Major changes to the Chrome allocator....

third_party/tcmalloc/win_allocator.cc

+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This is a simple allocator based on the windows heap.
+
+extern "C" {
+
+HANDLE win_heap;
+
+bool win_heap_init(bool use_lfh) {
+  win_heap = HeapCreate(0, 0, 0);
+  if (win_heap == NULL)
+    return false;
+
+  if (use_lfh) {
+    ULONG enable_lfh = 2;
+    HeapSetInformation(win_heap, HeapCompatibilityInformation,
+                       &enable_lfh, sizeof(enable_lfh));
+    // NOTE: Setting LFH may fail.  Vista already has it enabled.
+    //       And under the debugger, it won't use LFH.  So we
+    //       ignore any errors.
+  }
+
+  return true;
+}
+
+void* win_heap_malloc(size_t s) {
+  return HeapAlloc(win_heap, 0, s);
+}
+
+void* win_heap_realloc(void* p, size_t s) {
+  if (!p)
+    return win_heap_malloc(s);
+  return HeapReAlloc(win_heap, 0, p, s);
+}
+
+void win_heap_free(void* s) {
+  HeapFree(win_heap, 0, s);
+}
+
+size_t win_heap_msize(void* p) {
+  return HeapSize(win_heap, 0, p);
+}
+
+}  // extern "C"