class _Semaphore(_Verbose):
# After Tim Peters' semaphore class, but not quite the same (no maximum)
def __init__(self, value=1, verbose=None):
if value < 0:
raise ValueError("Semaphore initial value must be >= 0")
_Verbose.__init__(self, verbose)
self.__cond = Condition(Lock())
self.__value = value
def acquire(self, blocking=1):
rc = False
self.__cond.acquire()
while self.__value == 0:
if not blocking:
break
if __debug__:
self._note("%s.acquire(%s): blocked waiting, value=%s", self, blocking, self.__value)
self.__cond.wait()
else:
self.__value = self.__value - 1
if __debug__:
self._note("%s.acquire: success, value=%s", self, self.__value)
rc = True
self.__cond.release()
return rc
def release(self):
self.__cond.acquire()
self.__value = self.__value + 1
if __debug__:
self._note("%s.release: success, value=%s", self, self.__value)
self.__cond.notify()
self.__cond.release()
class _Semaphore(_Verbose):
# After Tim Peters' semaphore class, but not quite the same (no maximum)
def __init__(self, value=1, verbose=None):
assert value >= 0, "Semaphore initial value must be >= 0"
_Verbose.__init__(self, verbose)
self.__cond = Condition(Lock())
self.__value = value
def acquire(self, blocking=1):
rc = False
self.__cond.acquire()
while self.__value == 0:
if not blocking:
break
if __debug__:
self._note("%s.acquire(%s): blocked waiting, value=%s", self,
blocking, self.__value)
self.__cond.wait()
else:
self.__value = self.__value - 1
if __debug__:
self._note("%s.acquire: success, value=%s", self, self.__value)
rc = True
self.__cond.release()
return rc
def release(self):
self.__cond.acquire()
self.__value = self.__value + 1
if __debug__:
self._note("%s.release: success, value=%s", self, self.__value)
self.__cond.notify()
self.__cond.release()
class _Event(_Verbose):
# After Tim Peters' event class (without is_posted())
def __init__(self, verbose=None):
_Verbose.__init__(self, verbose)
self.__cond = Condition(Lock())
self.__flag = False
def isSet(self):
return self.__flag
def set(self):
self.__cond.acquire()
try:
self.__flag = True
self.__cond.notifyAll()
finally:
self.__cond.release()
def clear(self):
self.__cond.acquire()
try:
self.__flag = False
finally:
self.__cond.release()
def wait(self, timeout=None):
self.__cond.acquire()
try:
if not self.__flag:
self.__cond.wait(timeout)
finally:
self.__cond.release()
class _Event(_Verbose):
# After Tim Peters' event class (without is_posted())
def __init__(self, verbose=None):
_Verbose.__init__(self, verbose)
self.__cond = Condition(Lock())
self.__flag = False
def isSet(self):
return self.__flag
def set(self):
self.__cond.acquire()
try:
self.__flag = True
self.__cond.notifyAll()
finally:
self.__cond.release()
def clear(self):
self.__cond.acquire()
try:
self.__flag = False
finally:
self.__cond.release()
def wait(self, timeout=None):
self.__cond.acquire()
try:
if not self.__flag:
self.__cond.wait(timeout)
finally:
self.__cond.release()
class _Event(_Verbose):
# After Tim Peters' event class (without is_posted())
def __init__(self, verbose=None):
_Verbose.__init__(self, verbose)
self.__cond = Condition(Lock())
self.__flag = False
def isSet(self):
return self.__flag
is_set = isSet
def set(self):
self.__cond.acquire()
try:
self.__flag = True
self.__cond.notifyAll()
finally:
self.__cond.release()
def clear(self):
self.__cond.acquire()
try:
self.__flag = False
finally:
self.__cond.release()
def wait(self, timeout=None):
self.__cond.acquire()
try:
if not self.__flag:
self.__cond.wait(timeout)
# Issue 2005: Since CPython 2.7, threading.Event.wait(timeout) returns boolean.
# The function should return False if timeout is reached before the event is set.
return self.__flag
finally:
self.__cond.release()
class _Event(_Verbose):
# After Tim Peters' event class (without is_posted())
def __init__(self, verbose=None):
_Verbose.__init__(self, verbose)
self.__cond = Condition(Lock())
self.__flag = False
def isSet(self):
return self.__flag
is_set = isSet
def set(self):
self.__cond.acquire()
try:
self.__flag = True
self.__cond.notifyAll()
finally:
self.__cond.release()
def clear(self):
self.__cond.acquire()
try:
self.__flag = False
finally:
self.__cond.release()
def wait(self, timeout=None):
self.__cond.acquire()
try:
if not self.__flag:
self.__cond.wait(timeout)
# Issue 2005: Since CPython 2.7, threading.Event.wait(timeout) returns boolean.
# The function should return False if timeout is reached before the event is set.
return self.__flag
finally:
self.__cond.release()
