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MEMCACHED_GENERATE_HASH(3) libmemcached-awesome MEMCACHED_GENERATE_HASH(3)

NAME

memcached_generate_hash - Generating hash values directly

Hash a key value

SYNOPSIS

#include <libmemcached/memcached.h>
Compile and link with -lmemcachedutil -lmemcached

  • key -- the key to generate a hash of
  • key_length -- the length of the key without any terminating zero
  • hash_algorithm -- memcached_hash_t, the algorithm to use

a 32 bit hash value


  • ptr -- pointer to an initialized memcached_st <#_CPPv412memcached_st> struct
  • key -- the key to generate a hash of
  • key_length -- the length of the key without any terminating zero

a 32 bit hash value
















DESCRIPTION

memcached_generate_hash_value() allows you to hash a key using one of the hash functions defined in the library. This method is provided for the convenience of higher-level language bindings and is not necessary for normal memcache operations.

Support for MEMCACHED_HASH_HSIEH is a compile time option that is disabled by default. To enable tests for this hashing algorithm, configure and build libmemcached with the Hsieh hash enabled.

memcached_generate_hash() takes a memcached_st <#_CPPv412memcached_st> structure and produces the hash value that would have been generated based on the defaults of memcached_st <#_CPPv412memcached_st>.

As of version 0.36 all hash methods have been placed into the library libhashkit(3) which is linked with libmemcached(3). For more information please see its documentation.

RETURN VALUE

A 32-bit integer which is the result of hashing the given key. For 64-bit hash algorithms, only the least-significant 32 bits are returned.

SEE ALSO

memcached(1) <https://linux.die.net/man/1/memcached> libmemcached(3) <https://linux.die.net/man/3/libmemcached> memcached_strerror(3) <https://linux.die.net/man/3/memcached_strerror>

January 17, 2026 1.1