On Sun, Feb 26, 2006 at 12:18:19PM -0800, Linus Torvalds wrote: >On Sun, 26 Feb 2006, Christopher Faylor wrote: >>If the speed of cygwin's fork is an issue then I'd previously suggested >>using spawn*. The spawn family of functions were designed to emulate >>Windows functions of the same name. They start a new process without >>the requirement of forking. > >I thought that cygwin didn't implement the posix_spawn*() family? Right. It just implements the windows version of spawn. I looked more closely at the posix_spawn functions after you last suggested it and, while it would be possible to implement this in cygwin, these functions are a lot more heavyweight than the windows-like implementation of spawn that are already in cygwin. So, they would come with their own performance penalty. The cygwin/windows version of spawn is basically like an extended version of exec*(): pid = spawnlp (P_NOWAIT, "/bin/ls", "ls", "-l", NULL); will start "/bin/ls" and return a pid which can be used in waitpid. There is still some overhead to this function but it basically is just a wrapper around the Windows CreateProcess, which means that it doesn't go through the annoying overhead of Cygwin's fork. The posix_spawn stuff is in my todo list but the Windows spawn stuff could be used now. cgf - To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.htmlReceived on Mon Feb 27 07:41:02 2006
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