X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=schedule.cc;h=64cfe99d53d7c7e7242aa5b50a0506da9ee3fb59;hb=ea16f9a5121a4e58881a88c0d29fca9138e72464;hp=cca60ebfba45795252c4e3de97d1223b934aa0f4;hpb=e919b30ee6f7aa594c61fc305e6e88e789dbd700;p=model-checker.git

diff --git a/schedule.cc b/schedule.cc
index cca60eb..64cfe99 100644
--- a/schedule.cc
+++ b/schedule.cc
@@ -1,10 +1,11 @@
 #include <string.h>
 #include <stdlib.h>
 
-#include "threads.h"
+#include "threads-model.h"
 #include "schedule.h"
 #include "common.h"
 #include "model.h"
+#include "nodestack.h"
 
 /** Constructor */
 Scheduler::Scheduler() :
@@ -28,17 +29,81 @@ void Scheduler::set_enabled(Thread *t, enabled_type_t enabled_status) {
 		enabled_len=threadid+1;
 	}
 	enabled[threadid]=enabled_status;
+	if (enabled_status == THREAD_DISABLED)
+		model->check_promises_thread_disabled();
 }
 
 /**
  * @brief Check if a Thread is currently enabled
+ *
+ * Check if a Thread is currently enabled. "Enabled" includes both
+ * THREAD_ENABLED and THREAD_SLEEP_SET.
+ * @param t The Thread to check
+ * @return True if the Thread is currently enabled
+ */
+bool Scheduler::is_enabled(const Thread *t) const
+{
+	return is_enabled(t->get_id());
+}
+
+/**
+ * @brief Check if a Thread is currently enabled
+ *
+ * Check if a Thread is currently enabled. "Enabled" includes both
+ * THREAD_ENABLED and THREAD_SLEEP_SET.
+ * @param tid The ID of the Thread to check
+ * @return True if the Thread is currently enabled
+ */
+bool Scheduler::is_enabled(thread_id_t tid) const
+{
+	int i = id_to_int(tid);
+	return (i >= enabled_len) ? false : (enabled[i] != THREAD_DISABLED);
+}
+
+/**
+ * @brief Check if a Thread is currently in the sleep set
  * @param t The Thread to check
  * @return True if the Thread is currently enabled
  */
-bool Scheduler::is_enabled(Thread *t) const
+bool Scheduler::is_sleep_set(const Thread *t) const
+{
+	return get_enabled(t) == THREAD_SLEEP_SET;
+}
+
+enabled_type_t Scheduler::get_enabled(const Thread *t) const
 {
 	int id = id_to_int(t->get_id());
-	return (id >= enabled_len) ? false : (enabled[id] == THREAD_ENABLED);
+	ASSERT(id < enabled_len);
+	return enabled[id];
+}
+
+void Scheduler::update_sleep_set(Node *n) {
+	enabled_type_t *enabled_array=n->get_enabled_array();
+	for(int i=0;i<enabled_len;i++) {
+		if (enabled_array[i]==THREAD_SLEEP_SET) {
+			enabled[i]=THREAD_SLEEP_SET;
+		}
+	}
+}
+
+/**
+ * Add a Thread to the sleep set.
+ * @param t The Thread to add
+ */
+void Scheduler::add_sleep(Thread *t)
+{
+	DEBUG("thread %d\n", id_to_int(t->get_id()));
+	set_enabled(t, THREAD_SLEEP_SET);
+}
+
+/**
+ * Remove a Thread from the sleep set.
+ * @param t The Thread to remove
+ */
+void Scheduler::remove_sleep(Thread *t)
+{
+	DEBUG("thread %d\n", id_to_int(t->get_id()));
+	set_enabled(t, THREAD_ENABLED);
 }
 
 /**
@@ -48,6 +113,7 @@ bool Scheduler::is_enabled(Thread *t) const
 void Scheduler::add_thread(Thread *t)
 {
 	DEBUG("thread %d\n", id_to_int(t->get_id()));
+	ASSERT(!t->is_model_thread());
 	set_enabled(t, THREAD_ENABLED);
 }
 
@@ -79,7 +145,8 @@ void Scheduler::sleep(Thread *t)
  */
 void Scheduler::wake(Thread *t)
 {
-	set_enabled(t, THREAD_DISABLED);
+	ASSERT(!t->is_model_thread());
+	set_enabled(t, THREAD_ENABLED);
 	t->set_state(THREAD_READY);
 }
 
@@ -95,10 +162,24 @@ Thread * Scheduler::next_thread(Thread *t)
 {
 	if ( t == NULL ) {
 		int old_curr_thread = curr_thread_index;
+		bool have_enabled_thread_with_priority=false;
+		Node *n=model->get_curr_node();
+
+		for(int i=0;i<enabled_len;i++) {
+			thread_id_t tid=int_to_id(i);
+			if (n->has_priority(tid)) {
+				//Have a thread with priority
+				if (enabled[i]!=THREAD_DISABLED)
+					have_enabled_thread_with_priority=true;
+			}
+		}
+
 		while(true) {
 			curr_thread_index = (curr_thread_index+1) % enabled_len;
-			if (enabled[curr_thread_index]) {
-				t = model->get_thread(int_to_id(curr_thread_index));
+			thread_id_t curr_tid=int_to_id(curr_thread_index);
+			if (enabled[curr_thread_index]==THREAD_ENABLED&&
+					(!have_enabled_thread_with_priority||n->has_priority(curr_tid))) {
+				t = model->get_thread(curr_tid);
 				break;
 			}
 			if (curr_thread_index == old_curr_thread) {
@@ -106,6 +187,9 @@ Thread * Scheduler::next_thread(Thread *t)
 				return NULL;
 			}
 		}
+	} else if (t->is_model_thread()) {
+		/* model-checker threads never run */
+		t = NULL;
 	} else {
 		curr_thread_index = id_to_int(t->get_id());
 	}
@@ -120,6 +204,7 @@ Thread * Scheduler::next_thread(Thread *t)
  */
 Thread * Scheduler::get_current_thread() const
 {
+	ASSERT(!current || !current->is_model_thread());
 	return current;
 }