[Patch 10/10 V3] BaseTools: Enable block queue log agent.

["Bob Feng" <bob.c.feng@intel.com>]

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1875

To support Ctrl+S and Ctrl+Q, we enable block queue
for log.

Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Bob Feng <bob.c.feng@intel.com>
---
 BaseTools/Source/Python/Common/EdkLogger.py | 10 ++++++----
 BaseTools/Source/Python/build/build.py      |  8 +++++---
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/BaseTools/Source/Python/Common/EdkLogger.py b/BaseTools/Source/Python/Common/EdkLogger.py
index 15fd1458a95a..06da4a9d0a1d 100644
--- a/BaseTools/Source/Python/Common/EdkLogger.py
+++ b/BaseTools/Source/Python/Common/EdkLogger.py
@@ -93,11 +93,13 @@ except:
             """
             try:
                 self.enqueue(self.prepare(record))
             except Exception:
                 self.handleError(record)
-
+class BlockQueueHandler(QueueHandler):
+    def enqueue(self, record):
+        self.queue.put(record,True)
 ## Log level constants
 DEBUG_0 = 1
 DEBUG_1 = 2
 DEBUG_2 = 3
 DEBUG_3 = 4
@@ -290,23 +292,23 @@ def LogClientInitialize(log_q):
     # Since we use different format to log different levels of message into different
     # place (stdout or stderr), we have to use different "Logger" objects to do this.
     #
     # For DEBUG level (All DEBUG_0~9 are applicable)
     _DebugLogger.setLevel(INFO)
-    _DebugChannel = QueueHandler(log_q)
+    _DebugChannel = BlockQueueHandler(log_q)
     _DebugChannel.setFormatter(_DebugFormatter)
     _DebugLogger.addHandler(_DebugChannel)
 
     # For VERBOSE, INFO, WARN level
     _InfoLogger.setLevel(INFO)
-    _InfoChannel = QueueHandler(log_q)
+    _InfoChannel = BlockQueueHandler(log_q)
     _InfoChannel.setFormatter(_InfoFormatter)
     _InfoLogger.addHandler(_InfoChannel)
 
     # For ERROR level
     _ErrorLogger.setLevel(INFO)
-    _ErrorCh = QueueHandler(log_q)
+    _ErrorCh = BlockQueueHandler(log_q)
     _ErrorCh.setFormatter(_ErrorFormatter)
     _ErrorLogger.addHandler(_ErrorCh)
 
 ## Set log level
 #
diff --git a/BaseTools/Source/Python/build/build.py b/BaseTools/Source/Python/build/build.py
index 4125b2832946..603d3aa6dad4 100644
--- a/BaseTools/Source/Python/build/build.py
+++ b/BaseTools/Source/Python/build/build.py
@@ -2046,14 +2046,15 @@ class Build():
                     for m in Pa.GetAllModuleInfo:
                         mqueue.put(m)
                     data_pipe_file = os.path.join(Pa.BuildDir, "GlobalVar_%s_%s.bin" % (str(Pa.Guid),Pa.Arch))
                     Pa.DataPipe.dump(data_pipe_file)
                     autogen_rt = self.StartAutoGen(mqueue, Pa.DataPipe, self.SkipAutoGen, PcdMaList,self.share_data)
-                    self.Progress.Stop("done!")
-                    self.AutoGenTime += int(round((time.time() - AutoGenStart)))
+
                     if not autogen_rt:
                         return
+                self.AutoGenTime += int(round((time.time() - AutoGenStart)))
+                self.Progress.Stop("done!")
                 for Arch in Wa.ArchList:
                     MakeStart = time.time()
                     for Ma in BuildModules:
                         # Generate build task for the module
                         if not Ma.IsBinaryModule:
@@ -2294,17 +2295,18 @@ def LogBuildTime(Time):
 # if it's executed successfully or not.
 #
 #   @retval 0     Tool was successful
 #   @retval 1     Tool failed
 #
+LogQMaxSize = 60
 def Main():
     StartTime = time.time()
 
     #
     # Create a log Queue
     #
-    LogQ = mp.Queue()
+    LogQ = mp.Queue(LogQMaxSize)
     # Initialize log system
     EdkLogger.LogClientInitialize(LogQ)
     GlobalData.gCommand = sys.argv[1:]
     #
     # Parse the options and args
-- 
2.20.1.windows.1