BIRD library: The story continues.

Complete resource manages and IP address handling.

1 files changed, 87 insertions, 0 deletions

diff --git a/lib/slab.c b/lib/slab.c
new file mode 100644
index 0000000..e71c7de
--- /dev/null
+++ b/lib/slab.c
@@ -0,0 +1,87 @@
+/*
+ *	BIRD Resource Manager -- SLABs
+ *
+ *	(c) 1998 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "nest/bird.h"
+#include "lib/resource.h"
+
+/*
+ *	These are only fake, soon to change...
+ */
+
+struct sl_obj {
+  node n;
+  byte data[0];
+};
+
+struct slab {
+  resource r;
+  unsigned size;
+  list objs;
+};
+
+void slab_free(resource *r);
+void slab_dump(resource *r);
+
+struct resclass sl_class = {
+  "Slab",
+  sizeof(struct slab),
+  slab_free,
+  slab_dump
+};
+
+slab *
+sl_new(pool *p, unsigned size)
+{
+  slab *s = ralloc(p, &sl_class);
+  s->size = size;
+  init_list(&s->objs);
+  return s;
+}
+
+void *
+sl_alloc(slab *s)
+{
+  struct sl_obj *o = xmalloc(sizeof(struct sl_obj) + s->size);
+
+  add_tail(&s->objs, &o->n);
+  return o->data;
+}
+
+void
+sl_free(slab *s, void *oo)
+{
+  struct sl_obj *o = SKIP_BACK(struct sl_obj, data, oo);
+
+  rem_node(&o->n);
+  xfree(o);
+}
+
+void
+slab_free(resource *r)
+{
+  slab *s = (slab *) r;
+  struct sl_obj *o, *p;
+
+  for(o = HEAD(s->objs); p = (struct sl_obj *) o->n.next; o = p)
+    xfree(o);
+}
+
+void
+slab_dump(resource *r)
+{
+  slab *s = (slab *) r;
+  int cnt = 0;
+  struct sl_obj *o;
+
+  WALK_LIST(o, s->objs)
+    cnt++;
+  debug("(%d objects per %d bytes)\n", cnt, s->size);
+}