @@ rtems_capture_flush (rtems_boolean prime)
 
   rtems_interrupt_disable (level);
 
-  for (task = capture_tasks; task != NULL; task = task->next)
+  for (task = capture_tasks; task != NULL; task = task->forw)
     task->flags &= ~RTEMS_CAPTURE_TRACED;
 
   if (prime)
@@ -1075,7 +1092,7 @@ rtems_capture_watch_del (rtems_name name, rtems_id id)
     {
       rtems_interrupt_disable (level);
 
-      for (task = capture_tasks; task != NULL; task = task->next)
+      for (task = capture_tasks; task != NULL; task = task->forw)
         if (task->control == control)
           task->control = 0;
 

cpukit/libmisc/capture/capture.h

@@ -103,7 +103,8 @@ typedef struct rtems_capture_task_s
   uint32_t               last_ticks;
   uint32_t               last_tick_offset;
   rtems_capture_control_t*     control;
-  struct rtems_capture_task_s* next;
+  struct rtems_capture_task_s* forw;
+  struct rtems_capture_task_s* back;
 } rtems_capture_task_t;
 
 /**
@@ -191,6 +192,16 @@ rtems_status_code
 rtems_capture_open (uint32_t          size,
                     rtems_capture_timestamp timestamp);
 
+/**
+ * rtems_capture_free_info_on_task_delete
+ *
+ *  DESCRIPTION:
+ *
+ * If non-zero task informaion if freed when a task is deleted.
+ *
+ */
+extern int rtems_capture_free_info_on_task_delete;
+
 /**
  * rtems_capture_close
  *
@@ -458,7 +469,7 @@ rtems_capture_get_task_list ();
 static inline rtems_capture_task_t*
 rtems_capture_next_task (rtems_capture_task_t* task)
 {
-  return task->next;
+  return task->forw;
 }
 
 /**