1 files changed, 54 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/data_channel_utils.cc b/third_party/libwebrtc/pc/data_channel_utils.cc
new file mode 100644
index 0000000000..a772241c3e
--- /dev/null
+++ b/third_party/libwebrtc/pc/data_channel_utils.cc
@@ -0,0 +1,54 @@
+/*
+ *  Copyright 2020 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "pc/data_channel_utils.h"
+
+#include <utility>
+
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+
+bool PacketQueue::Empty() const {
+  return packets_.empty();
+}
+
+std::unique_ptr<DataBuffer> PacketQueue::PopFront() {
+  RTC_DCHECK(!packets_.empty());
+  byte_count_ -= packets_.front()->size();
+  std::unique_ptr<DataBuffer> packet = std::move(packets_.front());
+  packets_.pop_front();
+  return packet;
+}
+
+void PacketQueue::PushFront(std::unique_ptr<DataBuffer> packet) {
+  byte_count_ += packet->size();
+  packets_.push_front(std::move(packet));
+}
+
+void PacketQueue::PushBack(std::unique_ptr<DataBuffer> packet) {
+  byte_count_ += packet->size();
+  packets_.push_back(std::move(packet));
+}
+
+void PacketQueue::Clear() {
+  packets_.clear();
+  byte_count_ = 0;
+}
+
+void PacketQueue::Swap(PacketQueue* other) {
+  size_t other_byte_count = other->byte_count_;
+  other->byte_count_ = byte_count_;
+  byte_count_ = other_byte_count;
+
+  other->packets_.swap(packets_);
+}
+
+}  // namespace webrtc