2 files changed, 37 insertions, 0 deletions
diff --git a/kernel/include/hilbert/kernel/timer.hpp b/kernel/include/hilbert/kernel/timer.hpp
new file mode 100644
index 0000000..f4ce17e
--- /dev/null
+++ b/kernel/include/hilbert/kernel/timer.hpp
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <hilbert/kernel/application.hpp>
+
+namespace hilbert::kernel::timer {
+
+  void init_timer();
+
+  //"mibiseconds" (1 second / 1024) since january 1st 2000
+  extern uint64_t current_time;
+
+  //when current_time >= sleeping_until, puts thread into paused threads
+  void register_sleeping_thread(
+    uint64_t sleeping_until, application::thread *thread);
+
+  void on_timer_interrupt();
+
+}
diff --git a/kernel/include/hilbert/kernel/utility.hpp b/kernel/include/hilbert/kernel/utility.hpp
index a21d3fe..b0ced32 100644
--- a/kernel/include/hilbert/kernel/utility.hpp
+++ b/kernel/include/hilbert/kernel/utility.hpp
@@ -126,6 +126,25 @@ namespace hilbert::kernel::utility {
       last = n;
     }
 
+    //if other == 0, then insert at the end
+    void insert_before(value_t &&value, node *other) {
+      node *n = new node {};
+      n->value = value;
+      n->next = other;
+      if (other) {
+        n->prev = other->prev;
+        other->prev = n;
+      }
+      else {
+        n->prev = last;
+        last = n;
+      }
+      if (n->prev)
+        n->prev->next = n;
+      else
+        first = n;
+    }
+
     void clear() {
       if (first) {
         for (node *n = first->next; n; n = n->next)