typedef struct wordCount {
    struct wordCount *self;
    int size;             // remaining file size
    int division_size;    // for each word count task
    int division_out_size;
    int out_size;
    int task_num;         // remaining task count
    int task_blocks;      // spawn task one at a time
    int status_num;
    int task_spwaned;
    unsigned long long *o_data;
    int out_task_num;
    char *file_mmap;
    int file_size;
    int last_task_size;
    unsigned char *search_word;
    int search_word_len;
    int extra_len;
    HTaskPtr t_print;
} WordCount;