diff options
| -rw-r--r-- | Demo/threads/Generator.py | 142 |
1 files changed, 71 insertions, 71 deletions
diff --git a/Demo/threads/Generator.py b/Demo/threads/Generator.py index fbba06a..a2713af 100644 --- a/Demo/threads/Generator.py +++ b/Demo/threads/Generator.py @@ -5,80 +5,80 @@ import thread Killed = 'Generator.Killed' class Generator: - # Constructor - def __init__(self, func, args): - self.getlock = thread.allocate_lock() - self.putlock = thread.allocate_lock() - self.getlock.acquire() - self.putlock.acquire() - self.func = func - self.args = args - self.done = 0 - self.killed = 0 - thread.start_new_thread(self._start, ()) - # Internal routine - def _start(self): - try: - self.putlock.acquire() - if not self.killed: - try: - apply(self.func, (self,) + self.args) - except Killed: - pass - finally: - if not self.killed: - self.done = 1 - self.getlock.release() - # Called by producer for each value; raise Killed if no more needed - def put(self, value): - if self.killed: - raise TypeError, 'put() called on killed generator' - self.value = value - self.getlock.release() # Resume consumer thread - self.putlock.acquire() # Wait for next get() call - if self.killed: - raise Killed - # Called by producer to get next value; raise EOFError if no more - def get(self): - if self.killed: - raise TypeError, 'get() called on killed generator' - self.putlock.release() # Resume producer thread - self.getlock.acquire() # Wait for value to appear - if self.done: - raise EOFError # Say there are no more values - return self.value - # Called by consumer if no more values wanted - def kill(self): - if self.killed: - raise TypeError, 'kill() called on killed generator' - self.killed = 1 - self.putlock.release() - # Clone constructor - def clone(self): - return Generator(self.func, self.args) + # Constructor + def __init__(self, func, args): + self.getlock = thread.allocate_lock() + self.putlock = thread.allocate_lock() + self.getlock.acquire() + self.putlock.acquire() + self.func = func + self.args = args + self.done = 0 + self.killed = 0 + thread.start_new_thread(self._start, ()) + # Internal routine + def _start(self): + try: + self.putlock.acquire() + if not self.killed: + try: + apply(self.func, (self,) + self.args) + except Killed: + pass + finally: + if not self.killed: + self.done = 1 + self.getlock.release() + # Called by producer for each value; raise Killed if no more needed + def put(self, value): + if self.killed: + raise TypeError, 'put() called on killed generator' + self.value = value + self.getlock.release() # Resume consumer thread + self.putlock.acquire() # Wait for next get() call + if self.killed: + raise Killed + # Called by producer to get next value; raise EOFError if no more + def get(self): + if self.killed: + raise TypeError, 'get() called on killed generator' + self.putlock.release() # Resume producer thread + self.getlock.acquire() # Wait for value to appear + if self.done: + raise EOFError # Say there are no more values + return self.value + # Called by consumer if no more values wanted + def kill(self): + if self.killed: + raise TypeError, 'kill() called on killed generator' + self.killed = 1 + self.putlock.release() + # Clone constructor + def clone(self): + return Generator(self.func, self.args) def pi(g): - k, a, b, a1, b1 = 2L, 4L, 1L, 12L, 4L - while 1: - # Next approximation - p, q, k = k*k, 2L*k+1L, k+1L - a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1 - # Print common digits - d, d1 = a/b, a1/b1 - while d == d1: - g.put(int(d)) - a, a1 = 10L*(a%b), 10L*(a1%b1) - d, d1 = a/b, a1/b1 + k, a, b, a1, b1 = 2L, 4L, 1L, 12L, 4L + while 1: + # Next approximation + p, q, k = k*k, 2L*k+1L, k+1L + a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1 + # Print common digits + d, d1 = a/b, a1/b1 + while d == d1: + g.put(int(d)) + a, a1 = 10L*(a%b), 10L*(a1%b1) + d, d1 = a/b, a1/b1 def test(): - g = Generator(pi, ()) - g.kill() - g = Generator(pi, ()) - for i in range(10): print g.get(), - print - h = g.clone() - g.kill() - while 1: - print h.get(), + g = Generator(pi, ()) + g.kill() + g = Generator(pi, ()) + for i in range(10): print g.get(), + print + h = g.clone() + g.kill() + while 1: + print h.get(), test() |