macro LFDS711_HASH_A_GET_USER_STATE_FROM_STATE
Jump to navigation
Jump to search
Source File
└───liblfds711
└───inc
└───liblfds711
lfds711_hash_addonly.h
Macro
#define LFDS711_HASH_A_GET_USER_STATE_FROM_STATE( hash_a_state )
Parameters
hash_a_state
- An initialized struct lfds711_hash_a_state. Not a pointer to it - the struct itself.
Return Value
Returns a void *, the user_state argument from lfds711_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 "liblfds711.h"
#include <stdio.h>
#include <string.h>
void key_hash_function( void const *key, lfds711_uint_t *hash )
{
assert( key != NULL );
assert( hash != NULL );
*hash = 0;
// TRD : assuming key is 16 bytes in length
LFDS711_HASH_A_HASH_FUNCTION( key, 16, *hash );
return;
}
int main()
{
char
hash_a_name[64] = "Fable Of The Brown Ape";
struct lfds711_btree_au_state
baus_array[16];
struct lfds711_hash_a_state
has;
void
*user_state;
lfds711_misc_init();
lfds711_hash_a_init_valid_on_current_logical_core( &has, baus_array, 16, strcmp, key_hash_fuction, LFDS711_HASH_A_EXISTING_KEY_OVERWRITE, (void *) hash_a_name );
user_state = LFDS711_HASH_A_GET_USER_STATE_FROM_STATE( has );
printf( "hash_a name is \"%s\"\n", (char *) user_state );
lfds711_hash_a_cleanup( &has, NULL );
lfds711_misc_cleanup();
return( EXIT_SUCCESS );
}