pass `th` to `thread_sched_to_waiting()`

for future extension

thread.c

@@ -174,10 +174,10 @@ static inline void blocking_region_end(rb_thread_t *th, struct rb_blocking_regio
 #define THREAD_BLOCKING_BEGIN(th) do { \
   struct rb_thread_sched * const sched = TH_SCHED(th); \
   RB_VM_SAVE_MACHINE_CONTEXT(th); \
-  thread_sched_to_waiting(sched);
+  thread_sched_to_waiting((sched), (th));
 
 #define THREAD_BLOCKING_END(th) \
-  thread_sched_to_running(sched, th); \
+  thread_sched_to_running((sched), (th)); \
   rb_ractor_thread_switch(th->ractor, th); \
 } while(0)
 
@@ -778,12 +778,12 @@ thread_start_func_2(rb_thread_t *th, VALUE *stack_start)
         // after rb_ractor_living_threads_remove()
         // GC will happen anytime and this ractor can be collected (and destroy GVL).
         // So gvl_release() should be before it.
-        thread_sched_to_dead(TH_SCHED(th));
+        thread_sched_to_dead(TH_SCHED(th), th);
         rb_ractor_living_threads_remove(th->ractor, th);
     }
     else {
         rb_ractor_living_threads_remove(th->ractor, th);
-        thread_sched_to_dead(TH_SCHED(th));
+        thread_sched_to_dead(TH_SCHED(th), th);
     }
 
     return 0;
@@ -1480,7 +1480,7 @@ blocking_region_begin(rb_thread_t *th, struct rb_blocking_region_buffer *region,
         RUBY_DEBUG_LOG("");
 
         RB_VM_SAVE_MACHINE_CONTEXT(th);
-        thread_sched_to_waiting(TH_SCHED(th));
+        thread_sched_to_waiting(TH_SCHED(th), th);
         return TRUE;
     }
     else {

thread_none.c

@@ -30,7 +30,7 @@ thread_sched_to_running(struct rb_thread_sched *sched, rb_thread_t *th)
 }
 
 static void
-thread_sched_to_waiting(struct rb_thread_sched *sched)
+thread_sched_to_waiting(struct rb_thread_sched *sched, rb_thread_t *th)
 {
 }
 

thread_pthread.c

@@ -521,7 +521,7 @@ thread_sched_to_running(struct rb_thread_sched *sched, rb_thread_t *th)
 }
 
 static rb_thread_t *
-thread_sched_to_waiting_common(struct rb_thread_sched *sched)
+thread_sched_to_waiting_common(struct rb_thread_sched *sched, rb_thread_t *th)
 {
     rb_thread_t *next;
     sched->running = NULL;
@@ -532,19 +532,19 @@ thread_sched_to_waiting_common(struct rb_thread_sched *sched)
 }
 
 static void
-thread_sched_to_waiting(struct rb_thread_sched *sched)
+thread_sched_to_waiting(struct rb_thread_sched *sched, rb_thread_t *th)
 {
     RB_INTERNAL_THREAD_HOOK(RUBY_INTERNAL_THREAD_EVENT_SUSPENDED);
     rb_native_mutex_lock(&sched->lock);
-    thread_sched_to_waiting_common(sched);
+    thread_sched_to_waiting_common(sched, th);
     rb_native_mutex_unlock(&sched->lock);
 }
 
 static void
-thread_sched_to_dead(struct rb_thread_sched *sched)
+thread_sched_to_dead(struct rb_thread_sched *sched, rb_thread_t *th)
 {
     RB_INTERNAL_THREAD_HOOK(RUBY_INTERNAL_THREAD_EVENT_EXITED);
-    thread_sched_to_waiting(sched);
+    thread_sched_to_waiting(sched, th);
 }
 
 static void
@@ -558,7 +558,7 @@ thread_sched_yield(struct rb_thread_sched *sched, rb_thread_t *th)
      */
     ubf_wakeup_all_threads();
     rb_native_mutex_lock(&sched->lock);
-    next = thread_sched_to_waiting_common(sched);
+    next = thread_sched_to_waiting_common(sched, th);
 
     /* An another thread is processing GVL yield. */
     if (UNLIKELY(sched->wait_yield)) {
@@ -2209,7 +2209,7 @@ ubf_ppoll_sleep(void *ignore)
     struct rb_thread_sched *sched = TH_SCHED(th); \
     RB_VM_SAVE_MACHINE_CONTEXT(th); \
     rb_native_mutex_lock(&sched->lock); \
-    next = thread_sched_to_waiting_common(sched); \
+    next = thread_sched_to_waiting_common((sched), (th)); \
     rb_native_mutex_unlock(&sched->lock); \
     if (!next && rb_ractor_living_thread_num(th->ractor) > 1) { \
         native_thread_yield(); \

thread_win32.c

@@ -134,7 +134,7 @@ thread_sched_to_running(struct rb_thread_sched *sched, rb_thread_t *th)
 #define thread_sched_to_dead thread_sched_to_waiting
 
 static void
-thread_sched_to_waiting(struct rb_thread_sched *sched)
+thread_sched_to_waiting(struct rb_thread_sched *sched, rb_thread_t *th)
 {
     ReleaseMutex(sched->lock);
 }
@@ -142,7 +142,7 @@ thread_sched_to_waiting(struct rb_thread_sched *sched)
 static void
 thread_sched_yield(struct rb_thread_sched *sched, rb_thread_t *th)
 {
-    thread_sched_to_waiting(sched);
+    thread_sched_to_waiting(sched, th);
     native_thread_yield();
     thread_sched_to_running(sched, th);
 }