| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| # |
| |
| import threading, traceback, signal, sys, time |
| |
| def stackdump(sig, frm): |
| code = [] |
| for threadId, stack in sys._current_frames().items(): |
| code.append("\n# ThreadID: %s" % threadId) |
| for filename, lineno, name, line in traceback.extract_stack(stack): |
| code.append('File: "%s", line %d, in %s' % (filename, lineno, name)) |
| if line: |
| code.append(" %s" % (line.strip())) |
| print "\n".join(code) |
| |
| signal.signal(signal.SIGQUIT, stackdump) |
| |
| class LoudLock: |
| |
| def __init__(self): |
| self.lock = threading.RLock() |
| |
| def acquire(self, blocking=1): |
| while not self.lock.acquire(blocking=0): |
| time.sleep(1) |
| print >> sys.out, "TRYING" |
| traceback.print_stack(None, None, out) |
| print >> sys.out, "TRYING" |
| print >> sys.out, "ACQUIRED" |
| traceback.print_stack(None, None, out) |
| print >> sys.out, "ACQUIRED" |
| return True |
| |
| def _is_owned(self): |
| return self.lock._is_owned() |
| |
| def release(self): |
| self.lock.release() |
| |