1 files changed, 3 insertions, 11 deletions
diff --git a/thread_win32.h b/thread_win32.h
index 12aef02728..23cd71fcfe 100644
--- a/thread_win32.h
+++ b/thread_win32.h
@@ -21,18 +21,13 @@
 WINBASEAPI BOOL WINAPI
 TryEnterCriticalSection(IN OUT LPCRITICAL_SECTION lpCriticalSection);
 
-struct rb_thread_cond_struct {
-    struct cond_event_entry *next;
-    struct cond_event_entry *prev;
-};
-
 struct rb_native_thread {
     HANDLE thread_id;
     HANDLE interrupt_event;
 };
 
 struct rb_thread_sched_item {
-    char dmy;
+    void *vm_stack;
 };
 
 struct rb_thread_sched {
@@ -44,11 +39,8 @@ typedef DWORD native_tls_key_t; // TLS index
 static inline void *
 native_tls_get(native_tls_key_t key)
 {
-    void *ptr = TlsGetValue(key);
-    if (UNLIKELY(ptr == NULL)) {
-        rb_bug("TlsGetValue() returns NULL");
-    }
-    return ptr;
+    // return value should be checked by caller.
+    return TlsGetValue(key);
 }
 
 static inline void