#include <boost/interprocess/managed_shared_memory.hpp>
#include <cstdlib>
#define AudioServerShmemSize (16 * 1024 * 1024)

using namespace boost::interprocess;

class audio_server_shmem {
  private:
    audio_server_shmem(bool is_server) {
      if (is_server) {
        const char *size = std::getenv("AUDIO_SERVER_SHMEM_SIZE");
        int int_size = AudioServerShmemSize;
        if (size) {
          int_size = std::atoi(size);
          if (int_size <= 0) {
            int_size = AudioServerShmemSize;
          }
        }
        shm_ = new managed_shared_memory(open_or_create, "AudioServiceShmem", int_size);
      } else {
        shm_ = new managed_shared_memory(open_only, "AudioServiceShmem");
      }
    }
    ~audio_server_shmem() {
      delete shm_;
    }
    static managed_shared_memory *shm_;
  public:
    audio_server_shmem(const audio_server_shmem &) = delete;
    audio_server_shmem(audio_server_shmem &&) = delete;
    audio_server_shmem& operator=(const audio_server_shmem&) = delete;
    audio_server_shmem& operator=(audio_server_shmem&&) = delete;

    static managed_shared_memory * getInstance(bool is_server = false) {
      static audio_server_shmem instance(is_server);
      return shm_;
    }
};