text: // SPDX-License-Identifier: Apache-2.0
  
  /*
   * Copyright 2020 Joel E. Anderson
   *
   * 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 <cstdlib>
  #include <gtest/gtest.h>
  #include <sstream>
  #include <stumpless.h>
  #include <thread>
  #include "test/helper/assert.hpp"
  
  namespace {
    const int THREAD_COUNT = 16;
    const int ITERATION_COUNT = 1000;
  
    void
    read_param( const struct stumpless_param *param ) {
      struct stumpless_param *copy;
      const char *name;
      const char *value;
      const char *str;
  
      for( int i = 0; i < ITERATION_COUNT; i++ ) {
        copy = stumpless_copy_param( param );
  
        name = stumpless_get_param_name( param );
        value = stumpless_get_param_value( param );
        str = stumpless_param_to_string( param );
  
        stumpless_destroy_param( copy );
        free( ( void * ) name );
        free( ( void * ) value );
        free( ( void * ) str );
      }
    }
  
    void
    write_param( struct stumpless_param *param ) {
      std::thread::id thread_id = std::this_thread::get_id(  );
  
      std::ostringstream name_stream;
      name_stream << "param-name-" << thread_id;
      std::string name( name_stream.str(  ) );
  
      std::ostringstream value_stream;
      value_stream << "param-value-" << thread_id;
      std::string value( value_stream.str(  ) );
  
      for( int i = 0; i < ITERATION_COUNT; i++ ) {
        stumpless_set_param_name( param, name.c_str(  ) );
        stumpless_set_param_value( param, value.c_str(  ) );
      }
    }
  
    TEST( ParamConsistency, SimultaneousReadsAndWrites ) {
      struct stumpless_param *param;
      int i;
      std::thread *reader_threads[THREAD_COUNT];
      std::thread *writer_threads[THREAD_COUNT];
  
      param = stumpless_new_param( "initial-name", "initial-value" );
      EXPECT_NO_ERROR;
      ASSERT_NOT_NULL( param );
  
      for( i = 0; i < THREAD_COUNT; i++ ) {
        reader_threads[i] = new std::thread( read_param, param );
        writer_threads[i] = new std::thread( write_param, param );
      }
  
      for( i = 0; i < THREAD_COUNT; i++ ) {
        reader_threads[i]->join(  );
        delete reader_threads[i];
        writer_threads[i]->join(  );
        delete writer_threads[i];
      }
  
      // cleanup after the test
      stumpless_destroy_param( param );
      stumpless_free_all(  );
    }
  }
  