Add support for new platform (IBM i)

.gitignore

@@ -16,3 +16,4 @@ syntax: glob
 .tox/
 build/
 dist/
+.vscode/

MANIFEST.in

@@ -25,12 +25,14 @@ include psutil/__init__.py
 include psutil/_common.py
 include psutil/_compat.py
 include psutil/_psaix.py
+include psutil/_psibmi.py
 include psutil/_psbsd.py
 include psutil/_pslinux.py
 include psutil/_psosx.py
 include psutil/_psposix.py
 include psutil/_pssunos.py
 include psutil/_psutil_aix.c
+include psutil/_psutil_ibmi.c
 include psutil/_psutil_bsd.c
 include psutil/_psutil_common.c
 include psutil/_psutil_common.h

psutil/__init__.py

@@ -163,7 +163,10 @@
     PROCFS_PATH = "/proc"
 
 elif AIX:
-    from . import _psaix as _psplatform
+    if os.uname().sysname == 'OS400':
+        from . import _psibmi as _psplatform
+    else:
+        from . import _psaix as _psplatform
 
     # This is public API and it will be retrieved from _pslinux.py
     # via sys.modules.
@@ -1675,7 +1678,7 @@ def cpu_count(logical=True):
         ret = _psplatform.cpu_count_logical()
     else:
         ret = _psplatform.cpu_count_physical()
-    if ret is not None and ret < 1:
+    if ret is not None and ret < 1 and os.uname().sysname != 'OS400':
         ret = None
     return ret