1 files changed, 10 insertions, 4 deletions
diff --git a/thread_pthread.h b/thread_pthread.h
index 97a26e0e80..781712c3f6 100644
--- a/thread_pthread.h
+++ b/thread_pthread.h
@@ -35,11 +35,17 @@ typedef struct native_thread_data_struct {
 #include <semaphore.h>
 
 typedef struct rb_global_vm_lock_struct {
+    /* fast path */
+    unsigned long acquired;
     pthread_mutex_t lock;
-    struct rb_thread_struct * volatile waiting_threads;
-    struct rb_thread_struct *waiting_last_thread;
-    int waiting;
-    int volatile acquired;
+
+    /* slow path */
+    unsigned long waiting;
+    rb_thread_cond_t cond;
+
+    /* yield */
+    rb_thread_cond_t switch_cond;
+    unsigned long need_yield;
 } rb_global_vm_lock_t;
 
 #endif /* RUBY_THREAD_PTHREAD_H */