X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=schedule.cc;h=64cfe99d53d7c7e7242aa5b50a0506da9ee3fb59;hb=2cf946f3bf4f12d2a353fb0c4f4644a6b2f65e56;hp=c5e58fe65cb50960db366bd39fb45177ec6fc7db;hpb=59eb730e1d19a0825008c40eb521bfc5c29df5f9;p=model-checker.git

diff --git a/schedule.cc b/schedule.cc
index c5e58fe..64cfe99 100644
--- a/schedule.cc
+++ b/schedule.cc
@@ -1,7 +1,7 @@
 #include <string.h>
 #include <stdlib.h>
 
-#include "threads.h"
+#include "threads-model.h"
 #include "schedule.h"
 #include "common.h"
 #include "model.h"
@@ -9,7 +9,7 @@
 
 /** Constructor */
 Scheduler::Scheduler() :
-	is_enabled(NULL),
+	enabled(NULL),
 	enabled_len(0),
 	curr_thread_index(0),
 	current(NULL)
@@ -21,25 +21,67 @@ void Scheduler::set_enabled(Thread *t, enabled_type_t enabled_status) {
 	if (threadid>=enabled_len) {
 		enabled_type_t *new_enabled = (enabled_type_t *)snapshot_malloc(sizeof(enabled_type_t) * (threadid + 1));
 		memset(&new_enabled[enabled_len], 0, (threadid+1-enabled_len)*sizeof(enabled_type_t));
-		if (is_enabled != NULL) {
-			memcpy(new_enabled, is_enabled, enabled_len*sizeof(enabled_type_t));
-			snapshot_free(is_enabled);
+		if (enabled != NULL) {
+			memcpy(new_enabled, enabled, enabled_len*sizeof(enabled_type_t));
+			snapshot_free(enabled);
 		}
-		is_enabled=new_enabled;
+		enabled=new_enabled;
 		enabled_len=threadid+1;
 	}
-	is_enabled[threadid]=enabled_status;
+	enabled[threadid]=enabled_status;
+	if (enabled_status == THREAD_DISABLED)
+		model->check_promises_thread_disabled();
 }
 
-enabled_type_t Scheduler::get_enabled(Thread *t) {
-	return is_enabled[id_to_int(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 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_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());
+	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) {
-			is_enabled[i]=THREAD_SLEEP_SET;
+			enabled[i]=THREAD_SLEEP_SET;
 		}
 	}
 }
@@ -71,6 +113,7 @@ void Scheduler::remove_sleep(Thread *t)
 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);
 }
 
@@ -102,7 +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);
 }
 
@@ -118,10 +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 (is_enabled[curr_thread_index]==THREAD_ENABLED) {
-				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) {
@@ -129,6 +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());
 	}
@@ -143,6 +204,7 @@ Thread * Scheduler::next_thread(Thread *t)
  */
 Thread * Scheduler::get_current_thread() const
 {
+	ASSERT(!current || !current->is_model_thread());
 	return current;
 }