C++ AsyncQueue::push方法代码示例

TEST(AsyncQueue, TestConsumeNConsumesAfterEmptyQueue)
{
    AsyncQueue<int> q;

    q.push(1);
    q.push(2);
    std::atomic<bool> threadDone = false;
    std::thread t1([&]() 
    {
        q.consumeN(3, [](int){});
        threadDone = true;
    });	
    std::this_thread::sleep_for(std::chrono::milliseconds(250));
    ASSERT_EQ(0, q.size());
    ASSERT_EQ(false, threadDone);

    q.push(1);
    std::this_thread::sleep_for(std::chrono::milliseconds(250));
    ASSERT_EQ(0, q.size());
    ASSERT_EQ(true, threadDone);
    t1.join();
}

int VlcProc::onGenericCallback2( vlc_object_t *pObj, const char *pVariable,
                                 vlc_value_t oldVal, vlc_value_t newVal,
                                 void *pParam )
{
    (void)oldVal;
    VlcProc *pThis = (VlcProc*)pParam;
    AsyncQueue *pQueue = AsyncQueue::instance( pThis->getIntf() );

    /**
     * For intf-event, commands are labeled based on the value of newVal.
     *
     * For some values (e.g position), only keep the latest command
     * when there are multiple pending commands (remove=true).
     *
     * for others, don't discard commands (remove=false)
     **/
    if( strcmp( pVariable, "intf-event" ) == 0 )
    {
        stringstream label;
        bool b_remove;
        switch( newVal.i_int )
        {
            case INPUT_EVENT_STATE:
            case INPUT_EVENT_POSITION:
            case INPUT_EVENT_RATE:
            case INPUT_EVENT_ES:
            case INPUT_EVENT_CHAPTER:
            case INPUT_EVENT_RECORD:
                b_remove = true;
                break;
            case INPUT_EVENT_VOUT:
            case INPUT_EVENT_AOUT:
            case INPUT_EVENT_DEAD:
                b_remove = false;
                break;
            default:
                return VLC_SUCCESS;
        }
        label <<  pVariable << "_" << newVal.i_int;
        CmdGeneric *pCmd = new CmdCallback( pThis->getIntf(), pObj, newVal,
                                            &VlcProc::on_intf_event_changed,
                                            label.str() );
        if( pCmd )
            pQueue->push( CmdGenericPtr( pCmd ), b_remove );

        return VLC_SUCCESS;
    }

    msg_Err( pThis->getIntf(), "no callback entry for %s", pVariable );
    return VLC_EGENERIC;
}

int VlcProc::onEqPreampChange( vlc_object_t *pObj, const char *pVariable,
                               vlc_value_t oldVal, vlc_value_t newVal,
                               void *pParam )
{
    VlcProc *pThis = (VlcProc*)pParam;
    EqualizerPreamp *pVarPreamp = (EqualizerPreamp*)(pThis->m_cVarEqPreamp.get());

    // Post a set preamp command
    CmdSetEqPreamp *pCmd = new CmdSetEqPreamp( pThis->getIntf(), *pVarPreamp,
                                              (newVal.f_float + 20.0) / 40.0 );
    AsyncQueue *pQueue = AsyncQueue::instance( pThis->getIntf() );
    pQueue->push( CmdGenericPtr( pCmd ) );

    return VLC_SUCCESS;
}

void Dialogs::showPlaylistSaveCB( intf_dialog_args_t *pArg )
{
    intf_thread_t *pIntf = (intf_thread_t *)pArg->p_arg;

    if( pArg->i_results && pArg->psz_results[0] )
    {
        // Create a Playlist Save command
        CmdPlaylistSave *pCmd =
            new CmdPlaylistSave( pIntf, pArg->psz_results[0] );

        // Push the command in the asynchronous command queue
        AsyncQueue *pQueue = AsyncQueue::instance( pIntf );
        pQueue->push( CmdGenericPtr( pCmd ) );
    }
}

int VlcProc::onEqBandsChange( vlc_object_t *pObj, const char *pVariable,
                              vlc_value_t oldVal, vlc_value_t newVal,
                              void *pParam )
{
    VlcProc *pThis = (VlcProc*)pParam;

    // Post a set equalizer bands command
    CmdSetEqBands *pCmd = new CmdSetEqBands( pThis->getIntf(),
                                             pThis->m_varEqBands,
                                             newVal.psz_string );
    AsyncQueue *pQueue = AsyncQueue::instance( pThis->getIntf() );
    pQueue->push( CmdGenericPtr( pCmd ) );

    return VLC_SUCCESS;
}

int VlcProc::onItemDelete( vlc_object_t *pObj, const char *pVariable,
                           vlc_value_t oldVal, vlc_value_t newVal,
                           void *pParam )
{
    VlcProc *pThis = (VlcProc*)pParam;

    int i_id = newVal.i_int;
    CmdPlaytreeDelete *pCmdTree =
        new CmdPlaytreeDelete( pThis->getIntf(), i_id);

    // Push the command in the asynchronous command queue
    AsyncQueue *pQueue = AsyncQueue::instance( pThis->getIntf() );
    pQueue->push( CmdGenericPtr( pCmdTree ), false );

    return VLC_SUCCESS;
}

int VlcProc::onItemAppend( vlc_object_t *pObj, const char *pVariable,
                           vlc_value_t oldVal, vlc_value_t newVal,
                           void *pParam )
{
    VlcProc *pThis = (VlcProc*)pParam;

    playlist_add_t *p_add = static_cast<playlist_add_t*>(newVal.p_address);
    CmdPlaytreeAppend *pCmdTree =
        new CmdPlaytreeAppend( pThis->getIntf(), p_add );

    // Push the command in the asynchronous command queue
    AsyncQueue *pQueue = AsyncQueue::instance( pThis->getIntf() );
    pQueue->push( CmdGenericPtr( pCmdTree ), false );

    return VLC_SUCCESS;
}

int VoutManager::controlWindow( struct vout_window_t *pWnd,
                            int query, va_list args )
{
    intf_thread_t *pIntf = (intf_thread_t *)pWnd->p_private;
    VoutManager *pThis = pIntf->p_sys->p_voutManager;
    vout_thread_t* pVout = pWnd->vout;

    switch( query )
    {
        case VOUT_SET_SIZE:
        {
            unsigned int i_width  = va_arg( args, unsigned int );
            unsigned int i_height = va_arg( args, unsigned int );

            if( i_width && i_height )
            {
                pThis->lockVout();

                vector<SavedVout>::iterator it;
                for( it = pThis->m_SavedVoutVec.begin();
                     it != pThis->m_SavedVoutVec.end(); it++ )
                {
                    if( (*it).pVout == pVout )
                    {
                        // Post a vout resize command
                        CmdResizeVout *pCmd =
                            new CmdResizeVout( pThis->getIntf(),
                                               (*it).pVoutWindow,
                                               (int)i_width, (int)i_height );
                        AsyncQueue *pQueue =
                            AsyncQueue::instance( pThis->getIntf() );
                        pQueue->push( CmdGenericPtr( pCmd ) );
                        break;
                    }
                }

                pThis->unlockVout();
            }
        }

        default:
            msg_Dbg( pWnd, "control query not supported" );
            break;
    }

    return VLC_SUCCESS;
}

int VlcProc::onItemChange( vlc_object_t *pObj, const char *pVariable,
                           vlc_value_t oldval, vlc_value_t newval,
                           void *pParam )
{
    VlcProc *pThis = (VlcProc*)pParam;
    input_item_t *p_item = static_cast<input_item_t*>(newval.p_address);

    // Create a playtree notify command
    CmdPlaytreeUpdate *pCmdTree = new CmdPlaytreeUpdate( pThis->getIntf(),
                                                         p_item );

    // Push the command in the asynchronous command queue
    AsyncQueue *pQueue = AsyncQueue::instance( pThis->getIntf() );
    pQueue->push( CmdGenericPtr( pCmdTree ), true );

    return VLC_SUCCESS;
}

void CmdUpdateItem::execute()
{
    playlist_t *pPlaylist = getIntf()->p_sys->p_playlist;
    if( pPlaylist == NULL )
        return;

    input_thread_t *p_input = playlist_CurrentInput( pPlaylist );
    if( !p_input )
        return;

    // Get playlist item information
    input_item_t *pItem = input_GetItem( p_input );

    char *pszName = input_item_GetName( pItem );
    char *pszUri = input_item_GetURI( pItem );

    string name = pszName;
    // XXX: This should be done in VLC core, not here...
    // Remove path information if any
    OSFactory *pFactory = OSFactory::instance( getIntf() );
    string::size_type pos = name.rfind( pFactory->getDirSeparator() );
    if( pos != string::npos )
    {
        name = name.substr( pos + 1, name.size() - pos + 1 );
    }
    UString srcName( getIntf(), name.c_str() );
    UString srcURI( getIntf(), pszUri );

    free( pszName );
    free( pszUri );

    // Create commands to update the stream variables
    CmdSetText *pCmd1 = new CmdSetText( getIntf(), m_rStreamName, srcName );
    CmdSetText *pCmd2 = new CmdSetText( getIntf(), m_rStreamURI, srcURI );
    // Push the commands in the asynchronous command queue
    AsyncQueue *pQueue = AsyncQueue::instance( getIntf() );
    pQueue->push( CmdGenericPtr( pCmd1 ), false );
    pQueue->push( CmdGenericPtr( pCmd2 ), false );
    vlc_object_release( p_input );
}

int ThemeRepository::changeSkin( vlc_object_t *pIntf, char const *pVariable,
                                 vlc_value_t oldval, vlc_value_t newval,
                                 void *pData )
{
    ThemeRepository *pThis = (ThemeRepository*)(pData);

    if( !strcmp( pVariable, "intf-skins-interactive" ) )
    {
        CmdDlgChangeSkin cmd( pThis->getIntf() );
        cmd.execute();
    }
    else if( !strcmp( pVariable, "intf-skins" ) )
    {
        // Try to load the new skin
        CmdChangeSkin *pCmd = new CmdChangeSkin( pThis->getIntf(),
                                                 newval.psz_string );
        AsyncQueue *pQueue = AsyncQueue::instance( pThis->getIntf() );
        pQueue->push( CmdGenericPtr( pCmd ) );
    }

    return VLC_SUCCESS;
}

//---------------------------------------------------------------------------
// Run: main loop
//---------------------------------------------------------------------------
static void Run( intf_thread_t *p_intf )
{
    // Load a theme
    ThemeLoader *pLoader = new ThemeLoader( p_intf );
    char *skin_last = config_GetPsz( p_intf, "skins2-last" );

    if( !skin_last || !*skin_last || !pLoader->load( skin_last ) )
    {
        // Get the resource path and try to load the default skin
        OSFactory *pOSFactory = OSFactory::instance( p_intf );
        const list<string> &resPath = pOSFactory->getResourcePath();
        const string &sep = pOSFactory->getDirSeparator();

        list<string>::const_iterator it;
        for( it = resPath.begin(); it != resPath.end(); it++ )
        {
            string path = (*it) + sep + "default.vlt";
            if( pLoader->load( path ) )
            {
                // Theme loaded successfully
                break;
            }
        }
        if( it == resPath.end() )
        {
            // Last chance: the user can select a new theme file
            if( Dialogs::instance( p_intf ) )
            {
                CmdDlgChangeSkin *pCmd = new CmdDlgChangeSkin( p_intf );
                AsyncQueue *pQueue = AsyncQueue::instance( p_intf );
                pQueue->push( CmdGenericPtr( pCmd ) );
            }
            else
            {
                // No dialogs provider, just quit...
                CmdQuit *pCmd = new CmdQuit( p_intf );
                AsyncQueue *pQueue = AsyncQueue::instance( p_intf );
                pQueue->push( CmdGenericPtr( pCmd ) );
                msg_Err( p_intf,
                         "Cannot show the \"open skin\" dialog: exiting...");
            }
        }
    }
    delete pLoader;

    if( skin_last )
    {
        free( skin_last );
    }

    // Get the instance of OSLoop
    OSLoop *loop = OSFactory::instance( p_intf )->getOSLoop();

    // Check if we need to start playing
    if( p_intf->b_play )
    {
        playlist_t *p_playlist =
            (playlist_t *)vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
                                           FIND_ANYWHERE );
        if( p_playlist )
        {
            playlist_Play( p_playlist );
            vlc_object_release( p_playlist );
        }
    }

    // Enter the main event loop
    loop->run();

    // Delete the theme and save the configuration of the windows
    if( p_intf->p_sys->p_theme )
    {
        p_intf->p_sys->p_theme->saveConfig();
        delete p_intf->p_sys->p_theme;
        p_intf->p_sys->p_theme = NULL;
    }
}

//---------------------------------------------------------------------------
// Run: main loop
//---------------------------------------------------------------------------
static void *Run( void * p_obj )
{
    int canc = vlc_savecancel();

    intf_thread_t *p_intf = (intf_thread_t *)p_obj;

    bool b_error = false;
    char *skin_last = NULL;
    ThemeLoader *pLoader = NULL;
    OSLoop *loop = NULL;

    vlc_mutex_lock( &p_intf->p_sys->init_lock );

    // Initialize singletons
    if( OSFactory::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot initialize OSFactory" );
        b_error = true;
        goto end;
    }
    if( AsyncQueue::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot initialize AsyncQueue" );
        b_error = true;
        goto end;
    }
    if( Interpreter::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot instantiate Interpreter" );
        b_error = true;
        goto end;
    }
    if( VarManager::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot instantiate VarManager" );
        b_error = true;
        goto end;
    }
    if( VlcProc::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot initialize VLCProc" );
        b_error = true;
        goto end;
    }
    if( VoutManager::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot instantiate VoutManager" );
        b_error = true;
        goto end;
    }
    if( ArtManager::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot instantiate ArtManager" );
        b_error = true;
        goto end;
    }
    if( ThemeRepository::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot instantiate ThemeRepository" );
        b_error = true;
        goto end;
    }
    if( Dialogs::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot instantiate qt4 dialogs provider" );
        b_error = true;
        goto end;
    }

    // Load a theme
    skin_last = config_GetPsz( p_intf, "skins2-last" );
    pLoader = new ThemeLoader( p_intf );

    if( !skin_last || !pLoader->load( skin_last ) )
    {
        // No skins (not even the default one). let's quit
        CmdQuit *pCmd = new CmdQuit( p_intf );
        AsyncQueue *pQueue = AsyncQueue::instance( p_intf );
        pQueue->push( CmdGenericPtr( pCmd ) );
        msg_Err( p_intf, "no skins found : exiting");
    }

    delete pLoader;
    free( skin_last );

    // Get the instance of OSLoop
    loop = OSFactory::instance( p_intf )->getOSLoop();

    // Signal the main thread this thread is now ready
    p_intf->p_sys->b_error = false;
    p_intf->p_sys->b_ready = true;
    vlc_cond_signal( &p_intf->p_sys->init_wait );
    vlc_mutex_unlock( &p_intf->p_sys->init_lock );

    // Enter the main event loop
    loop->run();

//.........这里部分代码省略.........

//---------------------------------------------------------------------------
// Run: main loop
//---------------------------------------------------------------------------
static void *Run( void * p_obj )
{
    int canc = vlc_savecancel();

    intf_thread_t *p_intf = (intf_thread_t *)p_obj;

    bool b_error = false;
    char *skin_last = NULL;
    ThemeLoader *pLoader = NULL;
    OSLoop *loop = NULL;

    vlc_mutex_lock( &p_intf->p_sys->init_lock );

    // Initialize singletons
    if( OSFactory::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot initialize OSFactory" );
        b_error = true;
        goto end;
    }
    if( AsyncQueue::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot initialize AsyncQueue" );
        b_error = true;
        goto end;
    }
    if( Interpreter::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot instanciate Interpreter" );
        b_error = true;
        goto end;
    }
    if( VarManager::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot instanciate VarManager" );
        b_error = true;
        goto end;
    }
    if( VlcProc::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot initialize VLCProc" );
        b_error = true;
        goto end;
    }
    if( VoutManager::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot instanciate VoutManager" );
        b_error = true;
        goto end;
    }
    if( ThemeRepository::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot instanciate ThemeRepository" );
        b_error = true;
        goto end;
    }
    if( Dialogs::instance( p_intf ) == NULL )
    {
        msg_Err( p_intf, "cannot instanciate qt4 dialogs provider" );
        b_error = true;
        goto end;
    }

    // Load a theme
    skin_last = config_GetPsz( p_intf, "skins2-last" );
    pLoader = new ThemeLoader( p_intf );

    if( !skin_last || !*skin_last || !pLoader->load( skin_last ) )
    {
        // Get the resource path and try to load the default skin
        OSFactory *pOSFactory = OSFactory::instance( p_intf );
        const list<string> &resPath = pOSFactory->getResourcePath();
        const string &sep = pOSFactory->getDirSeparator();

        list<string>::const_iterator it;
        for( it = resPath.begin(); it != resPath.end(); it++ )
        {
            string path = (*it) + sep + "default.vlt";
            if( pLoader->load( path ) )
            {
                // Theme loaded successfully
                break;
            }
        }
        if( it == resPath.end() )
        {
            // Last chance: the user can select a new theme file
            if( Dialogs::instance( p_intf ) )
            {
                CmdDlgChangeSkin *pCmd = new CmdDlgChangeSkin( p_intf );
                AsyncQueue *pQueue = AsyncQueue::instance( p_intf );
                pQueue->push( CmdGenericPtr( pCmd ) );
            }
            else
            {
                // No dialogs provider, just quit...
                CmdQuit *pCmd = new CmdQuit( p_intf );
//.........这里部分代码省略.........