init/cutils: move list utility code to cutils from init

Change-Id: I357ceee813700297d8343159f22a07659e768d41
Signed-off-by: Dima Zavin <dima@android.com>

2 files changed, 38 insertions, 0 deletions

diff --git a/libcutils/Android.mk b/libcutils/Android.mk
index e183521d..3405deef 100644
--- a/libcutils/Android.mk
+++ b/libcutils/Android.mk
@@ -40,6 +40,7 @@ commonSources := \
 	cpu_info.c \
 	load_file.c \
 	klog.c \
+	list.c \
 	open_memstream.c \
 	strdup16to8.c \
 	strdup8to16.c \
diff --git a/libcutils/list.c b/libcutils/list.c
new file mode 100644
index 00000000..e13452d4
--- /dev/null
+++ b/libcutils/list.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <cutils/list.h>
+
+void list_init(struct listnode *node)
+{
+    node->next = node;
+    node->prev = node;
+}
+
+void list_add_tail(struct listnode *head, struct listnode *item)
+{
+    item->next = head;
+    item->prev = head->prev;
+    head->prev->next = item;
+    head->prev = item;
+}
+
+void list_remove(struct listnode *item)
+{
+    item->next->prev = item->prev;
+    item->prev->next = item->next;
+}