macro LFDS710_FREELIST_GET_VALUE_FROM_ELEMENT

Source Files

└───liblfds710
    └───inc
        └───liblfds710
                lfds710_freelist.h

Opaque Structures

struct lfds710_freelist_element;

Macro

#define LFDS710_FREELIST_GET_VALUE_FROM_ELEMENT( freelist_element )

Parameters

freelist_element

A struct lfds710_freelist_element. Not a pointer to it - the struct itself.

Return Value

Returns a void pointer, the value from the element.

Notes

The value set into a freelist element is only guranteed to be visible to another logical core once the element has been popped by a thread running on that logical core.

So, for example, if there was a globally allocated freelist element, where a thread on logical core A set a value and then pushed the element to the freelist, a thread on logical core B would only be guaranteed to see the value set by the other thread once it pops the element from the freelist.

As with all liblfds macros, the macro operates on the structure itself, not a pointer to it.

Example

#include <stdio.h>
#include "liblfds710.h"

int main()
{
  char
    freelist_element_name[64] = "Thucydides",
    *freelist_element_name_temp;

  struct lfds710_misc_prng_state
    ps;

  struct lfds710_freelist_element
    fe,
    *fe_temp;

  struct lfds710_freelist_state
    fs;

  lfds710_misc_library_init_valid_on_current_logical_core();
 
  lfds710_misc_prng_init( &ps );

  lfds710_freelist_init_valid_on_current_logical_core( &fs, NULL );

  LFDS710_FREELIST_SET_VALUE_IN_ELEMENT( &fe, (void *) freelist_element_name );

  lfds710_freelist_push( &fs, &fe, &ps );

  lfds710_freelist_pop( &fs, &fe_temp, &ps );

  freelist_element_name_temp = (char *) LFDS710_FREELIST_GET_VALUE_FROM_ELEMENT( *fs_temp );

  printf( "freelist element name is \"%s\"\n", (char *) freelist_element_name_temp );

  lfds710_freelist_cleanup( &fs, NULL );

  lfds710_misc_library_cleanup();

  return( EXIT_SUCCESS );
}

macro LFDS710_FREELIST_GET_VALUE_FROM_ELEMENT

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