(basic, not much tested) keyboard, better panic

1 files changed, 12 insertions, 10 deletions

diff --git a/src/kernel/task.c b/src/kernel/task.c
index 2a1f4c4..e2c19ca 100644
--- a/src/kernel/task.c
+++ b/src/kernel/task.c
@@ -70,24 +70,26 @@ void new_task(struct task_state state) {
       tasks[n] = state;
       return;
     }
-  panic("Maximum number of tasks reached.");
+  PANIC("Maximum number of tasks reached.");
 }
 
 void advance_active_task() {
-  struct task_state *prev_task = active_task;
-  do {
+  do
     if (++active_task == tasks + MAX_TASKS)
       active_task = tasks;
-    if (active_task == prev_task) {
-      set_log_mode(LOG_SYSTEM);
-      logsz("No active tasks, halting.");
-      while (1)
-        asm ("hlt");
-    }
-  }
   while (!active_task->page_directory);
 }
 
+void make_sure_tasks() {
+  for (uint8_t n = 0; n < MAX_TASKS; ++n)
+    if (tasks[n].page_directory)
+      return;
+  set_log_mode(LOG_SYSTEM);
+  logsz("No active tasks, halting.");
+  while (1)
+    asm ("hlt");
+}
+
 void delete_task(struct task_state *state) {
   free_task_pd(state->page_directory);
   state->page_directory = 0;