dump_utils.hpp

#pragma once

#include <systemd/sd-event.h>
#include <unistd.h>

#include <memory>

namespace phosphor
{
namespace dump
{

/* Need a custom deleter for freeing up sd_event */
struct EventDeleter
{
    void operator()(sd_event* event) const
    {
        event = sd_event_unref(event);
    }
};
using EventPtr = std::unique_ptr<sd_event, EventDeleter>;

/** @struct CustomFd
 *
 *  RAII wrapper for file descriptor.
 */
struct CustomFd
{
  private:
    /** @brief File descriptor */
    int fd = -1;

  public:
    CustomFd() = delete;
    CustomFd(const CustomFd&) = delete;
    CustomFd& operator=(const CustomFd&) = delete;
    CustomFd(CustomFd&&) = delete;
    CustomFd& operator=(CustomFd&&) = delete;

    /** @brief Saves File descriptor and uses it to do file operation
     *
     *  @param[in] fd - File descriptor
     */
    CustomFd(int fd) : fd(fd)
    {
    }

    ~CustomFd()
    {
        if (fd >= 0)
        {
            close(fd);
        }
    }

    int operator()() const
    {
        return fd;
    }
};

} // namespace dump
} // namespace phosphor