diff --git a/src/core/ngx_palloc.h b/src/core/ngx_palloc.h
new file mode 100644
index 0000000..7774d35
--- /dev/null
+++ b/src/core/ngx_palloc.h
@@ -0,0 +1,51 @@
+#ifndef _NGX_PALLOC_H_INCLUDED_
+#define _NGX_PALLOC_H_INCLUDED_
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+/*
+ * NGX_MAX_ALLOC_FROM_POOL should be (ngx_page_size - 1), i.e. 4095 on x86.
+ * On FreeBSD 5.x it allows to use zero copy send.
+ * On Windows NT it decreases a number of locked pages in a kernel.
+ */
+#define NGX_MAX_ALLOC_FROM_POOL  (ngx_pagesize - 1)
+
+#define NGX_DEFAULT_POOL_SIZE   (16 * 1024)
+
+#define ngx_test_null(p, alloc, rc)  if ((p = alloc) == NULL) { return rc; }
+
+
+typedef struct ngx_pool_large_s  ngx_pool_large_t;
+
+struct ngx_pool_large_s {
+    ngx_pool_large_t  *next;
+    void              *alloc;
+};
+
+
+typedef struct ngx_pool_s        ngx_pool_t;
+
+struct ngx_pool_s {
+    char              *last;
+    char              *end;
+    ngx_pool_t        *next;
+    ngx_pool_large_t  *large;
+    ngx_log_t         *log;
+};
+
+
+void *ngx_alloc(size_t size, ngx_log_t *log);
+void *ngx_calloc(size_t size, ngx_log_t *log);
+
+ngx_pool_t *ngx_create_pool(size_t size, ngx_log_t *log);
+void ngx_destroy_pool(ngx_pool_t *pool);
+
+void *ngx_palloc(ngx_pool_t *pool, size_t size);
+void *ngx_pcalloc(ngx_pool_t *pool, size_t size);
+void ngx_pfree(ngx_pool_t *pool, void *p);
+
+
+#endif /* _NGX_PALLOC_H_INCLUDED_ */