cromo/hooktable.h

// Copyright (c) 2010 The Chromium OS 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 CROMO_HOOKTABLE_H_
#define CROMO_HOOKTABLE_H_

#include <map>
#include <string>

class HookTable {
 public:
  typedef bool (*Function)(void*);

  HookTable();
  ~HookTable();

  void Add(const std::string &name, Function func, void* arg);

  // Removes a hook from this table by name. The specified hook must exist in
  // the table.
  void Del(const std::string& name);

  // Executes all the hooks in the table in an undefined order. Returns
  // whether all hooks completed successfully. Hooks indicate success by
  // returning true and failure by returning false.
  bool Run();

 private:
  struct Hook {
    Hook(Function func, void* arg);
    ~Hook();
    bool (*func_)(void* arg);
    void* arg_;
  };
  typedef std::map<const std::string, Hook*> HookMap;
  HookMap hooks_;
};

#endif  // CROMO_HOOKTABLE_H_