From fea2af1e9b0c99cac6cb8806c4af651a38e92d07 Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Mon, 4 Jan 1993 09:16:51 +0000
Subject: * More changes due to stricter argument passing rules * Fixed
 calendar.py, mimetools.py, whrandom.py to cope with time.time()   returning a
 floating point number.  (And fix old bug in calendar) * Add recursion level
 to mainloop.mainloop(), to make it reentrant.

---
 Lib/lib-stdwin/mainloop.py | 48 +++++++++++++++++++++++++++++++---------------
 1 file changed, 33 insertions(+), 15 deletions(-)

(limited to 'Lib/lib-stdwin/mainloop.py')

diff --git a/Lib/lib-stdwin/mainloop.py b/Lib/lib-stdwin/mainloop.py
index f1fe6170b1..6b574cf2a4 100644
--- a/Lib/lib-stdwin/mainloop.py
+++ b/Lib/lib-stdwin/mainloop.py
@@ -4,6 +4,9 @@
 # - have a 'dispatch' function as a window member
 
 
+# XXX This is UNIX specific!  For the Mac we need to use a simpler version!
+
+
 import stdwin, stdwinq
 from stdwinevents import *
 
@@ -123,23 +126,38 @@ def do_select():
 # Python's stdwin.getevent() turns WE_COMMAND/WC_CANCEL events
 # into KeyboardInterrupt exceptions; these are turned back in events.
 #
+recursion_level = 0 # Hack to make it reentrant
 def mainloop():
-	stdwin_select_handler() # Process events already in stdwin queue
-	fd = stdwin.fileno()
-	while 1:
-		if windows:
-			registerfd(fd, 'r', stdwin_select_handler)
-			try:
-				while windows:
+	global recursion_level
+	recursion_level = recursion_level + 1
+	try:
+		stdwin_select_handler() # Process events already in queue
+		fd = stdwin.fileno()
+		while 1:
+			if windows:
+				if recursion_level == 1:
+				    registerfd(fd, 'r', stdwin_select_handler)
+				try:
+					while windows:
+						do_select()
+						stdwin_select_handler()
+				finally:
+					if recursion_level == 1:
+						unregisterfd(fd)
+			elif fdlist:
+				while fdlist and not windows:
 					do_select()
-					stdwin_select_handler()
-			finally:
-				unregisterfd(fd)
-		elif fdlist:
-			while fdlist and not windows:
-				do_select()
-		else:
-			break
+			else:
+				break
+	finally:
+		recursion_level = recursion_level - 1
+
+
+# Check for events without ever blocking
+#
+def check():
+	stdwin_select_handler()
+	# XXX Should check for socket stuff as well
 
 
 # Handle stdwin events until none are left
-- 
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