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

#if !defined(UTILS_PROCESS_SYSTEMBUF_HPP)
#define UTILS_PROCESS_SYSTEMBUF_HPP

#include <cstddef>
#include <memory>
#include <streambuf>

#include "utils/noncopyable.hpp"

namespace utils {
namespace process {


/// A std::streambuf implementation for raw file descriptors.
///
/// This class grabs ownership of the file descriptor.  I.e. when the class is
/// destroyed, the file descriptor is closed unconditionally.
class systembuf : public std::streambuf, noncopyable {
    struct impl;

    /// Pointer to the shared internal implementation.
    std::unique_ptr< impl > _pimpl;

protected:
    int_type underflow(void);
    int_type overflow(int);
    int sync(void);

public:
    explicit systembuf(const int, std::size_t = 8192);
    ~systembuf(void);
};


}  // namespace process
}  // namespace utils

#endif  // !defined(UTILS_PROCESS_SYSTEMBUF_HPP)