add mruby sources

src/pool.h

@@ -0,0 +1,19 @@
+#include "mruby.h"
+#include <stddef.h>
+
+typedef struct mrb_pool {
+  mrb_state *mrb;
+  struct mrb_pool_page {
+    struct mrb_pool_page *next;
+    size_t offset;
+    size_t len;
+    void *last;
+    char page[1];
+  } *pages;
+} mrb_pool;
+
+mrb_pool* mrb_pool_open(mrb_state*);
+void mrb_pool_close(mrb_pool*);
+void* mrb_pool_alloc(mrb_pool*, size_t);
+void* mrb_pool_realloc(mrb_pool*, void*, size_t oldlen, size_t newlen);
+int mrb_pool_can_realloc(mrb_pool*, void*, size_t);