--- a/src/core/ngx_slab.c
+++ b/src/core/ngx_slab.c
@@ -4,8 +4,41 @@
  */
 
 
+typedef struct ngx_slab_map_s  ngx_slab_map_t;
 
-void *ngx_slab_alloc(ngx_slab_pool_t *pool, size_t size)
+struct ngx_http_slab_map_s {
+    uintptr_t        mask;
+    ngx_slab_elt_t  *next;
+};
+
+
+typedef struct {
+    ngx_slab_elt_t  *slabs;
+
+    ngx_slab_elt_t  *map;
+    size_t           map_size;
+
+    size_t           size;
+
+} ngx_slab_t;
+
+
+void *
+ngx_slab_init(ngx_slab_pool_t *pool, size_t size)
 {
-   return NULL;
+    slab->map_size = (slab->size + ngx_pagesize - 1)
+                          / (ngx_pagesize / sizeof(ngx_slab_map_t));
+
+
+    return NULL;
 }
+
+
+void *
+ngx_slab_alloc(ngx_slab_t *pool, size_t size)
+{
+    n = size - 1;
+
+
+    return NULL;
+}