text: /**
   * Copyright (C) 2015 MongoDB Inc.
   *
   * This program is free software: you can redistribute it and/or  modify
   * it under the terms of the GNU Affero General Public License, version 3,
   * as published by the Free Software Foundation.
   *
   * This program 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 Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   *
   * As a special exception, the copyright holders give permission to link the
   * code of portions of this program with the OpenSSL library under certain
   * conditions as described in each individual source file and distribute
   * linked combinations including the program with the OpenSSL library. You
   * must comply with the GNU Affero General Public License in all respects
   * for all of the code used other than as permitted herein. If you modify
   * file(s) with this exception, you may extend this exception to your
   * version of the file(s), but you are not obligated to do so. If you do not
   * wish to do so, delete this exception statement from your version. If you
   * delete this exception statement from all source files in the program,
   * then also delete it in the license file.
   */
  
  #define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kQuery
  
  #include "mongo/platform/basic.h"
  
  #include "mongo/scripting/mozjs/cursor_handle.h"
  
  #include "mongo/scripting/mozjs/implscope.h"
  #include "mongo/scripting/mozjs/wrapconstrainedmethod.h"
  #include "mongo/util/log.h"
  
  namespace mongo {
  namespace mozjs {
  
  const JSFunctionSpec CursorHandleInfo::methods[2] = {
      MONGO_ATTACH_JS_CONSTRAINED_METHOD_NO_PROTO(zeroCursorId, CursorHandleInfo), JS_FS_END,
  };
  
  const char* const CursorHandleInfo::className = "CursorHandle";
  
  namespace {
  
  long long* getCursorId(JSObject* thisv) {
      CursorHandleInfo::CursorTracker* tracker =
          static_cast<CursorHandleInfo::CursorTracker*>(JS_GetPrivate(thisv));
      if (tracker) {
          return &tracker->cursorId;
      }
  
      return nullptr;
  }
  
  long long* getCursorId(JS::CallArgs& args) {
      return getCursorId(args.thisv().toObjectOrNull());
  }
  
  }  // namespace
  
  void CursorHandleInfo::finalize(JSFreeOp* fop, JSObject* obj) {
      auto cursorTracker = static_cast<CursorHandleInfo::CursorTracker*>(JS_GetPrivate(obj));
      if (cursorTracker) {
          const long long cursorId = cursorTracker->cursorId;
          if (cursorId) {
              try {
                  cursorTracker->client->killCursor(cursorTracker->ns, cursorId);
              } catch (...) {
                  auto status = exceptionToStatus();
  
                  try {
                      LOG(0) << "Failed to kill cursor " << cursorId << " due to " << status;
                  } catch (...) {
                      // This is here in case logging fails.
                  }
              }
          }
  
          getScope(fop)->trackedDelete(cursorTracker);
      }
  }
  
  void CursorHandleInfo::Functions::zeroCursorId::call(JSContext* cx, JS::CallArgs args) {
      long long* cursorId = getCursorId(args);
      if (cursorId) {
          *cursorId = 0;
      }
  }
  
  }  // namespace mozjs
  }  // namespace mongo
  