geopm_hash.h

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/*
 * Copyright (c) 2015 - 2024 Intel Corporation
 * SPDX-License-Identifier: BSD-3-Clause
 */
#ifndef GEOPM_HASH_H_INCLUDE
#define GEOPM_HASH_H_INCLUDE
 
#include <stdint.h>
#include <string.h>
 
#include "geopm_public.h"
 
#ifdef __cplusplus
#include <string>
 
extern "C"
{
#endif
 
 
/***************************/
/* APPLICATION REGION HASH */
/***************************/
 
// NOTE: GEOPM_REGION_HASH_* values were derived by hashing the enum
// string with geopm_crc32_str().  Because the implementation of this
// hash function has changed, the value will not reproduce, but a
// similar process can be followed to add any new statically defined
// region hash values.
enum geopm_region_hash_e {
    GEOPM_REGION_HASH_INVALID  = 0x0ULL,
    GEOPM_REGION_HASH_UNMARKED = 0x725e8066ULL,
    GEOPM_U64_SENTINEL_REGION_HASH = UINT64_MAX, /* Force enum type to uint64_t */
};
 
enum geopm_region_hash_epoch_e {
    GEOPM_REGION_HASH_EPOCH = 0x66c91423ULL,
    GEOPM_REGION_HASH_APP = 0x9d540c53ULL,
};
 
 
uint64_t GEOPM_PUBLIC
    geopm_crc32_u64(uint64_t begin, uint64_t key);
 
uint64_t GEOPM_PUBLIC
    geopm_crc32_str(const char *key);
 
#ifdef __cplusplus
}
 
namespace geopm
{
    uint64_t GEOPM_PUBLIC
        hash(const std::string &key);
}
 
#endif
 
#endif