sandbox/linux/bpf_dsl/bpf_dsl_impl.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef SANDBOX_LINUX_BPF_DSL_BPF_DSL_IMPL_H_
   6 #define SANDBOX_LINUX_BPF_DSL_BPF_DSL_IMPL_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "sandbox/sandbox_export.h"
  11
  12 namespace sandbox {
  13 class ErrorCode;
  14 class SandboxBPF;
  15
  16 namespace bpf_dsl {
  17 namespace internal {
  18
  19 // Internal interface implemented by BoolExpr implementations.
  20 class BoolExprImpl : public base::RefCounted<BoolExprImpl> {
  21  public:
  22   BoolExprImpl() {}
  23   virtual ErrorCode Compile(SandboxBPF* sb,
  24                             ErrorCode true_ec,
  25                             ErrorCode false_ec) const = 0;
  26
  27  protected:
  28   virtual ~BoolExprImpl() {}
  29
  30  private:
  31   friend class base::RefCounted<BoolExprImpl>;
  32   DISALLOW_COPY_AND_ASSIGN(BoolExprImpl);
  33 };
  34
  35 // Internal interface implemented by ResultExpr implementations.
  36 class ResultExprImpl : public base::RefCounted<ResultExprImpl> {
  37  public:
  38   ResultExprImpl() {}
  39   virtual ErrorCode Compile(SandboxBPF* sb) const = 0;
  40   virtual bool HasUnsafeTraps() const;
  41
  42  protected:
  43   virtual ~ResultExprImpl() {}
  44
  45  private:
  46   friend class base::RefCounted<ResultExprImpl>;
  47   DISALLOW_COPY_AND_ASSIGN(ResultExprImpl);
  48 };
  49
  50 }  // namespace internal
  51 }  // namespace bpf_dsl
  52 }  // namespace sandbox
  53
  54 #endif  // SANDBOX_LINUX_BPF_DSL_BPF_DSL_IMPL_H_