mirror of https://gitlab.com/ita1024/waf.git
45 lines
910 B
Python
45 lines
910 B
Python
#! /usr/bin/env python
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"""
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Task semaphore demo. Compare the runtimes:
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waf configure build --fast # 0m08
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waf configure build # 1m15
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"""
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import random, time
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from waflib import Task, TaskGen, Utils
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def options(opt):
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opt.add_option('--fast', action='store_true', default=False, help='Disable the semaphore to compare the runtime', dest='fast')
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def configure(conf):
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pass
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def build(bld):
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# max 20 jobs globally
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bld.jobs = 20
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bld(features='make_100')
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class Foo(Task.Task):
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always_run = True
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if not bld.options.fast:
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semaphore = Task.TaskSemaphore(2) # 2 jobs maximum
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def uid(self):
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# unique id for each object
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return Utils.h_list(self.num)
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def run(self):
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time.sleep(random.randint(1000, 2000) / 1000.)
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print("Task %r" % self.num)
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@TaskGen.feature('make_100')
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def make_100_bound_tasks(self):
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for x in range(100):
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tsk = self.create_task('Foo')
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tsk.num = x
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