select: Add yet another workaround for struct epoll_event, this time for x86_64.

So, it's now clear that dealing with this struct should be rather moved on C side.

Author: pfalcon

_libc/_libc.py

@@ -1,4 +1,5 @@
 import ffi
+import sys
 
 
 _h = None
@@ -22,3 +23,12 @@ def get():
 def set_names(n):
     global names
     names = n
+
+# Find out bitness of the platform, even if long ints are not supported
+# TODO: All bitness differences should be removed from micropython-lib, and
+# this snippet too.
+bitness = 1
+v = sys.maxsize
+while v:
+    bitness += 1
+    v >>= 1

select/metadata.txt

@@ -1,5 +1,5 @@
 srctype = micropython-lib
 type = module
-version = 0.0.8
+version = 0.1
 author = Paul Sokolovsky
 depends = os, libc

select/select.py

@@ -26,7 +26,11 @@
 # On x86, uint64_t is 4-byte aligned, on many other platforms - 8-byte.
 # Until uctypes module can assign native struct offset, use dirty hack
 # below.
-if struct.calcsize("IQ") == 12:
+# TODO: Get rid of all this dirtiness, move it on C side
+if _libc.bitness > 32:
+    # On x86_64, epoll_event is packed struct
+    epoll_event = "<IO"
+elif struct.calcsize("IQ") == 12:
     epoll_event = "IO"
 else:
     epoll_event = "QO"

select/setup.py

@@ -6,7 +6,7 @@
 
 
 setup(name='micropython-select',
-      version='0.0.8',
+      version='0.1',
       description='select module for MicroPython',
       long_description="This is a module reimplemented specifically for MicroPython standard library,\nwith efficient and lean design in mind. Note that this module is likely work\nin progress and likely supports just a subset of CPython's corresponding\nmodule. Please help with the development if you are interested in this\nmodule.",
       url='https://github.com/micropython/micropython/issues/405',