[Fwd: RE: Building CVS on Windows is broken...again]
Derek Robert Price <[email protected]>
| Newsgroups | gmane.comp.version-control.cvs.general,gmane.comp.version-control.cvs.bugs |
|---|---|
| Organization | Ximbiot <http://ximbiot.com> |
| Message-ID | <[email protected]> |
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Cross-posting in hopes of running this by more Windows experience... - -------- Original Message -------- Hi Derek, > From: Derek Robert Price [mailto:[email protected]] > > <http://www.opengroup.org/onlinepubs/007904975/functions/fcntl.html> has > a prototype and a description, but the only thing we need to be able to > do for this check is set an open file descriptor to enable non-blocking > reads (the call being used on UNIX is `fcntl (fd, F_SETFL, flags | > O_NONBLOCK)' ). Native Win32 handles don't have a blocking (synchronous) or (non-blocking) asynchronous attribute/property/flag i.e. this mode is NOT chosen at file open/create time. The choice is made when invoking the I/O operation by using either synchronous or asynchronous forms of the I/O operation. The same file handle will support concurrent asynchronous and synchronous I/O operations (provided they're invoked in the correct order or by different threads). Example ReadFile (either mode) & ReadFileEx (asynchronous only): http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/base/readfile.asp http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/base/readfileex.asp The real challenge lies in the POSIX compatibility routines of the I/O library which are in use. We need to find the library data structure that determines which Win32 API call will be invoked for the next CVS I/O function call. Can you provide a list of functions of interest for asynchronous I/O? I only have Visual C++ 6.0 and various Borland C/C++ compilers. How much flexibility do we have deviating away from Visual C++ 5? Has anybody tried a Win32 build with gcc hosted on Unix? Has anybody tried a Win32 build with gcc hosted on Windows? Conrad - -- *8^) Email: [email protected] Get CVS support at <http://ximbiot.com>! -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) Comment: Using GnuPG with Netscape - http://enigmail.mozdev.org iD8DBQFAMN1bLD1OTBfyMaQRAsbtAJwK1K70HVpdArnSotzkp2Bmcxj2cQCg+vLm n5Ae240Qo5bWlD2LZS+qaMQ= =MMUd -----END PGP SIGNATURE-----