Andrew M. Kuchling wrote: > Hmm... I don't know of any way to use mmap() on non-file things, > either; there are odd special cases, like using MAP_ANONYMOUS on > /dev/zero to allocate memory, but that's still using a file. On > the other hand, there may be some special case where you need to > do that. We could add a fileno() method to get the file > descriptor, but I don't know if that's useful to Windows. (Is > Sam Rushing, the original author of the Win32 mmapfile, on this > list?) > > What do we do about the tagname, which is a Win32 argument that > has no Unix counterpart -- I'm not even sure what its function > is. On Windows, a mmap is always backed by disk (swap space), but is not necessarily associated with a (user-land) file. The tagname is like the "name" associated with a semaphore; two processes opening the same tagname get shared memory. Fileno (in the c runtime sense) would be useless on Windows. As with all Win32 resources, there's a "handle", which is analagous. But different enough, it seems to me, to confound any attempts at a common API. Another fundamental difference (IIRC) is that Windows mmap's can be resized on the fly. - Gordon
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4