macro LFDS711_RINGBUFFER_GET_USER_STATE_FROM_STATE

Source File

└───liblfds711
    └───inc
        └───liblfds711
                lfds711_ringbuffer.h

Opaque Structures

struct lfds711_ringbuffer_state;

Macro

#define LFDS711_RINGBUFFER_GET_USER_STATE_FROM_STATE( ringbuffer_state )

Parameters

ringbuffer_state

An initialized struct lfds711_ringbuffer_state. Not a pointer to it - the struct itself.

Return Value

Returns a void *, the user_state argument from lfds711_ringbuffer_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 <stdio.h>
#include "liblfds711.h"

int main()
{
  char
    ringbuffer_name[64] = "I Had a Dream, Joe";

  struct lfds711_ringbuffer_element
    re_array[16];

  struct lfds711_ringbuffer_state
    rs;

  void
    *user_state;

  lfds711_misc_library_init_valid_on_current_logical_core();

  lfds711_ringbuffer_init_valid_on_current_logical_core( &rs, re_array, 16, (void *) ringbuffer_name );

  user_state = LFDS711_RINGBUFFER_GET_USER_STATE_FROM_STATE( rs );

  printf( "ringbuffer name is \"%s\"\n", (char *) user_state );

  lfds711_ringbuffer_cleanup( &rs, NULL );

  lfds711_misc_library_cleanup();

  return( EXIT_SUCCESS );
}

See Also

• Ringbuffer