scheduler.py

Sun, 28 Jan 2018 11:01:45 +0000

author
Tuomo Valkonen <tuomov@iki.fi>
date
Sun, 28 Jan 2018 11:01:45 +0000
changeset 77
e8773133bf79
parent 76
4b08fca3ce34
child 78
83b43987e61e
permissions
-rw-r--r--

DreamTime.monotonic() no longer needs to call time.monotonic()
so is more "static" within wakeup periods, and so comparable to
time.monotonic() realisations. Also some PyObjC weirdness handling.

49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
1 #
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
2 # Scheduler for Borgend
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
3 #
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
4 # This module simply provide a way for other threads to until a given time
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
5 #
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
6
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
7 import time
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
8 import borgend
76
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
9 import sleep
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
10 from threading import Condition, Lock, Thread
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
11
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
12 logger=borgend.logger.getChild(__name__)
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
13
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
14 class QueuedEvent:
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
15 def __init__(self, cond, name=None):
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
16 self.next=None
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
17 self.prev=None
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
18 self.name=name
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
19 self.cond=cond
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
20
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
21 def __lt__(self, other):
54
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
22 raise NotImplementedError
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
23
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
24 def insert_after(self, ev):
69
8705e296c7a0 Scheduling list fix and simplifications
Tuomo Valkonen <tuomov@iki.fi>
parents: 59
diff changeset
25 if not self.next or ev<self.next:
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
26 self.insert_immediately_after(ev)
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
27 else:
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
28 self.next.insert_after(ev)
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
29
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
30 def insert_immediately_after(self, ev):
69
8705e296c7a0 Scheduling list fix and simplifications
Tuomo Valkonen <tuomov@iki.fi>
parents: 59
diff changeset
31 assert(ev.next is None and ev.prev is None)
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
32 ev.prev=self
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
33 ev.next=self.next
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
34 self.next=ev
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
35
69
8705e296c7a0 Scheduling list fix and simplifications
Tuomo Valkonen <tuomov@iki.fi>
parents: 59
diff changeset
36 def insert_immediately_before(self, ev):
8705e296c7a0 Scheduling list fix and simplifications
Tuomo Valkonen <tuomov@iki.fi>
parents: 59
diff changeset
37 assert(ev.next is None and ev.prev is None)
8705e296c7a0 Scheduling list fix and simplifications
Tuomo Valkonen <tuomov@iki.fi>
parents: 59
diff changeset
38 ev.next=self
8705e296c7a0 Scheduling list fix and simplifications
Tuomo Valkonen <tuomov@iki.fi>
parents: 59
diff changeset
39 ev.prev=self.prev
8705e296c7a0 Scheduling list fix and simplifications
Tuomo Valkonen <tuomov@iki.fi>
parents: 59
diff changeset
40 self.prev=ev
8705e296c7a0 Scheduling list fix and simplifications
Tuomo Valkonen <tuomov@iki.fi>
parents: 59
diff changeset
41
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
42 def unlink(self):
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
43 n=self.next
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
44 p=self.prev
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
45 if n:
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
46 n.prev=p
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
47 if p:
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
48 p.next=n
76
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
49 self.next=None
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
50 self.prev=None
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
51
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
52 class ScheduledEvent(QueuedEvent):
76
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
53 #@accepts(ScheduledEvent, sleep.Time, threading.Cond, str)
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
54 def __init__(self, when, cond, name=None):
54
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
55 super().__init__(cond, name=name)
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
56 self.when=when
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
57
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
58 def __lt__(self, other):
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
59 return self.when < other.when
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
60
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
61 class TerminableThread(Thread):
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
62 def __init__(self, *args, **kwargs):
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
63 super().__init__(*args, **kwargs)
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
64 self._terminate=False
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
65 self._cond=Condition()
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
66
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
67 def terminate(self):
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
68 with self._cond:
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
69 _terminate=True
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
70 self._cond.notify()
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
71
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
72 class QueueThread(TerminableThread):
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
73 def __init__(self, *args, **kwargs):
54
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
74 super().__init__(*args, **kwargs)
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
75 self.daemon = True
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
76 self._list = None
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
77
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
78 def _insert(self, ev):
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
79 if not self._list:
75
2a44b9649212 UI refresh fix; added debug messages
Tuomo Valkonen <tuomov@iki.fi>
parents: 69
diff changeset
80 #logger.debug("Insert first")
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
81 self._list=ev
54
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
82 elif ev<self._list:
75
2a44b9649212 UI refresh fix; added debug messages
Tuomo Valkonen <tuomov@iki.fi>
parents: 69
diff changeset
83 #logger.debug("Insert beginning")
69
8705e296c7a0 Scheduling list fix and simplifications
Tuomo Valkonen <tuomov@iki.fi>
parents: 59
diff changeset
84 self._list.insert_immediately_before(ev)
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
85 self._list=ev
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
86 else:
75
2a44b9649212 UI refresh fix; added debug messages
Tuomo Valkonen <tuomov@iki.fi>
parents: 69
diff changeset
87 #logger.debug("Insert after")
59
8d0a815022cc Oops, accidentally calling the wrong function (+log message clarification)
Tuomo Valkonen <tuomov@iki.fi>
parents: 55
diff changeset
88 self._list.insert_after(ev)
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
89
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
90 self._cond.notify()
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
91
54
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
92 def _unlink(self, ev):
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
93 if ev==self._list:
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
94 self._list=ev.next
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
95 ev.unlink()
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
96
76
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
97 def _resort(self):
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
98 oldlist=self._list
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
99 self._list=None
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
100 while oldlist:
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
101 ev=oldlist
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
102 oldlist=oldlist.next
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
103 ev.unlink()
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
104 self._insert(ev)
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
105
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
106
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
107
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
108 class Scheduler(QueueThread):
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
109 # Default to precision of 60 seconds: the scheduler thread will never
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
110 # sleep longer than that, to get quickly back on track with the schedule
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
111 # when the computer wakes up from sleep
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
112 def __init__(self, precision=60):
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
113 self.precision = precision
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
114 self._next_event_time = None
54
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
115 super().__init__(target = self._scheduler_thread, name = 'Scheduler')
76
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
116 sleep.add_callback(self, self._wakeup_callback)
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
117
54
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
118 def _scheduler_thread(self):
75
2a44b9649212 UI refresh fix; added debug messages
Tuomo Valkonen <tuomov@iki.fi>
parents: 69
diff changeset
119 logger.debug("Scheduler thread started")
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
120 with self._cond:
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
121 while not self._terminate:
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
122 now = time.monotonic()
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
123 if not self._list:
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
124 timeout = None
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
125 else:
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
126 # Wait at most precision seconds, or until next event if it
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
127 # comes earlier
76
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
128 timeout=min(self.precision, self._list.when.realtime()-now)
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
129
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
130 if not timeout or timeout>0:
75
2a44b9649212 UI refresh fix; added debug messages
Tuomo Valkonen <tuomov@iki.fi>
parents: 69
diff changeset
131 logger.debug("Scheduler waiting %d seconds" % (timeout or (-1)))
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
132 self._cond.wait(timeout)
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
133 now = time.monotonic()
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
134
75
2a44b9649212 UI refresh fix; added debug messages
Tuomo Valkonen <tuomov@iki.fi>
parents: 69
diff changeset
135 logger.debug("Scheduler timed out")
2a44b9649212 UI refresh fix; added debug messages
Tuomo Valkonen <tuomov@iki.fi>
parents: 69
diff changeset
136
76
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
137 while self._list and self._list.when.monotonic() <= now:
54
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
138 ev=self._list
59
8d0a815022cc Oops, accidentally calling the wrong function (+log message clarification)
Tuomo Valkonen <tuomov@iki.fi>
parents: 55
diff changeset
139 logger.debug("Scheduler activating %s" % (ev.name or "(unknown)"))
54
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
140 # We are only allowed to remove ev from list when ev.cond allows
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
141 with ev.cond:
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
142 self._list=ev.next
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
143 ev.unlink()
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
144 ev.cond.notifyAll()
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
145
76
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
146 def _wakeup_callback(self):
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
147 logger.debug("Rescheduling events after wakeup")
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
148 with self._cond:
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
149 self._resort()
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
150
54
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
151 def _wait(self, ev):
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
152 with self._cond:
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
153 self._insert(ev)
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
154
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
155 # This will release the lock on cond, allowing queue manager (scheduler)
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
156 # thread to notify us if we are already to be released
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
157 ev.cond.wait()
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
158
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
159 # If we were woken up by some other event, not the scheduler,
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
160 # ensure the event is removed
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
161 with self._cond:
cfcaa5f6ba33 Basic repository queue
Tuomo Valkonen <tuomov@iki.fi>
parents: 53
diff changeset
162 self._unlink(ev)
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
163
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
164 # cond has to be acquired on entry!
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
165 def wait_until(self, when, cond, name=None):
76
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
166 logger.debug("Scheduling '%s' in %s seconds [%s]" %
4b08fca3ce34 Dreamtime scheduling: discount system sleep periods
Tuomo Valkonen <tuomov@iki.fi>
parents: 75
diff changeset
167 (name, when.seconds_to(), when.__class__.__name__))
53
442c558bd632 Generalisation of scheduler thread to general queue threads
Tuomo Valkonen <tuomov@iki.fi>
parents: 49
diff changeset
168 self._wait(ScheduledEvent(when, cond, name))
49
db33dfa64ad6 Improved scheduler
Tuomo Valkonen <tuomov@iki.fi>
parents:
diff changeset
169

mercurial