1    :  // Copyright 2015 Google Inc. All Rights Reserved.
   2    :  //
   3    :  // Licensed under the Apache License, Version 2.0 (the "License");
   4    :  // you may not use this file except in compliance with the License.
   5    :  // You may obtain a copy of the License at
   6    :  //
   7    :  //     http://www.apache.org/licenses/LICENSE-2.0
   8    :  //
   9    :  // Unless required by applicable law or agreed to in writing, software
  10    :  // distributed under the License is distributed on an "AS IS" BASIS,
  11    :  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12    :  // See the License for the specific language governing permissions and
  13    :  // limitations under the License.
  14    :  //
  15    :  // Declares a template class for handling conversions from trace file
  16    :  // pointers to live pointers.
  17    :  #ifndef SYZYGY_BARD_TRACE_LIVE_MAP_H_
  18    :  #define SYZYGY_BARD_TRACE_LIVE_MAP_H_
  19    :  
  20    :  #include <map>
  21    :  
  22    :  #include "base/synchronization/lock.h"
  23    :  
  24  m :  namespace bard {
  25    :  
  26    :  // A template class that holds a bidirectional map, for handling conversions
  27    :  // from trace file pointers to live pointers, since the addresses for the
  28    :  // live ones are not the same.
  29    :  // This class is thread safe for simultaneous access accross multiple threads.
  30    :  // @tparam T The type of object that the class is mapping.
  31  m :  template <typename T>
  32  m :  class TraceLiveMap {
  33  m :   public:
  34  m :    bool AddMapping(T trace, T live);
  35  m :    bool RemoveMapping(T trace, T live);
  36    :  
  37  m :    bool GetLiveFromTrace(T trace, T* live);
  38  m :    bool GetTraceFromLive(T live, T* trace);
  39    :  
  40  m :   private:
  41  m :    std::map<T, T> trace_live_;
  42  m :    std::map<T, T> live_trace_;
  43    :  
  44  m :    base::Lock lock_;
  45  m :  };
  46    :  
  47  m :  }  // namespace bard
  48    :  
  49    :  #include "syzygy/bard/trace_live_map_impl.h"
  50    :  
  51    :  #endif  // SYZYGY_BARD_TRACE_LIVE_MAP_H_