From db960a8bba81df3217660ec5a96d73e0d6baa01b Mon Sep 17 00:00:00 2001
From: Kenneth Heafield <github@kheafield.com>
Date: Wed, 24 Apr 2013 10:12:41 +0100
Subject: KenLM 0831569c3137536165b107c6841603c725dfa2b1

---
 klm/util/scoped.cc | 28 +++++++++++++++++++++-------
 1 file changed, 21 insertions(+), 7 deletions(-)

(limited to 'klm/util/scoped.cc')

diff --git a/klm/util/scoped.cc b/klm/util/scoped.cc
index e7066ee4..6c5b0c2d 100644
--- a/klm/util/scoped.cc
+++ b/klm/util/scoped.cc
@@ -1,6 +1,9 @@
 #include "util/scoped.hh"
 
 #include <cstdlib>
+#if !defined(_WIN32) && !defined(_WIN64)
+#include <sys/mman.h>
+#endif
 
 namespace util {
 
@@ -10,20 +13,31 @@ MallocException::MallocException(std::size_t requested) throw() {
 
 MallocException::~MallocException() throw() {}
 
+namespace {
+void *InspectAddr(void *addr, std::size_t requested, const char *func_name) {
+  UTIL_THROW_IF_ARG(!addr && requested, MallocException, (requested), "in " << func_name);
+  // These routines are often used for large chunks of memory where huge pages help.
+#if MADV_HUGEPAGE
+  madvise(addr, requested, MADV_HUGEPAGE);
+#endif
+  return addr;
+}
+} // namespace
+
 void *MallocOrThrow(std::size_t requested) {
-  void *ret;
-  UTIL_THROW_IF_ARG(!(ret = std::malloc(requested)), MallocException, (requested), "in malloc");
-  return ret;
+  return InspectAddr(std::malloc(requested), requested, "malloc");
+}
+
+void *CallocOrThrow(std::size_t requested) {
+  return InspectAddr(std::calloc(1, requested), requested, "calloc");
 }
 
 scoped_malloc::~scoped_malloc() {
   std::free(p_);
 }
 
-void scoped_malloc::call_realloc(std::size_t to) {
-  void *ret;
-  UTIL_THROW_IF_ARG(!(ret = std::realloc(p_, to)) && to, MallocException, (to), "in realloc");
-  p_ = ret;
+void scoped_malloc::call_realloc(std::size_t requested) {
+  p_ = InspectAddr(std::realloc(p_, requested), requested, "realloc");
 }
 
 } // namespace util
-- 
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