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#ifndef _HISTORY_H
#define _HISTORY_H
typedef struct _history_node {
list_head();
void *data;
time_t when;
} history_node;
typedef int (*history_compare_fn)(void *, void *);
typedef struct _history_info {
history_node *hist;
history_compare_fn compare_func;
time_t timeout;
size_t element_size;
} history_info_t;
history_info_t *history_init(history_compare_fn func,
time_t expiration, size_t element_size);
int history_check(history_info_t *hinfo, void *stuff);
int history_record(history_info_t *hinfo, void *data);
int history_wipe(history_info_t *hinfo);
#endif
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