# dkim_getcachestats()

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SYNOPSIS |
    #include <dkim.h>

    DKIM_STAT dkim_getcachestats(
                            DKIM_LIB *lib,
    			u_int *queries,
    			u_int *hits,
    			u_int *expired,
    			u_int *keys,
    			_Bool reset
    );
Retrieve libopendkim caching statistics.
DESCRIPTION |
Called When | `dkim_getcachestats()` can be called at any time.
ARGUMENTS |
Argument | Description
--- | ---
lib | A DKIM library handle as previously returned by a call to `dkim_init()`.
queries | Pointer to an unsigned integer which will receive the number of queries libopendkim has processed. This can be NULL if that datum is not of interest to the caller.
hits | Pointer to an unsigned integer which will receive the number of queries which were found in the cache being maintained by the library. This can be NULL if that datum is not of interest to the caller.
expired | Pointer to an unsigned integer which will receive the number of queries which were found in the cache but whose time-to-live value had expired and thus a re-query was required. This can be NULL if that datum is not of interest to the caller.
keys | Pointer to an unsigned integer which will receive the number of records present in the cache. Note that this includes records that have passed their time-to-live limits but have not yet been purged. This can be NULL if that datum is not of interest to the caller.
reset | If TRUE, the `queries`, `hits` and `expired` counters will be reset to 0. No change is made to cached data.
RETURN VALUES | DKIM_STAT_OK -- requested values returned DKIM_STAT_INVALID -- the cache has not yet been initialized DKIM_STAT_NOTIMPLEMENT -- library was not compiled with caching enabled
NOTES | Caching is enabled via the setting of the `DKIM_LIBFLAGS_CACHE` library option using the `dkim_options()` function. Caching must be enabled in the library at compile time since it establishes an extra library dependency.

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