expose a getpid library function for Rakudo $*PID and other languages

[mberends]

Please enable language implementations to read the ID of the running Parrot process. Coke++ implemented it in partcl with an "evil" workaround:

 http://github.com/partcl/partcl/blob/master/runtime/builtin/pid.pir

In Windows the lib should not be null, it should get the loadlib 'kernel32' result, and the function name is '_getpid' instead of 'getpid'.

The idea was discussed during about an hour from  http://irclog.perlgeek.de/parrot/2010-04-19#i_2242886

The Rakudo file src/cheats/setup-io.pm intends to use this function. In the meantime, it may get by with a workaround similar to the one in partcl.

[NotFound]

Function Parrot_getpid introduced as experimental in r48580

[NotFound]

Added a win32 version in 93f58ba1bd5c75763b5e193a6fc4444ca9115cc6

I've used GetCurrentProcessId, looks better than the evil workaround and I think it should work in the windows versions we support. Feedback welcome.

[moritz]

FYI, Rakudo now uses the getpid method from the parrot interpreter.

As soon as it's not "experimental" anymore, this ticket can be closed.

[NotFound]

After discussion on irc, the decision was to get out of experimental status both the Parrot_getpid function and the method getpid on Interpreter, making both supported.

When DEPRECATED.pod and other docs and comments get updated, I'm going to close this ticket.

[NotFound]

Done in aaf8008, closing.