macro LFDS710_HASH_A_GET_USER_STATE_FROM_STATE
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Source File
└───liblfds710
└───inc
└───liblfds710
lfds710_hash_addonly.h
Macro
#define LFDS710_HASH_A_GET_USER_STATE_FROM_STATE( hash_a_state )
Parameters
hash_a_state
- An initialized struct lfds710_hash_a_state. Not a pointer to it - the struct itself.
Return Value
Returns a void *, the user_state argument from lfds710_hash_a_init_valid_on_current_logical_core.
Notes
The user state value can only be set the once, when the data structure instance is initialized.
As with all liblfds macros, the macro operates on the structure itself, not a pointer to it.
Example
#include "liblfds710.h"
#include <stdio.h>
#include <string.h>
void key_hash_function( void const *key, lfds710_uint_t *hash )
{
assert( key != NULL );
assert( hash != NULL );
*hash = 0;
// TRD : assuming key is 16 bytes in length
LFDS710_HASH_A_HASH_FUNCTION( key, 16, *hash );
return;
}
int main()
{
char
hash_a_name[64] = "Fable Of The Brown Ape";
struct lfds710_btree_au_state
baus_array[16];
struct lfds710_hash_a_state
has;
void
*user_state;
lfds710_misc_init();
lfds710_hash_a_init_valid_on_current_logical_core( &has, baus_array, 16, strcmp, key_hash_fuction, LFDS710_HASH_A_EXISTING_KEY_OVERWRITE, (void *) hash_a_name );
user_state = LFDS710_HASH_A_GET_USER_STATE_FROM_STATE( has );
printf( "hash_a name is \"%s\"\n", (char *) user_state );
lfds710_hash_a_cleanup( &has, NULL );
lfds710_misc_cleanup();
return( EXIT_SUCCESS );
}