* [PATCH] bb/event.py: fire_ui_handlers enable threading lock support
@ 2016-10-04 16:43 Aníbal Limón
0 siblings, 0 replies; only message in thread
From: Aníbal Limón @ 2016-10-04 16:43 UTC (permalink / raw)
To: bitbake-devel; +Cc: joshua.g.lock, clarson
In some cases there is a need to fire bb events into multiple
python threads so locking is needed (writing to a fd/socket).
Adding a helper functions for disable/enable by request to avoid
overhead.
[YOCTO #10330]
Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
---
lib/bb/event.py | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/lib/bb/event.py b/lib/bb/event.py
index 42745e2..32298d5 100644
--- a/lib/bb/event.py
+++ b/lib/bb/event.py
@@ -29,6 +29,8 @@ import logging
import atexit
import traceback
import ast
+import threading
+
import bb.utils
import bb.compat
import bb.exceptions
@@ -68,12 +70,22 @@ _event_handler_map = {}
_catchall_handlers = {}
_eventfilter = None
_uiready = False
+_thread_lock = threading.Lock()
+_thread_lock_enabled = False
if hasattr(__builtins__, '__setitem__'):
builtins = __builtins__
else:
builtins = __builtins__.__dict__
+def enable_threadlock():
+ global _thread_lock_enabled
+ _thread_lock_enabled = True
+
+def disable_threadlock():
+ global _thread_lock_enabled
+ _thread_lock_enabled = False
+
def execute_handler(name, handler, event, d):
event.data = d
addedd = False
@@ -146,11 +158,17 @@ def print_ui_queue():
logger.handle(event)
def fire_ui_handlers(event, d):
+ global _thread_lock
+ global _thread_lock_enabled
+
if not _uiready:
# No UI handlers registered yet, queue up the messages
ui_queue.append(event)
return
+ if _thread_lock_enabled:
+ _thread_lock.Acquire()
+
errors = []
for h in _ui_handlers:
#print "Sending event %s" % event
@@ -169,6 +187,9 @@ def fire_ui_handlers(event, d):
for h in errors:
del _ui_handlers[h]
+ if _thread_lock_enabled:
+ _thread_lock.Release()
+
def fire(event, d):
"""Fire off an Event"""
--
2.1.4
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2016-10-04 16:43 [PATCH] bb/event.py: fire_ui_handlers enable threading lock support Aníbal Limón
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