new file mode 100644
--- /dev/null
+++ b/src/core/ngx_alloc.h
@@ -0,0 +1,42 @@
+#ifndef _NGX_ALLOC_H_INCLUDED_
+#define _NGX_ALLOC_H_INCLUDED_
+
+
+#include <ngx_config.h>
+
+#include <ngx_log.h>
+
+
+#define NGX_MAX_ALLOC_FROM_POOL (8192 - sizeof(ngx_pool_t))
+#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);
+
+
+#endif /* _NGX_ALLOC_H_INCLUDED_ */