gistfile1.diff

diff --git a/ut.c b/ut.c
index 8afe46c..88ebf7b 100644
--- a/ut.c
+++ b/ut.c
@@ -24,8 +24,7 @@ int ut_init(int tab_size)
 
 tid_t ut_spawn_thread(void (*func)(int), int arg)
 {
-    ut_slot_t *p = ut_slots;
-    p += sizeof(ut_slot_t)*thread_count;
+    ut_slot_t *p = ut_slots + thread_count;
     
     p->stack = (char*)malloc(8912);
     if (p->stack == NULL)
@@ -52,8 +51,7 @@ void handler(int signal)
 {
     if (signal == SIGVTALRM)
     {
-        ut_slot_t *p = ut_slots;
-        p += sizeof(ut_slot_t)*currThreadNum;
+        ut_slot_t *p = ut_slots + currThreadNum;
         p->vtime += 100;
         printf("thread %d timer\n", currThreadNum);
     }
@@ -63,8 +61,8 @@ void handler(int signal)
         p = ut_slots;
         t = ut_slots;
         nextThreadNum = (currThreadNum + 1) % thread_count;
-        p += sizeof(ut_slot_t)*currThreadNum;
-        t += sizeof(ut_slot_t)*nextThreadNum;
+        p += currThreadNum;
+        t += nextThreadNum;
 
         alarm(1);
         printf("in handler, switch from %d to %d\n", currThreadNum, nextThreadNum);