Re: Windows POSIX
Hi Conrad, On Tuesday 22 February 2005 04:34, Conrad T. Pino wrote: How does abstracting all CVS I/O calls for files, pipes and sockets sound to you? Emulating non-blocking I/O (including select()) with Windows API functions (asynchronous ReadFile()/WriteFile() and WaitForMultipleObjects()) is a nightmare. For instance a) you cannot cancel an asynchronous ReadFile() operation and then reliably determine the amount of data already read. b) cancelling a ReadFile() operation (via CancelIo()) automatically cancels any other I/O operation on the same handle c) you cannot determine the amount of data which can be read immediately (without blocking) for all kinds of input sources. Non-blocking writing has its own problems. Maybe there is an easy solution for this, but I have not yet found it. Kind regards Ingolf -- Ingolf Steinbach Jena-Optronik GmbH [EMAIL PROTECTED] ++49 3641 200-147 PGP: 0x7B3B5661 213C 828E 0C92 16B5 05D0 4D5B A324 EC04 ___ Bug-cvs mailing list Bug-cvs@gnu.org http://lists.gnu.org/mailman/listinfo/bug-cvs
Re: Windows POSIX
Maybe there is an easy solution for this, but I have not yet found it. What about taking some code/adapt code from cvsnt? I have not taken a detailed look at it, but there must already be some abstraction done ... Frank ___ Bug-cvs mailing list Bug-cvs@gnu.org http://lists.gnu.org/mailman/listinfo/bug-cvs
RE: Windows POSIX
Hi Derek, My Visual C++ 6.0 installation has source for the C Run Time library. File handles returned by open and create are NOT Windows API level file handles. They are an index into arrays of an internal library structure which contains a field for saving the Windows API level file handle. The Windows Socket API says socket handles MAY be used as Windows API level file handles: http://msdn.microsoft.com/library/en-us/winsock/winsock/socket_handles_2.asp Not as definite as I would prefer. To assure POSIX semantics it seems we need to insure file and socket handles exist in a single number space so they can be used together in a select implementation. How does abstracting all CVS I/O calls for files, pipes and sockets sound to you? Conrad ___ Bug-cvs mailing list Bug-cvs@gnu.org http://lists.gnu.org/mailman/listinfo/bug-cvs
