Initial in-process implementation of some Mojo primitives.

mojo/system/limits.h

+// Copyright 2013 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.
+
+#ifndef MOJO_SYSTEM_LIMITS_H_
+#define MOJO_SYSTEM_LIMITS_H_
+
+namespace mojo {
+namespace system {
+
+// Maximum of open (Mojo) handles.
+// TODO(vtl): This doesn't count "live" handles, some of which may live in
+// messages.
+const size_t kMaxHandleTableSize = 1000000;
+
+const size_t kMaxWaitManyNumHandles = kMaxHandleTableSize;
+
+const size_t kMaxMessageNumBytes = 4 * 1024 * 1024;
+
+const size_t kMaxMessageNumHandles = 10000;
+
+}  // namespace system
+}  // namespace mojo
+
+#endif  // MOJO_SYSTEM_LIMITS_H_