c++ reinterpret_cast

typedef void* BREAKPAD_HANDLE;

extern "C" BREAKPAD_HANDLE initialize_breakpad(char const* dump_path)
{
    google_breakpad::MinidumpDescriptor descriptor(dump_path);
    auto handler = new google_breakpad::ExceptionHandler(
        descriptor,
        nullptr, // Callback before starting the minidump.
        dump_callback, // Callback after writing the minidump.
        nullptr, // Callback context.
        true, // Write a minidump for any unhandled exception.
        -1); // Write minidumps in-process, for simplicity.
    return reinterpret_cast<BREAKPAD_HANDLE>(handler);
}