// Copyright 2023 Google LLC
//
// 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
//
//     https://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 "internal/weave/packet_sequence_number_generator.h"

#include "internal/platform/mutex_lock.h"
#include "internal/weave/packet.h"

namespace nearby {
namespace weave {

int PacketSequenceNumberGenerator::Next() {
  MutexLock lock(&mutex_);
  int next_packet_counter = packet_counter_;
  if (next_packet_counter == Packet::kMaxPacketCounter) {
    packet_counter_ = 0;
  } else {
    ++packet_counter_;
  }
  return next_packet_counter;
}

void PacketSequenceNumberGenerator::Reset() {
  MutexLock lock(&mutex_);
  packet_counter_ = 0;
}
}  // namespace weave
}  // namespace nearby