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#define DEFAULT_POOL_SIZE_BITS 32768
#define MAX_EVENT_BITS 11
typedef struct
{
double last_time;
double last_delta, last_delta2;
} event_state_t;
class pool
{
private:
unsigned char *entropy_pool, *entropy_pool_temp;
int pool_size_bytes;
unsigned char *ivec;
int ivec_size;
unsigned char *hash;
int hash_len;
int bits_in_pool;
event_state_t state;
bit_count_estimator *bce;
pthread_mutex_t lck;
pthread_cond_t cond;
void pool_init(pool_crypto *pc);
public:
pool(int new_pool_size_bytes, bit_count_estimator *bce, pool_crypto *pc);
pool(int pool_nr, FILE *fh, bit_count_estimator *bce, pool_crypto *pc);
~pool();
void dump(FILE *fh);
// this method returns a condition variable if this object
// was already(!) locked and NULL if it is was not locked
// and you're now the owner of the lock(!)
pthread_cond_t * lock_object();
pthread_cond_t * timed_lock_object(double max_time);
void unlock_object();
static int get_file_bit_count(std::string file_name);
/* -1 if not full, 0 if full */
int add_entropy_data(unsigned char *entropy_data, int n_bytes, pool_crypto *pc, int is_n_bits = -1);
/* returns number of bytes returned, set prng_ok to also return data when pool empty */
int get_entropy_data(unsigned char *entropy_data, int n_bytes_requested, bool prng_ok, pool_crypto *pc);
int get_get_size() const;
int get_get_size_in_bits() const;
int get_n_bits_in_pool() const;
int get_pool_size() const;
int get_pool_size_bytes() const;
unsigned char *expose_contents(); // resets bit count to zero
bool is_full() const;
bool is_almost_full() const;
int add_event(double ts, unsigned char *event_data, int n_event_data, pool_crypto *pc);
};
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