On Wed, Nov 25, 2015 at 05:51:41AM -0800, Aradeonas wrote: > Hi, > > I used GetTempFileName in a multi thread system and it causes problems > as you guess already. So the best way in my mind is using GUID and maybe > use it in a loop for checking not existing for extra safety. But I want > to know is there any clean implementation already that I dont know of?
It's pointless to check whether the file exists, since there's a race between checking whether the file exists and creating/using it. You need something that creates the file atomically only if it doesn't exist. For posix use open(2) with O_CREAT | O_EXCL. For Windows use CreateFile() with CREATE_NEW. When this fails, try again with another file name. Henry -- _______________________________________________ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
