X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=threads.cc;h=a8f282a8b32efdb96d1d248570fc8b7574af92f7;hb=3e520de48b5be0b0d4fa4a5f033e207b17c4496d;hp=6b4e2c740ab50b7b55f624b7bda05a4c9ad72678;hpb=84d0cd2f078f4cb15c318a0fef2515feab570375;p=model-checker.git

diff --git a/threads.cc b/threads.cc
index 6b4e2c7..a8f282a 100644
--- a/threads.cc
+++ b/threads.cc
@@ -23,7 +23,13 @@ static void stack_free(void *stack)
 	snapshot_free(stack);
 }
 
-/** Return the currently executing thread. */
+/**
+ * @brief Get the current Thread
+ *
+ * Must be called from a user context
+ *
+ * @return The currently executing thread
+ */
 Thread * thread_current(void)
 {
 	ASSERT(model);
@@ -84,6 +90,7 @@ int Thread::create_context()
  */
 int Thread::swap(Thread *t, ucontext_t *ctxt)
 {
+	t->set_state(THREAD_READY);
 	return swapcontext(&t->context, ctxt);
 }
 
@@ -97,6 +104,7 @@ int Thread::swap(Thread *t, ucontext_t *ctxt)
  */
 int Thread::swap(ucontext_t *ctxt, Thread *t)
 {
+	t->set_state(THREAD_RUNNING);
 	return swapcontext(ctxt, &t->context);
 }
 
@@ -104,12 +112,11 @@ int Thread::swap(ucontext_t *ctxt, Thread *t)
 /** Terminate a thread and free its stack. */
 void Thread::complete()
 {
-	if (!is_complete()) {
-		DEBUG("completed thread %d\n", id_to_int(get_id()));
-		state = THREAD_COMPLETED;
-		if (stack)
-			stack_free(stack);
-	}
+	ASSERT(!is_complete());
+	DEBUG("completed thread %d\n", id_to_int(get_id()));
+	state = THREAD_COMPLETED;
+	if (stack)
+		stack_free(stack);
 }
 
 /**
@@ -162,14 +169,15 @@ Thread::Thread(thrd_t *t, void (*func)(void *), void *a) :
 		model_print("Error in create_context\n");
 
 	id = model->get_next_id();
-	*user_thread = id;
+	user_thread->priv = this;
 	parent = thread_current();
 }
 
 /** Destructor */
 Thread::~Thread()
 {
-	complete();
+	if (!is_complete())
+		complete();
 	model->remove_thread(this);
 }
 
@@ -178,3 +186,13 @@ thread_id_t Thread::get_id() const
 {
 	return id;
 }
+
+/**
+ * Set a thread's THREAD_* state (@see thread_state)
+ * @param s The state to enter
+ */
+void Thread::set_state(thread_state s)
+{
+	ASSERT(s == THREAD_COMPLETED || state != THREAD_COMPLETED);
+	state = s;
+}