SetClassParsing.h

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#ifndef FWCore_Reflection_interface_SetClassParsing_h
#define FWCore_Reflection_interface_SetClassParsing_h

#include "TInterpreter.h"

#include <atomic>
#include <cassert>

namespace edm {
  class SetClassParsing {
  public:
    SetClassParsing(bool enable) {
      bool expected = false;
      const bool used_concurrently_but_shouldnt = active_.compare_exchange_strong(expected, true);
      assert(used_concurrently_but_shouldnt);
      previous_ = gInterpreter->SetClassAutoparsing(enable);
    }
    ~SetClassParsing() {
      gInterpreter->SetClassAutoparsing(previous_);
      active_ = false;
    }

  private:
    int previous_;
    static std::atomic<bool> active_;  // to detect if the class is used in concurrent context
  };
}  // namespace edm

#endif