Linux Sandbox: add resource limits to NaCl

sandbox/linux/services/resource_limits.h

Index: sandbox/linux/services/resource_limits.h
diff --git a/sandbox/linux/services/resource_limits.h b/sandbox/linux/services/resource_limits.h
new file mode 100644
index 0000000000000000000000000000000000000000..488a5c57aeb0a1c34f4104065e484197bf5a3917
--- /dev/null
+++ b/sandbox/linux/services/resource_limits.h
@@ -0,0 +1,30 @@
+// Copyright 2015 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 SANDBOX_LINUX_SERVICES_RESOURCE_LIMITS_H_
+#define SANDBOX_LINUX_SERVICES_RESOURCE_LIMITS_H_
+
+#include <sys/resource.h>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "sandbox/sandbox_export.h"
+
+namespace sandbox {
+
+// This class provides a small wrapper around setrlimit().
+class SANDBOX_EXPORT ResourceLimits {
+ public:
+  // Lower the soft and hard limit of |resource| to |limit|. If the current
+  // limit is lower than |limit|, keep it.
+  static bool Lower(int resource, rlim_t limit) WARN_UNUSED_RESULT;
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(ResourceLimits);
+};
+
+}  // namespace sandbox
+
+#endif  // SANDBOX_LINUX_SERVICES_RESOURCE_LIMITS_H_