From 84adefa331c4159d432d22840663c38f155cd4c1 Mon Sep 17 00:00:00 2001
From: Erlang/OTP <otp@erlang.org>
Date: Fri, 20 Nov 2009 14:54:40 +0000
Subject: The R13B03 release.

---
 lib/erl_interface/src/registry/reg_purge.c | 76 ++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 lib/erl_interface/src/registry/reg_purge.c

(limited to 'lib/erl_interface/src/registry/reg_purge.c')

diff --git a/lib/erl_interface/src/registry/reg_purge.c b/lib/erl_interface/src/registry/reg_purge.c
new file mode 100644
index 0000000000..329fd32f23
--- /dev/null
+++ b/lib/erl_interface/src/registry/reg_purge.c
@@ -0,0 +1,76 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 1998-2009. All Rights Reserved.
+ * 
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ * 
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * %CopyrightEnd%
+ *
+
+ */
+#include <stdlib.h>
+#include "reg.h"
+
+static ei_bucket *do_purge(ei_reg *reg, int i)
+{
+  ei_hash *tab = reg->tab;
+  ei_bucket *head = tab->tab[i];
+  ei_bucket *this, *next;
+  ei_reg_obj *obj;
+
+  /* first position special case */
+  while ((this=head)) {
+    obj = (ei_reg_obj*)(this->value); /* cast to eliminate 'const' warning */
+    if (obj->attr & EI_DELET) {
+      head = this->next;
+      ei_reg_free(reg,obj); /* free obj to freelist */
+      ei_hash_bfree(tab,this); /* free bucket to freelist */
+      tab->nelem--;
+    }
+    else break;
+  }
+
+  /* check remaining positions */
+  this = head;
+  while (this && this->next) {
+    next = this->next;
+    obj = (ei_reg_obj*)(next->value); /* cast to eliminate 'const' warning */
+    if (obj->attr & EI_DELET) {
+      this->next = next->next;
+      ei_reg_free(reg,obj); /* free object to freelist */
+      ei_hash_bfree(tab,next); /* free bucket to freelist */
+      tab->nelem--;
+    }
+    else this = this->next; 
+  }
+  
+  return head;
+}
+
+int ei_reg_purge(ei_reg *reg)
+{
+  ei_hash *tab;
+  int i;
+
+  if (!reg) return -1;
+  tab = reg->tab;
+
+  for (i=0;i<tab->size;i++) {
+    if ((tab->tab[i])) {
+      tab->tab[i] = do_purge(reg,i);
+      if (!tab->tab[i]) tab->npos--;
+    }
+  }
+
+  return 0;
+}
-- 
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