Add global_event_loop() and GlibEventLoop.

This causes all PollScheduler instances within a given process to share
a singleton EventLoop instance, and also makes it possible to swap in
glib's main loop for all portage event loops in the main process.

1 files changed, 20 insertions, 0 deletions

diff --git a/pym/portage/util/_eventloop/GlibEventLoop.py b/pym/portage/util/_eventloop/GlibEventLoop.py
new file mode 100644
index 000000000..b35772e7f
--- /dev/null
+++ b/pym/portage/util/_eventloop/GlibEventLoop.py
@@ -0,0 +1,20 @@
+# Copyright 2012 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+import portage
+portage.proxy.lazyimport.lazyimport(globals(),
+	'glib',
+)
+
+class GlibEventLoop(object):
+
+	# TODO: Support multiprocessing by using a separate glib.MainContext
+	# instance for each process.
+	supports_multiprocessing = False
+
+	def __init__(self):
+		self.iteration = glib.main_context_default().iteration
+		self.idle_add = glib.idle_add
+		self.io_add_watch = glib.io_add_watch
+		self.timeout_add = glib.timeout_add
+		self.source_remove = glib.source_remove