From 3f901a5c683fb90ef69c33c8e8f1a8f65853b43a Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Sat, 4 Sep 2010 16:00:36 -0700
Subject: Add a Scheduler._frozen_config attribute that will be useful for
 dependency calculations related to aggressive parallelization (bug #279623).
 The FakeVartree instances are shared with the existing BlockerDB instances.

---
 pym/_emerge/BlockerDB.py | 18 ++++++++----------
 pym/_emerge/Scheduler.py | 13 ++++++++++---
 2 files changed, 18 insertions(+), 13 deletions(-)

diff --git a/pym/_emerge/BlockerDB.py b/pym/_emerge/BlockerDB.py
index f671a58a7..53a48bf81 100644
--- a/pym/_emerge/BlockerDB.py
+++ b/pym/_emerge/BlockerDB.py
@@ -9,7 +9,6 @@ from portage import digraph
 from portage._sets.base import InternalPackageSet
 
 from _emerge.BlockerCache import BlockerCache
-from _emerge.FakeVartree import FakeVartree
 from _emerge.show_invalid_depstring_notice import show_invalid_depstring_notice
 
 if sys.hexversion >= 0x3000000:
@@ -17,23 +16,22 @@ if sys.hexversion >= 0x3000000:
 
 class BlockerDB(object):
 
-	def __init__(self, root_config):
+	def __init__(self, fake_vartree):
+		root_config = fake_vartree._root_config
 		self._root_config = root_config
 		self._vartree = root_config.trees["vartree"]
 		self._portdb = root_config.trees["porttree"].dbapi
 
 		self._dep_check_trees = None
-		self._fake_vartree = None
+		self._fake_vartree = fake_vartree
+		self._dep_check_trees = {
+			self._vartree.root : {
+				"porttree"    :  fake_vartree,
+				"vartree"     :  fake_vartree,
+		}}
 
 	def _get_fake_vartree(self, acquire_lock=0):
 		fake_vartree = self._fake_vartree
-		if fake_vartree is None:
-			fake_vartree = FakeVartree(self._root_config)
-			self._fake_vartree = fake_vartree
-			self._dep_check_trees = { self._vartree.root : {
-				"porttree"    :  fake_vartree,
-				"vartree"     :  fake_vartree,
-			}}
 		fake_vartree.sync(acquire_lock=acquire_lock)
 		return fake_vartree
 
diff --git a/pym/_emerge/Scheduler.py b/pym/_emerge/Scheduler.py
index b78be89f9..86d815c8c 100644
--- a/pym/_emerge/Scheduler.py
+++ b/pym/_emerge/Scheduler.py
@@ -38,7 +38,8 @@ from _emerge.clear_caches import clear_caches
 from _emerge.create_depgraph_params import create_depgraph_params
 from _emerge.create_world_atom import create_world_atom
 from _emerge.DepPriority import DepPriority
-from _emerge.depgraph import depgraph, resume_depgraph
+from _emerge.depgraph import depgraph, resume_depgraph, \
+	_frozen_depgraph_config
 from _emerge.EbuildFetcher import EbuildFetcher
 from _emerge.EbuildPhase import EbuildPhase
 from _emerge.emergelog import emergelog, _emerge_log_dir
@@ -196,17 +197,23 @@ class Scheduler(PollScheduler):
 		self.edebug = 0
 		if settings.get("PORTAGE_DEBUG", "") == "1":
 			self.edebug = 1
-		self.pkgsettings = {}
 		self._config_pool = {}
 
 		# TODO: Replace the BlockerDB with a depgraph of installed packages
 		# that's updated incrementally with each upgrade/uninstall operation
 		# This will be useful for making quick and safe decisions with respect
 		# to aggressive parallelization discussed in bug #279623.
+		frozen_config = None
+		if frozen_config is None:
+			frozen_config = _frozen_depgraph_config(settings, trees,
+				myopts, None)
+		self._frozen_config = frozen_config
+		self.pkgsettings = frozen_config.pkgsettings
 		self._blocker_db = {}
 		for root in trees:
 			self._config_pool[root] = []
-			self._blocker_db[root] = BlockerDB(trees[root]["root_config"])
+			self._blocker_db[root] = BlockerDB(
+				frozen_config.trees[root]["vartree"])
 
 		fetch_iface = self._fetch_iface_class(log_file=self._fetch_log,
 			schedule=self._schedule_fetch)
-- 
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