1    :  // Copyright 2012 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    :  #ifndef SYZYGY_AGENT_COMMON_SCOPED_LAST_ERROR_KEEPER_H_
  16    :  #define SYZYGY_AGENT_COMMON_SCOPED_LAST_ERROR_KEEPER_H_
  17    :  
  18    :  namespace agent {
  19    :  namespace common {
  20    :  
  21    :  // Helper structure to capture and restore the current thread's last win32
  22    :  // error-code value.
  23    :  struct ScopedLastErrorKeeper {
  24  E :    ScopedLastErrorKeeper() : last_error(::GetLastError()) {
  25  E :    }
  26    :  
  27  E :    ~ScopedLastErrorKeeper() {
  28  E :      ::SetLastError(last_error);
  29  E :    }
  30    :  
  31    :    DWORD last_error;
  32    :  };
  33    :  
  34    :  }  // namespace common
  35    :  }  // namespace agent
  36    :  
  37    :  #endif  // SYZYGY_AGENT_COMMON_SCOPED_LAST_ERROR_KEEPER_H_