예제 #1
0
파일: threading.py 프로젝트: conbon/Pydev
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()
예제 #2
0
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()
예제 #3
0
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()
예제 #4
0
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()
예제 #5
0
파일: threading.py 프로젝트: conbon/Pydev
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()
예제 #6
0
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()