Deadman gist

deadman.hpp

//! A deadman switch that will execute it's constructor parameter on destruction unless disarm()'d
struct deadman
{
  deadman(std::function<void()> boom) : boom_(boom) {}
  ~deadman() { boom_(); }
  void disarm() { boom_ = [](){}; }
  std::function<void()> boom_;
};

uint8_t * myfunction()
{
  uint8_t * data;
  deadman onfailure([data]() { delete[] data; };

  data = new uint8_t[1024];

  if( try_to_fill_data(data) == false)
    throw std::runtime_error("Oh crap!");

  onfailure.disarm();
}