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| Author | Forum: PowerTCP FTP for ActiveX Topic: Non blocking Retrieve problem |
| evanw evanw@videobankdigital.com From: Northvale, NJ USA Posts: 7 Member Since: 06/24/02 |
posted June 24, 2002 12:52 PM I'm using the latest updated version of the FTP and some funny problems have appeared. The app is a multi-threaded service and when the retrieve command is issued in non-blocking mode , nothing happens. In blocking mode the cpu usage is near 100% which is unacceptable. I even tried altering thread priority to non avail. Following is a an code fragment pFtp->TimeOut=0; pFtp->Type = DartFtp::ftpImage; pFtp->Directory = bsSourcePath.m_str; pFtp->Retrieve(bsFile.m_str,(VARIANT * ) &ovLocalFile,lMarker ); The call throws no exception and works perfectly (save the cpu utilization) in blocking mode. Any advice would be great since we cannot have this app take control of the entire servers resources. E |
K M Drake From: Utica, NY USA Posts: 3406 Member Since: 07/14/00 |
posted June 25, 2002 9:00 AM Hi, The control will relent when other processes require cpu cycles. As far as non-blocking usage, it looks like you are programming in a blocking fashion, but setting Timeout to 0. When using the control asynchronously, you must rely on events before making method calls. For example, in this case, the Retrieve should not be made until the Progress event has fired with a FtpCmd of FtpChangeDirectory (4), and a Status of FtpOk (0). Otherwise, the control could send commands before the server has responded to previous ones. -ken |
| evanw evanw@videobankdigital.com From: Northvale, NJ USA Posts: 7 Member Since: 06/24/02 |
posted June 25, 2002 9:27 AM Thanks tons !!! Can I start my session synchronosly (ie logon and change directory ) then set the timeout to 0 for async processing of the file transfer events? Regards, E |
| K M Drake From: Utica, NY USA Posts: 3406 Member Since: 07/14/00 |
posted June 25, 2002 9:54 AM Hi, Sure, you can do that if you want, just make sure to set it back and forth. It may be easier to just program the whole thing asynchronously. -ken |
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