1 files changed, 16 insertions, 3 deletions

diff --git a/C/Alloc.h b/C/Alloc.h
index 3be2041..fac5b62 100644
--- a/C/Alloc.h
+++ b/C/Alloc.h
@@ -1,19 +1,32 @@
 /* Alloc.h -- Memory allocation functions
-2021-07-13 : Igor Pavlov : Public domain */
+2023-03-04 : Igor Pavlov : Public domain */
 
-#ifndef __COMMON_ALLOC_H
-#define __COMMON_ALLOC_H
+#ifndef ZIP7_INC_ALLOC_H
+#define ZIP7_INC_ALLOC_H
 
 #include "7zTypes.h"
 
 EXTERN_C_BEGIN
 
+/*
+  MyFree(NULL)        : is allowed, as free(NULL)
+  MyAlloc(0)          : returns NULL : but malloc(0)        is allowed to return NULL or non_NULL
+  MyRealloc(NULL, 0)  : returns NULL : but realloc(NULL, 0) is allowed to return NULL or non_NULL
+MyRealloc() is similar to realloc() for the following cases:
+  MyRealloc(non_NULL, 0)         : returns NULL and always calls MyFree(ptr)
+  MyRealloc(NULL, non_ZERO)      : returns NULL, if allocation failed
+  MyRealloc(non_NULL, non_ZERO)  : returns NULL, if reallocation failed
+*/
+
 void *MyAlloc(size_t size);
 void MyFree(void *address);
+void *MyRealloc(void *address, size_t size);
 
 #ifdef _WIN32
 
+#ifdef Z7_LARGE_PAGES
 void SetLargePageSize(void);
+#endif
 
 void *MidAlloc(size_t size);
 void MidFree(void *address);