userprog: tweak test program to use simple loads/stores

diff --git a/userprog.c b/userprog.c
index ba0c867fd195c86b08cee679468f9a93624736a1..402cb0d29128aadef5cf67c71a8ca9cf976f4922 100644 (file)
--- a/userprog.c
+++ b/userprog.c
@@ -2,22 +2,26 @@
 
 #include "libthreads.h"
 #include "libatomic.h"
+#include "librace.h"
 
 static void a(atomic_int *obj)
 {
        int i;
        int ret;
 
-       for (i = 0; i < 10; i++) {
+       store_32(&i, 10);
+       printf("load 32 yields: %d\n", load_32(&i));
+
+       for (i = 0; i < 2; i++) {
                printf("Thread %d, loop %d\n", thrd_current(), i);
                switch (i % 4) {
                case 1:
                        ret = atomic_load(obj);
                        printf("Read value: %d\n", ret);
                        break;
-               case 3:
-                       atomic_store(obj, i);
-                       printf("Write value: %d\n", i);
+               case 0:
+                       atomic_store(obj, i + 1);
+                       printf("Write value: %d\n", i + 1);
                        break;
                }
        }