1 files changed, 10 insertions, 0 deletions
diff --git a/src/threads/thread.h b/src/threads/thread.h
index 0039560..b209036 100644
--- a/src/threads/thread.h
+++ b/src/threads/thread.h
@@ -80,6 +80,12 @@ typedef int tid_t;
    only because they are mutually exclusive: only a thread in the
    ready state is on the run queue, whereas only a thread in the
    blocked state is on a semaphore wait list. */
+struct fd
+  {
+    bool active;
+    struct file *file;
+  };
+
 struct thread
   {
     /* Owned by thread.c. */
@@ -95,6 +101,10 @@ struct thread
 #ifdef USERPROG
     /* Owned by userprog/process.c. */
     uint32_t *pagedir;                  /* Page directory. */
+
+    int num_files;
+    int max_files;
+    struct fd *files;                   /* Pointer to array of file descriptors. */
 #endif
 
     /* Owned by thread.c. */