From e5877f1c96b759a7468341c354027638ca7ced33 Mon Sep 17 00:00:00 2001
From: matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 9 Apr 2003 08:27:01 +0000
Subject: * gc.c (rb_gc_mark_children): introduce this function again; this  
 is required when stack was very tight. [ruby-talk:68916]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3657 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 gc.c | 60 +++++++++++++++++++++++++++++++++++-------------------------
 1 file changed, 35 insertions(+), 25 deletions(-)

(limited to 'gc.c')

diff --git a/gc.c b/gc.c
index 57e1ebac8f..ae7cff920d 100644
--- a/gc.c
+++ b/gc.c
@@ -462,22 +462,7 @@ sweep_source_filename(key, value)
     }
 }
 
-static void
-gc_mark_rest()
-{
-    VALUE tmp_arry[MARK_STACK_MAX];
-    VALUE *p;
-
-    p = (mark_stack_ptr - mark_stack) + tmp_arry;
-    MEMCPY(tmp_arry, mark_stack, VALUE, MARK_STACK_MAX);
-
-    init_mark_stack();
-    while(p != tmp_arry){
-	p--;
-	FL_UNSET(*p, FL_MARK);
-	rb_gc_mark(*p);
-    }
-}
+static void rb_gc_mark_children _((VALUE ptr));
 
 static void
 gc_mark_all()
@@ -485,21 +470,35 @@ gc_mark_all()
     RVALUE *p, *pend;
     int i;
 
-    gc_mark_rest();
     init_mark_stack();
     for (i = 0; i < heaps_used; i++) {
 	p = heaps[i]; pend = p + heaps_limits[i];
 	while (p < pend) {
 	    if ((p->as.basic.flags & FL_MARK) &&
 		(p->as.basic.flags != FL_MARK)) {
-		FL_UNSET(p, FL_MARK);
-		rb_gc_mark((VALUE)p);
+		rb_gc_mark_children((VALUE)p);
 	    }
 	    p++;
 	}
     }
 }
 
+static void
+gc_mark_rest()
+{
+    VALUE tmp_arry[MARK_STACK_MAX];
+    VALUE *p;
+
+    p = (mark_stack_ptr - mark_stack) + tmp_arry;
+    MEMCPY(tmp_arry, mark_stack, VALUE, MARK_STACK_MAX);
+
+    init_mark_stack();
+    while(p != tmp_arry){
+	p--;
+	rb_gc_mark_children(*p);
+    }
+}
+
 static inline int
 is_pointer_to_heap(ptr)
     void *ptr;
@@ -600,13 +599,14 @@ rb_gc_mark(ptr)
     int ret;
     register RVALUE *obj;
 
+    obj = RANY(ptr);
+    if (rb_special_const_p(ptr)) return; /* special const not marked */
+    if (obj->as.basic.flags == 0) return;       /* free cell */
+    if (obj->as.basic.flags & FL_MARK) return;  /* already marked */ 
+    obj->as.basic.flags |= FL_MARK;
+
     CHECK_STACK(ret);
     if (ret) {
-	obj = RANY(ptr);
-	if (rb_special_const_p(ptr)) return; /* special const not marked */
-	if (obj->as.basic.flags == 0) return;       /* free cell */
-	if (obj->as.basic.flags & FL_MARK) return;  /* already marked */ 
-	obj->as.basic.flags |= FL_MARK;
 	if (!mark_stack_overflow) {
 	    if (mark_stack_ptr - mark_stack < MARK_STACK_MAX) {
 		*mark_stack_ptr = ptr;
@@ -618,15 +618,25 @@ rb_gc_mark(ptr)
 	}
 	return;
     }
+    rb_gc_mark_children(ptr);
+}
+
+static void
+rb_gc_mark_children(ptr)
+    VALUE ptr;
+{
+    register RVALUE *obj = RANY(ptr);
+
+    goto marking;		/* skip */
 
   again:
     obj = RANY(ptr);
     if (rb_special_const_p(ptr)) return; /* special const not marked */
     if (obj->as.basic.flags == 0) return;       /* free cell */
     if (obj->as.basic.flags & FL_MARK) return;  /* already marked */ 
-
     obj->as.basic.flags |= FL_MARK;
 
+  marking:
     if (FL_TEST(obj, FL_EXIVAR)) {
 	rb_mark_generic_ivar(ptr);
     }
-- 
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