.. _program_listing_file_EventLoop_EventSignalHandle.cpp:

Program Listing for File EventSignalHandle.cpp
==============================================

|exhale_lsh| :ref:`Return to documentation for file <file_EventLoop_EventSignalHandle.cpp>` (``EventLoop/EventSignalHandle.cpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #include "netio3-backend/EventLoop/EventSignalHandle.hpp"
   
   #include <cstdint>
   #include <memory>
   #include <unistd.h>
   
   #include "netio3-backend/EventLoop/BaseEventLoop.hpp"
   #include "netio3-backend/EventLoop/Utility.hpp"
   
   netio3::EventSignalHandle::EventSignalHandle(const int fd,
                                                const std::shared_ptr<BaseEventLoop>& evloop) :
     m_fd{std::make_shared<int>(fd)}, m_evloop{evloop}
   {}
   
   netio3::EventSignalHandle::~EventSignalHandle()
   {
     if (m_fd.use_count() > 1) {
       return;
     }
     if (auto spt = m_evloop.lock()) {
       spt->remove_signal(*this);
     }
   }
   
   void netio3::EventSignalHandle::fire() const
   {
     const auto buf = std::uint64_t{1};
     const auto ret = write(*m_fd, &buf, sizeof(buf));
     constexpr static auto NBYTES = 8;
     if (ret != NBYTES) {
       ers::error(FailedFireSignal(ERS_HERE, *m_fd, ret, utility::error_message(errno)));
     }
   }