restart Ractor.select on intterupt

signal can interrupt Ractor.select, but if there is no exception,
Ractor.select should restart automatically.

ractor.c

@@ -877,6 +877,7 @@ ractor_select(rb_execution_context_t *ec, const VALUE *rs, int alen, VALUE yield
     VALUE crv = cr->self;
     VALUE ret = Qundef;
     int i;
+    bool interrupted = false;
     enum ractor_wait_status wait_status = 0;
     bool yield_p = (yielded_value != Qundef) ? true : false;
 
@@ -914,6 +915,8 @@ ractor_select(rb_execution_context_t *ec, const VALUE *rs, int alen, VALUE yield
     }
     rs = NULL;
 
+  restart:
+
     if (yield_p) {
         actions[i].type = ractor_select_action_yield;
         actions[i].v = Qundef;
@@ -1079,6 +1082,7 @@ ractor_select(rb_execution_context_t *ec, const VALUE *rs, int alen, VALUE yield
             break;
           case wakeup_by_interrupt:
             ret = Qundef;
+            interrupted = true;
             goto cleanup;
         }
     }
@@ -1095,7 +1099,11 @@ ractor_select(rb_execution_context_t *ec, const VALUE *rs, int alen, VALUE yield
     VM_ASSERT(cr->wait.taken_basket.type == basket_type_none);
     VM_ASSERT(cr->wait.yielded_basket.type == basket_type_none);
 
-    RUBY_VM_CHECK_INTS(ec);
+    if (interrupted) {
+        rb_vm_check_ints_blocking(ec);
+        interrupted = false;
+        goto restart;
+    }
 
     VM_ASSERT(ret != Qundef);
     return ret;

thread.c

@@ -218,6 +218,12 @@ vm_check_ints_blocking(rb_execution_context_t *ec)
     return rb_threadptr_execute_interrupts(th, 1);
 }
 
+int
+rb_vm_check_ints_blocking(rb_execution_context_t *ec)
+{
+    return vm_check_ints_blocking(ec);
+}
+
 /*
  * poll() is supported by many OSes, but so far Linux is the only
  * one we know of that supports using poll() in all places select()

vm_core.h

@@ -1836,6 +1836,7 @@ void rb_execution_context_update(const rb_execution_context_t *ec);
 void rb_execution_context_mark(const rb_execution_context_t *ec);
 void rb_fiber_close(rb_fiber_t *fib);
 void Init_native_thread(rb_thread_t *th);
+int rb_vm_check_ints_blocking(rb_execution_context_t *ec);
 
 #define RUBY_VM_CHECK_INTS(ec) rb_vm_check_ints(ec)
 static inline void