Branch the files in the shim layer that switches between the

memory allocation implementations (tcmalloc, jemalloc, etc.) into a
base\allocator library.
BUG=27911
TEST=none
Review URL: http://codereview.chromium.org/434067

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@33043 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 50 insertions, 0 deletions

diff --git a/base/allocator/win_allocator.cc b/base/allocator/win_allocator.cc
new file mode 100644
index 0000000..8ae653a
--- /dev/null
+++ b/base/allocator/win_allocator.cc
@@ -0,0 +1,50 @@
+// 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 size) {
+  return HeapAlloc(win_heap, 0, size);
+}
+
+void win_heap_free(void* size) {
+  HeapFree(win_heap, 0, size);
+}
+
+void* win_heap_realloc(void* ptr, size_t size) {
+  if (!ptr)
+    return win_heap_malloc(size);
+  if (!size) {
+    win_heap_free(ptr);
+    return NULL;
+  }
+  return HeapReAlloc(win_heap, 0, ptr, size);
+}
+
+size_t win_heap_msize(void* ptr) {
+  return HeapSize(win_heap, 0, ptr);
+}
+
+}  // extern "C"