From 508a38a7fa572572869e7730f6c50957d59ff38d Mon Sep 17 00:00:00 2001
From: Yaser Afshar <ya.afshar@gmail.com>
Date: Wed, 15 Jul 2020 17:49:49 -0500
Subject: [PATCH] Fix the system-dependent function call to
 `malloc_usable_size`.

Fix the system-dependent function call to get the size of the
block of memory allocated from the heap.
---
 src/memory.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/memory.cpp b/src/memory.cpp
index 873bc754c0..6211687a7a 100644
--- a/src/memory.cpp
+++ b/src/memory.cpp
@@ -22,9 +22,13 @@
 #include "tbb/scalable_allocator.h"
 #else
 #include <cstring>
+#if defined(__APPLE__)
+#include <malloc/malloc.h>
+#else
 #include <malloc.h>
 #endif
 #endif
+#endif
 
 #if defined(LMP_USER_INTEL) && !defined(LAMMPS_MEMALIGN) && !defined(_WIN32)
 #define LAMMPS_MEMALIGN 64
@@ -84,7 +88,13 @@ void *Memory::srealloc(void *ptr, bigint nbytes, const char *name)
   if (offset) {
     void *optr = ptr;
     ptr = smalloc(nbytes, name);
+#if defined(__APPLE__)
+    memcpy(ptr, optr, MIN(nbytes,malloc_size(optr)));
+#elif defined(_WIN32) || defined(__MINGW32__)
+    memcpy(ptr, optr, MIN(nbytes,_msize(optr)));
+#else
     memcpy(ptr, optr, MIN(nbytes,malloc_usable_size(optr)));
+#endif
     free(optr);
   }
 #else