1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
# encoding: utf-8
# Thomas Nagy, 2005-2008 (ita)
# this replaces the core of Runner.py in waf with a varient that works
# on systems with completely broken threading (such as Python 2.5.x on
# AIX). For simplicity we enable this when JOBS=1, which is triggered
# by the compatibility makefile used for the waf build. That also ensures
# this code is tested, as it means it is used in the build farm, and by
# anyone using 'make' to build Samba with waf
"Execute the tasks"
import sys, random, threading
try: from Queue import Queue
except ImportError: from queue import Queue
import Utils, Options
from Constants import EXCEPTION, CRASHED, MAXJOBS, ASK_LATER, SKIPPED, SKIP_ME, SUCCESS
GAP = 15
run_old = threading.Thread.run
def run(*args, **kwargs):
try:
run_old(*args, **kwargs)
except (KeyboardInterrupt, SystemExit):
raise
except:
sys.excepthook(*sys.exc_info())
threading.Thread.run = run
class TaskConsumer(object):
consumers = 1
def process(tsk):
m = tsk.master
if m.stop:
m.out.put(tsk)
return
try:
tsk.generator.bld.printout(tsk.display())
if tsk.__class__.stat: ret = tsk.__class__.stat(tsk)
# actual call to task's run() function
else: ret = tsk.call_run()
except Exception, e:
tsk.err_msg = Utils.ex_stack()
tsk.hasrun = EXCEPTION
# TODO cleanup
m.error_handler(tsk)
m.out.put(tsk)
return
if ret:
tsk.err_code = ret
tsk.hasrun = CRASHED
else:
try:
tsk.post_run()
except Utils.WafError:
pass
except Exception:
tsk.err_msg = Utils.ex_stack()
tsk.hasrun = EXCEPTION
else:
tsk.hasrun = SUCCESS
if tsk.hasrun != SUCCESS:
m.error_handler(tsk)
m.out.put(tsk)
class Parallel(object):
"""
keep the consumer threads busy, and avoid consuming cpu cycles
when no more tasks can be added (end of the build, etc)
"""
def __init__(self, bld, j=2):
# number of consumers
self.numjobs = j
self.manager = bld.task_manager
self.manager.current_group = 0
self.total = self.manager.total()
# tasks waiting to be processed - IMPORTANT
self.outstanding = []
self.maxjobs = MAXJOBS
# tasks that are awaiting for another task to complete
self.frozen = []
# tasks returned by the consumers
self.out = Queue(0)
self.count = 0 # tasks not in the producer area
self.processed = 1 # progress indicator
self.stop = False # error condition to stop the build
self.error = False # error flag
def get_next(self):
"override this method to schedule the tasks in a particular order"
if not self.outstanding:
return None
return self.outstanding.pop(0)
def postpone(self, tsk):
"override this method to schedule the tasks in a particular order"
# TODO consider using a deque instead
if random.randint(0, 1):
self.frozen.insert(0, tsk)
else:
self.frozen.append(tsk)
def refill_task_list(self):
"called to set the next group of tasks"
while self.count > self.numjobs + GAP or self.count >= self.maxjobs:
self.get_out()
while not self.outstanding:
if self.count:
self.get_out()
if self.frozen:
self.outstanding += self.frozen
self.frozen = []
elif not self.count:
(jobs, tmp) = self.manager.get_next_set()
if jobs is not None:
self.maxjobs = jobs
if tmp:
self.outstanding += tmp
break
def get_out(self):
"the tasks that are put to execute are all collected using get_out"
ret = self.out.get()
self.manager.add_finished(ret)
if not self.stop and getattr(ret, 'more_tasks', None):
self.outstanding += ret.more_tasks
self.total += len(ret.more_tasks)
self.count -= 1
def error_handler(self, tsk):
"by default, errors make the build stop (not thread safe so be careful)"
if not Options.options.keep:
self.stop = True
self.error = True
def start(self):
"execute the tasks"
while not self.stop:
self.refill_task_list()
# consider the next task
tsk = self.get_next()
if not tsk:
if self.count:
# tasks may add new ones after they are run
continue
else:
# no tasks to run, no tasks running, time to exit
break
if tsk.hasrun:
# if the task is marked as "run", just skip it
self.processed += 1
self.manager.add_finished(tsk)
continue
try:
st = tsk.runnable_status()
except Exception, e:
self.processed += 1
if self.stop and not Options.options.keep:
tsk.hasrun = SKIPPED
self.manager.add_finished(tsk)
continue
self.error_handler(tsk)
self.manager.add_finished(tsk)
tsk.hasrun = EXCEPTION
tsk.err_msg = Utils.ex_stack()
continue
if st == ASK_LATER:
self.postpone(tsk)
elif st == SKIP_ME:
self.processed += 1
tsk.hasrun = SKIPPED
self.manager.add_finished(tsk)
else:
# run me: put the task in ready queue
tsk.position = (self.processed, self.total)
self.count += 1
self.processed += 1
tsk.master = self
process(tsk)
# self.count represents the tasks that have been made available to the consumer threads
# collect all the tasks after an error else the message may be incomplete
while self.error and self.count:
self.get_out()
#print loop
assert (self.count == 0 or self.stop)
# enable nothreads
import Runner
Runner.process = process
Runner.Parallel = Parallel
|
