#include <stdint.h>
#include <string.h>
#include "geopm_public.h"

Include dependency graph for geopm_hash.h:

This graph shows which files directly or indirectly include this file:

Enumerations
enum	geopm_region_hash_e { GEOPM_REGION_HASH_INVALID = 0x0ULL , GEOPM_REGION_HASH_UNMARKED = 0x725e8066ULL , GEOPM_U64_SENTINEL_REGION_HASH = UINT64_MAX }

enum	geopm_region_hash_epoch_e { GEOPM_REGION_HASH_EPOCH = 0x66c91423ULL , GEOPM_REGION_HASH_APP = 0x9d540c53ULL }
	Enum for internally defined region hashes. More...

Functions
uint64_t GEOPM_PUBLIC	geopm_crc32_u64 (uint64_t begin, uint64_t key)
	DEPRECATED Implements a hashing algorithm. More...

uint64_t GEOPM_PUBLIC	geopm_crc32_str (const char *key)
	This function is used to produce unique region IDs for named regions. More...

Enumeration Type Documentation

◆ geopm_region_hash_e

enum geopm_region_hash_e

Enumerator
GEOPM_REGION_HASH_INVALID
GEOPM_REGION_HASH_UNMARKED
GEOPM_U64_SENTINEL_REGION_HASH

◆ geopm_region_hash_epoch_e

enum geopm_region_hash_epoch_e

Enum for internally defined region hashes.

Enumerator
GEOPM_REGION_HASH_EPOCH
GEOPM_REGION_HASH_APP

Function Documentation

◆ geopm_crc32_str()

uint64_t GEOPM_PUBLIC geopm_crc32_str ( const char * key )

This function is used to produce unique region IDs for named regions.

An Agent implementation with specialized behavior for specific region names can use this function to figure out the region ID to expect for the desired region. Only the bottom 32 bits will be filled in, reserving the top 32 bits for hints and other information.

Parameters

[in] key This string is hashed to produce a 64-bit value.

Returns: uint64_t The result is returned as a 64-bit integer.

◆ geopm_crc32_u64()

uint64_t GEOPM_PUBLIC geopm_crc32_u64	(	uint64_t	begin,
		uint64_t	key
	)

DEPRECATED Implements a hashing algorithm.