dnn/queue: add queue and safe_queue support

Signed-off-by: Xie, Lin <lin.xie@intel.com>
Signed-off-by: Wu Zhiwen <zhiwen.wu@intel.com>
Signed-off-by: Guo, Yejun <yejun.guo@intel.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/libavfilter/dnn/safe_queue.h b/libavfilter/dnn/safe_queue.h
new file mode 100644
index 0000000000..aaa15fadf2
--- /dev/null
+++ b/libavfilter/dnn/safe_queue.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2020
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVFILTER_DNN_SAFE_QUEUE_H
+#define AVFILTER_DNN_SAFE_QUEUE_H
+
+typedef struct _safe_queue safe_queue;
+
+safe_queue *safe_queue_create(void);
+void safe_queue_destroy(safe_queue *sq);
+
+size_t safe_queue_size(safe_queue *sq);
+
+void safe_queue_push_front(safe_queue *sq, void *v);
+void safe_queue_push_back(safe_queue *sq, void *v);
+
+void *safe_queue_pop_front(safe_queue *sq);
+
+#endif