common/vsoc/lib/ril_region_view.cpp

/*
 * Copyright (C) 2017 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 <arpa/inet.h>

#include <mutex>

#include "common/vsoc/lib/ril_region_view.h"

namespace vsoc {
namespace ril {

// TODO(jemoreira): use the general region singleton implementation when ready
#if defined(CUTTLEFISH_HOST)
RilRegionView* RilRegionView::GetInstance(const char* domain) {
#else
RilRegionView* RilRegionView::GetInstance() {
#endif
  static std::mutex m;
  static RilRegionView* region;

  std::lock_guard<std::mutex> lock(m);
  if (!region) {
    region = new RilRegionView();

#if defined(CUTTLEFISH_HOST)
    if (!region->Open(domain)) {
#else
    if (!region->Open()) {
#endif
      delete region;
      region = nullptr;
    }
  }
  return region;
}

const char* RilRegionView::address_and_prefix_length() const {
  static char buffer[sizeof(data().ipaddr) + 3]{};  // <ipaddr>/dd
  if (buffer[0] == '\0') {
    snprintf(buffer, sizeof(buffer), "%s/%d", data().ipaddr, data().prefixlen);
  }
  return &buffer[0];
}

}  // namespace ril
}  // namespace vsoc