#include "defs.h"
#include "frame-cache.h"

struct frame_cache_entry
{
  struct frame_id id;
  struct frame_info *frame;
};

/* The current implementation currently only caches one frame.  */
struct frame_cache_entry frame_cache;

void
frame_cache_add (struct frame_info *frame, struct frame_id id)
{
  frame_cache.id = id;
  frame_cache.frame = frame;
}

struct frame_info *
frame_cache_find (struct frame_id id)
{
  if (frame_id_eq (frame_cache.id, id))
    return frame_cache.frame;
  return NULL;
}

void frame_cache_invalidate (void)
{
  frame_cache.id = null_frame_id;
  frame_cache.frame = NULL;
}

/* Provide a prototype to silence -Wmissing-prototypes.  */
extern initialize_file_ftype _initialize_frame_cache;

void
_initialize_frame_cache (void)
{
  frame_cache.id = null_frame_id;
  frame_cache.frame = NULL;
}