Line data    Source code

       1             : 
       2             : /* Copyright (c) 2010-2017, Stefan Eilemann <eile@equalizergraphics.com>
       3             :  *
       4             :  * This file is part of Collage <https://github.com/Eyescale/Collage>
       5             :  *
       6             :  * This library is free software; you can redistribute it and/or modify it under
       7             :  * the terms of the GNU Lesser General Public License version 2.1 as published
       8             :  * by the Free Software Foundation.
       9             :  *
      10             :  * This library is distributed in the hope that it will be useful, but WITHOUT
      11             :  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
      12             :  * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
      13             :  * details.
      14             :  *
      15             :  * You should have received a copy of the GNU Lesser General Public License
      16             :  * along with this library; if not, write to the Free Software Foundation, Inc.,
      17             :  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
      18             :  */
      19             : 
      20             : #ifndef CO_EVENT_CONNECTION_H
      21             : #define CO_EVENT_CONNECTION_H
      22             : 
      23             : #include <co/connection.h> // base class
      24             : 
      25             : #include "buffer.h"
      26             : #include "pipeConnection.h"
      27             : 
      28             : namespace co
      29             : {
      30             : /**
      31             :  * A connection signalling an event.
      32             :  *
      33             :  * The connection is only useful to signal something to a ConnectionSet. No data
      34             :  * can be read or written from it.
      35             :  */
      36             : class EventConnection : public Connection
      37             : {
      38             : public:
      39             :     CO_API EventConnection();
      40             :     CO_API virtual ~EventConnection();
      41             : 
      42             :     CO_API bool connect() override;
      43          52 :     CO_API void close() override { _close(); }
      44             :     CO_API void set();
      45             :     CO_API void reset();
      46             : 
      47             :     CO_API Notifier getNotifier() const override;
      48             : 
      49             : protected:
      50           0 :     void readNB(void*, const uint64_t) override { LBDONTCALL; }
      51           0 :     int64_t readSync(void*, const uint64_t, const bool) override
      52             :     {
      53           0 :         LBDONTCALL;
      54           0 :         return -1;
      55             :     }
      56           0 :     CO_API int64_t write(const void*, const uint64_t) override
      57             :     {
      58           0 :         LBDONTCALL;
      59           0 :         return -1;
      60             :     }
      61             : 
      62             : private:
      63             : #ifdef _WIN32
      64             :     void* _event;
      65             : #else
      66             :     PipeConnectionPtr _connection;
      67             :     std::mutex _lock;
      68             :     bool _set;
      69             : #endif
      70             : 
      71             :     Buffer _buffer;
      72             : 
      73             :     void _close();
      74             : };
      75             : }
      76             : 
      77             : #endif // CO_EVENT_CONNECTION_H