libthreads: separate private functions from user interface

diff --git a/libthreads.c b/libthreads.c
index 4233c0e306bdd94d8be557f58835c3be89eb20de..6a549d412893daf7b896d72460a64c158af61581 100644 (file)
--- a/libthreads.c
+++ b/libthreads.c
@@ -55,17 +55,6 @@ static int thread_swap(struct thread *old, struct thread *new)
        return swapcontext(&old->context, &new->context);
 }
 
-int thread_yield(void)
-{
-       struct thread *old, *next;
-
-       DBG();
-       old = thread_current();
-       old->state = THREAD_READY;
-       next = model->system_thread;
-       return thread_swap(old, next);
-}
-
 static void thread_dispose(struct thread *t)
 {
        DEBUG("completed thread %d\n", thread_current()->index);
@@ -107,6 +96,9 @@ static void thread_wait_finish(void)
        while (!thread_system_next());
 }
 
+/*
+ * User program API functions
+ */
 int thread_create(struct thread *t, void (*start_routine), void *arg)
 {
        static int created = 1;
@@ -138,11 +130,25 @@ void thread_join(struct thread *t)
                thread_yield();
 }
 
+int thread_yield(void)
+{
+       struct thread *old, *next;
+
+       DBG();
+       old = thread_current();
+       old->state = THREAD_READY;
+       next = model->system_thread;
+       return thread_swap(old, next);
+}
+
 struct thread *thread_current(void)
 {
        return model->scheduler->get_current_thread();
 }
 
+/*
+ * Main system function
+ */
 int main()
 {
        struct thread user_thread;