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afb
Joined: 26 Jan 2005
Posts: 137
Location: Sweden
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 Posted: Wed May 04, 2005 5:00 am Post subject: "Posix" vs "Unix" |
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Background:
Mango uses version(Posix), while GDC uses version(Unix).
(and DMD just uses "linux" and ignorance, as it always has)
Just wondered if anyone had anyone opinions on the names ?
Maybe this could even be merged in a future D (DMD) version ?
Mango: (dmd -version=Posix is added by the Makefile)
| Code: |
version (Posix)
{
version(linux)
{
private import std.c.linux.linux;
alias std.c.linux.linux posix;
}
else version(darwin)
{
private import std.c.darwin.darwin;
alias std.c.darwin.darwin posix;
}
else static assert(0);
}
...
version (Win32) { // do Win32 stuff }
version (Posix) { // do Posix stuff }
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GDC: (version Unix is set by the compiler)
| Code: |
version (linux) {
version = Unix; // for DMD
}
version (Unix)
{
version (GNU) {
private import std.c.unix;
alias std.c.unix unix;
} else version (linux) {
private import std.c.linux.linux;
alias std.c.linux.linux unix;
}
}
...
version (Windows) { // do Windows stuff }
version (Unix) { // do Unix stuff }
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std.c.darwin.darwin has been "deprecated" in GDC 0.11.
(well, not really, but std.c.unix is the correct one to use)
Switching over to Unix would make it easier to port, but I
was just wondering which "name" that's really the best ? |
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sean
Joined: 24 Jun 2004
Posts: 609
Location: Bay Area, CA
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| Posted: Wed May 04, 2005 12:44 pm Post subject: |
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| Both :p I'd like it if we could just use 'Posix' but the Unix standard defines other stuff that people may want to use that is outside the POSIX umbrella: unistd, for instance. But as it's always preferable to restrict based on API rather than OS, I think use of the 'Posix' flag would be far more common. This may get somewhat nasty where high-performance stuff is concerned, as each OS tends to have its own nonstandard method for doing these things--socket comms being a prime example. So we'll likely also be stuck with flags for 'Aix', 'Bsd', 'Solaris', etc, that are used judiciously. |
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JJR
Joined: 22 Feb 2004
Posts: 1104
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| Posted: Wed May 04, 2005 1:41 pm Post subject: |
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| sean wrote: | | Both :p I'd like it if we could just use 'Posix' but the Unix standard defines other stuff that people may want to use that is outside the POSIX umbrella: unistd, for instance. But as it's always preferable to restrict based on API rather than OS, I think use of the 'Posix' flag would be far more common. This may get somewhat nasty where high-performance stuff is concerned, as each OS tends to have its own nonstandard method for doing these things--socket comms being a prime example. So we'll likely also be stuck with flags for 'Aix', 'Bsd', 'Solaris', etc, that are used judiciously. |
That's true. But at least with Posix we know we have an interface that is common across all unixes. OS specific calls will always be a reality; those API's should at least be independent.
-JJR |
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