def _try_acquire(self, blocking, watch):
try:
self.trylock()
except IOError as e:
if e.errno in (errno.EACCES, errno.EAGAIN):
if not blocking or watch.expired():
return False
else:
raise _utils.RetryAgain()
else:
raise threading.ThreadError("Unable to acquire lock on"
" `%(path)s` due to"
" %(exception)s" %
{
'path': self.path,
'exception': e,
})
else:
return True
python类ThreadError()的实例源码
def release(self):
"""Release the previously acquired lock."""
if not self.acquired:
raise threading.ThreadError("Unable to release an unacquired"
" lock")
try:
self.unlock()
except IOError:
self.logger.exception("Could not unlock the acquired lock opened"
" on `%s`", self.path)
else:
self.acquired = False
try:
self._do_close()
except IOError:
self.logger.exception("Could not close the file handle"
" opened on `%s`", self.path)
else:
self.logger.log(_utils.BLATHER,
"Unlocked and closed file lock open on"
" `%s`", self.path)
def _get_my_tid(self):
"""determines this (self's) thread id"""
if not self.isAlive():
raise threading.ThreadError("the thread is not active")
# do we have it cached?
if hasattr(self, "_thread_id"):
return self._thread_id
# no, look for it in the _active dict
for tid, tobj in threading._active.items():
if tobj is self:
self._thread_id = tid
return tid
raise AssertionError("could not determine the thread's id")
def _try_acquire(self, blocking, watch):
try:
self.trylock()
except IOError as e:
if e.errno in (errno.EACCES, errno.EAGAIN):
if not blocking or watch.expired():
return False
else:
raise _utils.RetryAgain()
else:
raise threading.ThreadError("Unable to acquire lock on"
" `%(path)s` due to"
" %(exception)s" %
{
'path': self.path,
'exception': e,
})
else:
return True
def _get_my_tid(self):
"""determines this (self's) thread id"""
if not self.isAlive():
raise threading.ThreadError("the thread is not active")
# do we have it cached?
if hasattr(self, "_thread_id"):
return self._thread_id
# no, look for it in the _active dict
for tid, tobj in threading._active.items():
if tobj is self:
self._thread_id = tid
return tid
raise AssertionError("could not determine the thread's id")
def _get_my_tid(self):
"""determines this (self's) thread id
CAREFUL : this function is executed in the context of the caller
thread, to get the identity of the thread represented by this
instance.
"""
if not self.isAlive():
raise threading.ThreadError("the thread is not active")
# do we have it cached?
if hasattr(self, "_thread_id"):
return self._thread_id
# no, look for it in the _active dict
for tid, tobj in threading._active.items():
if tobj is self:
self._thread_id = tid
return tid
# TODO: in python 2.6, there's a simpler way to do : self.ident
raise AssertionError("could not determine the thread's id")
def _get_my_tid(self):
"""determines this (self's) thread id
CAREFUL : this function is executed in the context of the caller
thread, to get the identity of the thread represented by this
instance.
"""
if not self.isAlive():
raise threading.ThreadError("the thread is not active")
# do we have it cached?
if hasattr(self, "_thread_id"):
return self._thread_id
# no, look for it in the _active dict
for tid, tobj in threading._active.items():
if tobj is self:
self._thread_id = tid
return tid
# TODO: in python 2.6, there's a simpler way to do : self.ident
raise AssertionError("could not determine the thread's id")
def _try_acquire(self, blocking, watch):
try:
self.trylock()
except IOError as e:
if e.errno in (errno.EACCES, errno.EAGAIN):
if not blocking or watch.expired():
return False
else:
raise _utils.RetryAgain()
else:
raise threading.ThreadError("Unable to acquire lock on"
" `%(path)s` due to"
" %(exception)s" %
{
'path': self.path,
'exception': e,
})
else:
return True
def release(self):
"""Release the previously acquired lock."""
if not self.acquired:
raise threading.ThreadError("Unable to release an unacquired"
" lock")
try:
self.unlock()
except IOError:
self.logger.exception("Could not unlock the acquired lock opened"
" on `%s`", self.path)
else:
self.acquired = False
try:
self._do_close()
except IOError:
self.logger.exception("Could not close the file handle"
" opened on `%s`", self.path)
else:
self.logger.log(_utils.BLATHER,
"Unlocked and closed file lock open on"
" `%s`", self.path)
def test_bad_acquire(self):
lock_file = os.path.join(self.lock_dir, 'lock')
lock = BrokenLock(lock_file, errno.EBUSY)
self.assertRaises(threading.ThreadError, lock.acquire)
def test_bad_release(self):
lock_file = os.path.join(self.lock_dir, 'lock')
lock = pl.InterProcessLock(lock_file)
self.assertRaises(threading.ThreadError, lock.release)
def __enter__(self):
gotten = self.acquire()
if not gotten:
# This shouldn't happen, but just incase...
raise threading.ThreadError("Unable to acquire a file lock"
" on `%s` (when used as a"
" context manager)" % self.path)
return self
def test_lock(self):
lock = self.Lock()
self.assertEqual(lock.acquire(), True)
self.assertEqual(lock.acquire(False), False)
self.assertEqual(lock.release(), None)
self.assertRaises((ValueError, threading.ThreadError), lock.release)
def test_limbo_cleanup(self):
# Issue 7481: Failure to start thread should cleanup the limbo map.
def fail_new_thread(*args):
raise threading.ThreadError()
_start_new_thread = threading._start_new_thread
threading._start_new_thread = fail_new_thread
try:
t = threading.Thread(target=lambda: None)
self.assertRaises(threading.ThreadError, t.start)
self.assertFalse(
t in threading._limbo,
"Failed to cleanup _limbo map on failure of Thread.start().")
finally:
threading._start_new_thread = _start_new_thread
def test_lock(self):
lock = self.Lock()
self.assertEqual(lock.acquire(), True)
self.assertEqual(lock.acquire(False), False)
self.assertEqual(lock.release(), None)
self.assertRaises((ValueError, threading.ThreadError), lock.release)
def test_lock(self):
lock = self.Lock()
self.assertEqual(lock.acquire(), True)
self.assertEqual(lock.acquire(False), False)
self.assertEqual(lock.release(), None)
self.assertRaises((ValueError, threading.ThreadError), lock.release)
def acquire_lock(self, blocking=True):
if self.lock.acquire(blocking):
return True
elif blocking:
raise threading.ThreadError('Cannot acquire lock.')
else:
return False
def test_lock(self):
lock = self.Lock()
self.assertEqual(lock.acquire(), True)
self.assertEqual(lock.acquire(False), False)
self.assertEqual(lock.release(), None)
self.assertRaises((ValueError, threading.ThreadError), lock.release)
def test_limbo_cleanup(self):
# Issue 7481: Failure to start thread should cleanup the limbo map.
def fail_new_thread(*args):
raise threading.ThreadError()
_start_new_thread = threading._start_new_thread
threading._start_new_thread = fail_new_thread
try:
t = threading.Thread(target=lambda: None)
self.assertRaises(threading.ThreadError, t.start)
self.assertFalse(
t in threading._limbo,
"Failed to cleanup _limbo map on failure of Thread.start().")
finally:
threading._start_new_thread = _start_new_thread
def put(self, item):
"""Put a single item in the queue"""
with self._queue_mutex:
self._queue_content.append(item)
for w_idx in range(len(self._waiters)):
try:
self._waiters[w_idx].release()
except (ThreadError, RuntimeError, thread_error):
continue
else:
break
def __thread_apply__(f, args, callback):
try:
callback(f(*args))
except threading.ThreadError:
pass
def __thread_map__(f, iterable, callback):
try:
callback(map(f, iterable))
except threading.ThreadError:
pass
def terminate(self):
try:
if self._thread:
self._thread.raiseExc(threading.ThreadError)
except (threading.ThreadError, TypeError, ValueError, SystemError):
pass
self._thread = None
def __thread_map__(f, iterable, callback):
try:
callback(map(f, iterable))
except threading.ThreadError:
pass
def terminate(self):
try:
if self._thread:
self._thread.raiseExc(threading.ThreadError)
except (threading.ThreadError, TypeError, ValueError, SystemError):
pass
self._thread = None
def test_lock(self):
lock = self.Lock()
self.assertEqual(lock.acquire(), True)
self.assertEqual(lock.acquire(False), False)
self.assertEqual(lock.release(), None)
self.assertRaises((ValueError, threading.ThreadError), lock.release)
def test_lock(self):
lock = self.Lock()
self.assertEqual(lock.acquire(), True)
self.assertEqual(lock.acquire(False), False)
self.assertEqual(lock.release(), None)
self.assertRaises((ValueError, threading.ThreadError), lock.release)
def test_limbo_cleanup(self):
# Issue 7481: Failure to start thread should cleanup the limbo map.
def fail_new_thread(*args):
raise threading.ThreadError()
_start_new_thread = threading._start_new_thread
threading._start_new_thread = fail_new_thread
try:
t = threading.Thread(target=lambda: None)
self.assertRaises(threading.ThreadError, t.start)
self.assertFalse(
t in threading._limbo,
"Failed to cleanup _limbo map on failure of Thread.start().")
finally:
threading._start_new_thread = _start_new_thread
def _get_my_tid(self):
"""determines this (self's) thread id"""
if not self.isAlive():
raise threading.ThreadError("the thread is not active")
# do we have it cached?
if hasattr(self, "_thread_id"):
return self._thread_id
# no, look for it in the _active dict
for tid, tobj in threading._active.items():
if tobj is self:
self._thread_id = tid
return tid
raise AssertionError("could not determine the thread's id")
def test_lock(self):
lock = self.Lock()
self.assertEqual(lock.acquire(), True)
self.assertEqual(lock.acquire(False), False)
self.assertEqual(lock.release(), None)
self.assertRaises((ValueError, threading.ThreadError), lock.release)
