src/commons/closing.h

#ifndef COMMONS_CLOSING_H
#define COMMONS_CLOSING_H

#include <boost/utility.hpp>
#include <commons/check.h>
#include <commons/utility.h>

namespace commons
{

  using namespace boost;

  // void checked_close(int &fd) { check0x(close(fd)); }

  struct fd_closer { static void apply(int fd) { check0x(close(fd)); } };

  template<typename T, typename Closer>
  class closing
  {
    NONCOPYABLE(closing)
    public:
      closing(T x) : x(x), scoped(true) {}
      ~closing() { if (scoped) Closer::apply(x); }
      T get() { return x; }
      operator T() { return x; }
      T release() { scoped = false; return x; }
    private:
      T x;
      bool scoped;
  };

  typedef closing<int, fd_closer> closingfd;

}

#endif

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