1 files changed, 41 insertions, 0 deletions
diff --git a/ipc/glue/SharedMemory_windows.cpp b/ipc/glue/SharedMemory_windows.cpp
new file mode 100644
index 0000000000..1cc93687af
--- /dev/null
+++ b/ipc/glue/SharedMemory_windows.cpp
@@ -0,0 +1,41 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <windows.h>
+
+#include "mozilla/ipc/SharedMemory.h"
+
+namespace mozilla {
+namespace ipc {
+
+void SharedMemory::SystemProtect(char* aAddr, size_t aSize, int aRights) {
+  if (!SystemProtectFallible(aAddr, aSize, aRights)) {
+    MOZ_CRASH("can't VirtualProtect()");
+  }
+}
+
+bool SharedMemory::SystemProtectFallible(char* aAddr, size_t aSize,
+                                         int aRights) {
+  DWORD flags;
+  if ((aRights & RightsRead) && (aRights & RightsWrite))
+    flags = PAGE_READWRITE;
+  else if (aRights & RightsRead)
+    flags = PAGE_READONLY;
+  else
+    flags = PAGE_NOACCESS;
+
+  DWORD oldflags;
+  return VirtualProtect(aAddr, aSize, flags, &oldflags);
+}
+
+size_t SharedMemory::SystemPageSize() {
+  SYSTEM_INFO si;
+  GetSystemInfo(&si);
+  return si.dwPageSize;
+}
+
+}  // namespace ipc
+}  // namespace mozilla