ssp_items.h File Reference

Item abstraction. More...

#include <apr.h>

Go to the source code of this file.

Typedefs
typedef apr_uint32_t(	ssp_hash_function_t )(void *item)
	Signature for user provided hash functions.

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Detailed Description

Item abstraction.

The bloom filter and counter work on sets or streams of items. Items are represented by data of type void * and the only operation on those are hash functions.

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Typedef Documentation

typedef apr_uint32_t( ssp_hash_function_t)(void *item)

Signature for user provided hash functions. The type ssp_hash_function_t defines the signature of of the two hash functions the user must provide on his items. They take a items, represented by a void * pointer, and return up to 32 bits of psuedo random hash derived from the item. If fewer bits are needed in the filter/counters you instantiate only the low order bits are used. Of course, in that scenario the user's hash functions need not create more hash bits.

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