23 #include <mtpprivatepskeys.h>

   147     

   148     /**

   149     * Set MTP PS Status

   150     * @param aStatus, next TMtpPSStatus

   151     *

   152     * newly implemented function to as enabler

   153     * to provide more state transition on application (MusicPlayer/MPX) during MTP by fully utilize the 3 PSStatus:

   154     *

   155     * EMtpPSStatusActive, == MTP operation related Media Files is performaning

   156     * EMtpPSStatusUninitialized == MTP not in use

   157     * EMtpPSStatusReadyToSync == MTP is connected, but no active operation related to Media Files

   158     *

   159     * this CAN enable 2 new behaviors:

   160     * 1. MTP status monitor is extracted out from USB Event Observer in harvester

   161     *    Harvester and Music player should be fully blocked if PS Status is EMtpPSStatusActive

   162     *    Music Player would prevent refresh/delete/add on UI level if PS Status is EMtpPSStatusReadyToSync  

   163     * 2. collectioncachedhelper to observed this status.

   164     *    when the ps status changed from EMtpPSStatusActive to EMtpPSStatusReadyToSync, it starts timer.

   165     *    and when it is reached, it flush all cache.

   166     *    the timer is canceled when ps status is back to active.

   167     */

   168     IMPORT_C static void SetPSStatus( TMtpPSStatus aStatus );

   169 

   170     /**

   171     * Set MTP PS Status (actually)

   172     * @param aStatus, next TMtpPSStatus

   173     */

   174     static void DoSetPSStatus( TMtpPSStatus aStatus );