|
| 1 | +import time |
| 2 | +import heapq |
| 3 | + |
| 4 | + |
| 5 | +def coroutine(f): |
| 6 | + return f |
| 7 | + |
| 8 | + |
| 9 | +def get_event_loop(): |
| 10 | + return EventLoop() |
| 11 | + |
| 12 | + |
| 13 | +class EventLoop: |
| 14 | + |
| 15 | + def __init__(self): |
| 16 | + self.q = [] |
| 17 | + self.cnt = 0 |
| 18 | + |
| 19 | + def time(self): |
| 20 | + return time.time() |
| 21 | + |
| 22 | + def call_soon(self, callback, *args): |
| 23 | + self.call_at(0, callback, *args) |
| 24 | + |
| 25 | + def call_later(self, delay, callback, *args): |
| 26 | + self.call_at(self.time() + delay, callback, *args) |
| 27 | + |
| 28 | + def call_at(self, time, callback, *args): |
| 29 | +# self.q.append((callback, args)) |
| 30 | + # self.cnt is workaround per heapq docs |
| 31 | +# print("Scheduling", (time, self.cnt, callback, args)) |
| 32 | + heapq.heappush(self.q, (time, self.cnt, callback, args)) |
| 33 | +# print(self.q) |
| 34 | + self.cnt += 1 |
| 35 | + |
| 36 | +# def run_forever(self): |
| 37 | +# while self.q: |
| 38 | +# c = self.q.pop(0) |
| 39 | +# c[0](*c[1]) |
| 40 | + |
| 41 | + def run_forever(self): |
| 42 | + while self.q: |
| 43 | +# t, cnt, cb, args = self.q.pop(0) |
| 44 | + t, cnt, cb, args = heapq.heappop(self.q) |
| 45 | + tnow = self.time() |
| 46 | + delay = t - tnow |
| 47 | + if delay > 0: |
| 48 | +# print("Sleeping for:", delay) |
| 49 | + time.sleep(delay) |
| 50 | + delay = 0 |
| 51 | + try: |
| 52 | + ret = next(cb) |
| 53 | +# print("ret:", ret) |
| 54 | + if isinstance(ret, Sleep): |
| 55 | + delay = ret.args[0] |
| 56 | + except StopIteration as e: |
| 57 | + print(c, "finished") |
| 58 | + continue |
| 59 | + #self.q.append(c) |
| 60 | + self.call_later(delay, cb, *args) |
| 61 | + |
| 62 | + def run_until_complete(self, coro): |
| 63 | + val = None |
| 64 | + while True: |
| 65 | + try: |
| 66 | + ret = coro.send(val) |
| 67 | + except StopIteration as e: |
| 68 | + print(e) |
| 69 | + break |
| 70 | + print("ret:", ret) |
| 71 | + if isinstance(ret, SysCall): |
| 72 | + ret.handle() |
| 73 | + |
| 74 | + def close(self): |
| 75 | + pass |
| 76 | + |
| 77 | + |
| 78 | +class SysCall: |
| 79 | + |
| 80 | + def __init__(self, call, *args): |
| 81 | + self.call = call |
| 82 | + self.args = args |
| 83 | + |
| 84 | +class Sleep(SysCall): |
| 85 | + |
| 86 | + def handle(self): |
| 87 | + time.sleep(self.args[0]) |
| 88 | + |
| 89 | + |
| 90 | +def sleep(secs): |
| 91 | + yield Sleep("sleep", secs) |
| 92 | + |
| 93 | +def sleep2(secs): |
| 94 | + t = time.time() |
| 95 | +# print("Started sleep:", t, "targetting:", t + secs) |
| 96 | + while time.time() < t + secs: |
| 97 | + time.sleep(0.01) |
| 98 | + yield None |
| 99 | +# print("Finished sleeping", secs) |
| 100 | +# time.sleep(secs) |
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