modules/gui/skins2/commands/cmd_callbacks.hpp

   1 /*****************************************************************************
   2  * cmd_callbacks.hpp
   3  *****************************************************************************
   4  * Copyright (C) 2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Author: Erwan Tulou      <erwan10 aT videolan doT org >
   8  *         JP Dinger        <jpd (at) videolan (dot) org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #ifndef CMD_CALLBACKS_HPP
  26 #define CMD_CALLBACKS_HPP
  27
  28 #include "cmd_generic.hpp"
  29 #include "../src/vlcproc.hpp"
  30
  31
  32 class CmdCallback : public CmdGeneric
  33 {
  34 public:
  35     CmdCallback( intf_thread_t *pIntf, vlc_object_t *pObj, vlc_value_t newVal,
  36                  void (VlcProc::*func)(vlc_object_t *,vlc_value_t),
  37                  string label )
  38         : CmdGeneric( pIntf ), m_pObj( pObj ), m_newVal( newVal ),
  39           m_label( label ), m_pfExecute( func )
  40     {
  41         if( m_pObj )
  42             vlc_object_hold( m_pObj );
  43     }
  44     virtual ~CmdCallback()
  45     {
  46         if( m_pObj )
  47             vlc_object_release( m_pObj );
  48     }
  49     virtual void execute()
  50     {
  51         if( !m_pObj || !m_pfExecute )
  52             return;
  53
  54         (VlcProc::instance( getIntf() )->*m_pfExecute)( m_pObj, m_newVal );
  55
  56         vlc_object_release( m_pObj );
  57         m_pObj = NULL;
  58     }
  59     virtual string getType() const { return m_label; }
  60
  61 private:
  62     vlc_object_t* m_pObj;
  63     vlc_value_t   m_newVal;
  64     string        m_label;
  65     void (VlcProc::*m_pfExecute)(vlc_object_t *,vlc_value_t);
  66 };
  67
  68
  69 class CmdExecuteBlock : public CmdGeneric
  70 {
  71 public:
  72     CmdExecuteBlock( intf_thread_t* pIntf, vlc_object_t* obj,
  73                      void (*func) (intf_thread_t*, vlc_object_t* ) )
  74         : CmdGeneric( pIntf), m_pObj( obj ), m_pfFunc( func ),
  75           m_executing( false )
  76     {
  77         vlc_mutex_init( &m_lock );
  78         vlc_cond_init( &m_wait );
  79         if( m_pObj )
  80             vlc_object_hold( m_pObj );
  81     }
  82
  83     virtual ~CmdExecuteBlock()
  84     {
  85         if( m_pObj )
  86             vlc_object_release( m_pObj );
  87         vlc_cond_destroy( &m_wait );
  88         vlc_mutex_destroy( &m_lock );
  89     }
  90
  91     static void executeWait( const CmdGenericPtr& rcCommand  )
  92     {
  93         CmdExecuteBlock& rCmd = (CmdExecuteBlock&)*rcCommand.get();
  94         vlc_mutex_locker locker( &rCmd.m_lock );
  95
  96         if( !rCmd.m_pObj || !rCmd.m_pfFunc || rCmd.m_executing )
  97         {
  98             msg_Err( rCmd.getIntf(), "unexpected command call" );
  99             return;
 100         }
 101
 102         AsyncQueue *pQueue = AsyncQueue::instance( rCmd.getIntf() );
 103         pQueue->push( rcCommand, false );
 104
 105         rCmd.m_executing = true;
 106         while( rCmd.m_executing )
 107             vlc_cond_wait( &rCmd.m_wait, &rCmd.m_lock );
 108     }
 109
 110     virtual void execute()
 111     {
 112         vlc_mutex_locker locker( &m_lock );
 113
 114         if( !m_pObj || !m_pfFunc || !m_executing )
 115         {
 116             msg_Err( getIntf(), "unexpected command call" );
 117             return;
 118         }
 119
 120         (*m_pfFunc)( getIntf(), m_pObj );
 121         m_executing = false;
 122         vlc_cond_signal( &m_wait );
 123     }
 124
 125     virtual string getType() const { return "CmdExecuteBlock"; }
 126
 127 private:
 128     vlc_object_t* m_pObj;
 129     void          (*m_pfFunc)(intf_thread_t*, vlc_object_t*);
 130     bool          m_executing;
 131
 132     vlc_mutex_t   m_lock;
 133     vlc_cond_t    m_wait;
 134 };
 135
 136
 137 #endif