SECCOMP-BPF: Refactor the BPF sandbox API to use fewer "static" fields and methods.

sandbox/linux/seccomp-bpf/port.h

+// Copyright (c) 2012 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.
+
+// Commonly used macro definitions to make the code build in different
+// target environments (e.g. as part of Chrome vs. stand-alone)
+
+#ifndef SANDBOX_LINUX_SECCOMP_BPF_PORT_H__
+#define SANDBOX_LINUX_SECCOMP_BPF_PORT_H__
+
+#if !defined(SECCOMP_BPF_STANDALONE)
+  #include "base/basictypes.h"
+  #include "base/logging.h"
+  #include "base/posix/eintr_wrapper.h"
+#else
+  #define arraysize(x) (sizeof(x)/sizeof(*(x)))
+
+  #define HANDLE_EINTR TEMP_FAILURE_RETRY
+
+  #define DISALLOW_COPY_AND_ASSIGN(TypeName)       \
+    TypeName(const TypeName&);                     \
+    void operator=(const TypeName&)
+
+  #define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
+    TypeName();                                    \
+    DISALLOW_COPY_AND_ASSIGN(TypeName)
+
+  template <bool>
+  struct CompileAssert {
+  };
+
+  #define COMPILE_ASSERT(expr, msg) \
+    typedef CompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1]
+#endif
+
+#endif  // SANDBOX_LINUX_SECCOMP_BPF_PORT_H__