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/// \file utils/process/status.hpp
/// Provides the utils::process::status class.

#if !defined(UTILS_PROCESS_STATUS_HPP)
#define UTILS_PROCESS_STATUS_HPP

#include "utils/process/status_fwd.hpp"

#include <ostream>
#include <utility>

#include "utils/optional.ipp"

namespace utils {
namespace process {


/// Representation of the termination status of a process.
class status {
    /// The PID of the process that generated this status.
    ///
    /// Note that the process has exited already and been awaited for, so the
    /// PID cannot be used to address the process.
    int _dead_pid;

    /// The exit status of the process, if it exited cleanly.
    optional< int > _exited;

    /// The signal that terminated the program, if any, and if it dumped core.
    optional< std::pair< int, bool > > _signaled;

    status(const optional< int >&, const optional< std::pair< int, bool > >&);

public:
    status(const int, int);
    static status fake_exited(const int);
    static status fake_signaled(const int, const bool);

    int dead_pid(void) const;

    bool exited(void) const;
    int exitstatus(void) const;

    bool signaled(void) const;
    int termsig(void) const;
    bool coredump(void) const;
};


std::ostream& operator<<(std::ostream&, const status&);


}  // namespace process
}  // namespace utils

#endif  // !defined(UTILS_PROCESS_STATUS_HPP)