https://git.ruby-lang.org/ruby.git/commit/?id=74ddac1c82

From 74ddac1c822697b442646f433d60e2c099db3c3b Mon Sep 17 00:00:00 2001
From: Koichi Sasada <ko1@a...>
Date: Fri, 11 Sep 2020 18:30:27 +0900
Subject: relax dependency

vm_sync.h does not need to include vm_core.h and ractor_pub.h.

diff --git a/vm_core.h b/vm_core.h
index 1d86961..88dc905 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -1838,6 +1838,10 @@ void rb_fiber_close(rb_fiber_t *fib); https://github.com/ruby/ruby/blob/trunk/vm_core.h#L1838
 void Init_native_thread(rb_thread_t *th);
 int rb_vm_check_ints_blocking(rb_execution_context_t *ec);
 
+// vm_sync.h
+void rb_vm_cond_wait(rb_vm_t *vm, rb_nativethread_cond_t *cond);
+void rb_vm_cond_timedwait(rb_vm_t *vm, rb_nativethread_cond_t *cond, unsigned long msec);
+
 #define RUBY_VM_CHECK_INTS(ec) rb_vm_check_ints(ec)
 static inline void
 rb_vm_check_ints(rb_execution_context_t *ec)
diff --git a/vm_sync.c b/vm_sync.c
index d5b25e5..e3d0ffe 100644
--- a/vm_sync.c
+++ b/vm_sync.c
@@ -12,7 +12,7 @@ vm_locked(rb_vm_t *vm) https://github.com/ruby/ruby/blob/trunk/vm_sync.c#L12
     return vm->ractor.sync.lock_owner == GET_RACTOR();
 }
 
-#if VM_CHECK_MODE > 0
+#if RUBY_DEBUG > 0
 void
 ASSERT_vm_locking(void)
 {
@@ -21,9 +21,7 @@ ASSERT_vm_locking(void) https://github.com/ruby/ruby/blob/trunk/vm_sync.c#L21
         VM_ASSERT(vm_locked(vm));
     }
 }
-#endif
 
-#if VM_CHECK_MODE > 0
 void
 ASSERT_vm_unlocking(void)
 {
diff --git a/vm_sync.h b/vm_sync.h
index f601143..2e174bf 100644
--- a/vm_sync.h
+++ b/vm_sync.h
@@ -2,9 +2,8 @@ https://github.com/ruby/ruby/blob/trunk/vm_sync.h#L2
 #ifndef RUBY_VM_SYNC_H
 #define RUBY_VM_SYNC_H
 
-#include "vm_core.h"
 #include "vm_debug.h"
-#include "ractor_pub.h"
+RUBY_EXTERN bool ruby_multi_ractor;
 
 #if USE_RUBY_DEBUG_LOG
 #define LOCATION_ARGS const char *file, int line
@@ -24,15 +23,18 @@ void rb_vm_unlock_body(LOCATION_ARGS); https://github.com/ruby/ruby/blob/trunk/vm_sync.h#L23
 void rb_vm_lock_enter_body(unsigned int *lev APPEND_LOCATION_ARGS);
 void rb_vm_lock_leave_body(unsigned int *lev APPEND_LOCATION_ARGS);
 void rb_vm_barrier(void);
-void rb_vm_cond_wait(rb_vm_t *vm, rb_nativethread_cond_t *cond);
-void rb_vm_cond_timedwait(rb_vm_t *vm, rb_nativethread_cond_t *cond, unsigned long msec);
+
+#if RUBY_DEBUG
+// GET_VM()
+#include "vm_core.h"
+#endif
 
 static inline bool
 rb_multi_ractor_p(void)
 {
     if (LIKELY(!ruby_multi_ractor)) {
         // 0 on boot time.
-        VM_ASSERT(GET_VM()->ractor.cnt <= 1);
+        RUBY_ASSERT(GET_VM()->ractor.cnt <= 1);
         return false;
     }
     else {
@@ -84,7 +86,7 @@ rb_vm_lock_leave(unsigned int *lev, const char *file, int line) https://github.com/ruby/ruby/blob/trunk/vm_sync.h#L86
 #define RB_VM_LOCK_ENTER()  { unsigned int _lev; RB_VM_LOCK_ENTER_LEV(&_lev);
 #define RB_VM_LOCK_LEAVE()    RB_VM_LOCK_LEAVE_LEV(&_lev); }
 
-#if VM_CHECK_MODE > 0
+#if RUBY_DEBUG > 0
 void ASSERT_vm_locking(void);
 void ASSERT_vm_unlocking(void);
 #else
-- 
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