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NAME
     ck_hs_fas -- fetch and store key in hash set

LIBRARY
     Concurrency Kit (libck, -lck)

SYNOPSIS
     #include <ck_hs.h>

     bool
     ck_hs_fas(ck_hs_t *hs, unsigned long hash, const void *key,
	 void **previous);

DESCRIPTION
     The ck_hs_fas(3) function will fetch and store the key specified by the key
     argument  in  the hash set pointed to by the hs argument. The key specified
     by key is expected to have the hash value specified by  the  hash	argument
     (which was previously generated using the CK_HS_HASH(3) macro).

     If  the  call  to ck_hs_fas(3) was successful then the key specified by key
     was successfully stored in the hash set pointed to by hs.	The key must al-
     ready exist in the hash set, and is replaced by key and the previous  value
     is stored into the void pointer pointed to by the previous argument. If the
     key  does not exist in the hash set then the function will return false and
     the hash set is unchanged. This function is guaranteed to	be  stable  with
     respect to memory usage.

RETURN VALUES
     Upon successful completion, ck_hs_fas(3) returns true and otherwise returns
     false on failure.

ERRORS
     Behavior is undefined if key or hs are uninitialized.

SEE ALSO
     ck_hs_init(3), ck_hs_move(3), ck_hs_destroy(3), CK_HS_HASH(3), ck_hs_itera-
     tor_init(3),	 ck_hs_next(3),        ck_hs_get(3),	   ck_hs_put(3),
     ck_hs_put_unique(3),  ck_hs_remove(3),   ck_hs_grow(3),   ck_hs_rebuild(3),
     ck_hs_gc(3),     ck_hs_count(3),	 ck_hs_reset(3),    ck_hs_reset_size(3),
     ck_hs_stat(3)

     Additional information available at http://concurrencykit.org/

				  June 20, 2013 		    CK_HS_FAS(3)

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