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# Copyright 2018 the V8 project authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import collections
import traceback
from . import base
from ..local import pool
# Global function for multiprocessing, because pickling a static method doesn't
# work on Windows.
def run_job(job, process_context):
return job.run(process_context)
def create_process_context(result_reduction):
return ProcessContext(result_reduction)
JobResult = collections.namedtuple('JobResult', ['id', 'result'])
ProcessContext = collections.namedtuple('ProcessContext', ['result_reduction'])
class Job(object):
def __init__(self, test_id, cmd, outproc, keep_output):
self.test_id = test_id
self.cmd = cmd
self.outproc = outproc
self.keep_output = keep_output
def run(self, process_ctx):
output = self.cmd.execute()
reduction = process_ctx.result_reduction if not self.keep_output else None
result = self.outproc.process(output, reduction)
return JobResult(self.test_id, result)
class ExecutionProc(base.TestProc):
"""Last processor in the chain. Instead of passing tests further it creates
commands and output processors, executes them in multiple worker processes and
sends results to the previous processor.
"""
def __init__(self, jobs, outproc_factory=None):
super(ExecutionProc, self).__init__()
self._pool = pool.Pool(jobs, notify_fun=self.notify_previous)
self._outproc_factory = outproc_factory or (lambda t: t.output_proc)
self._tests = {}
def connect_to(self, next_proc):
assert False, 'ExecutionProc cannot be connected to anything'
def run(self):
it = self._pool.imap_unordered(
fn=run_job,
gen=[],
process_context_fn=create_process_context,
process_context_args=[self._prev_requirement],
)
for pool_result in it:
self._unpack_result(pool_result)
def next_test(self, test):
if self.is_stopped:
return False
test_id = test.procid
cmd = test.get_command()
self._tests[test_id] = test, cmd
outproc = self._outproc_factory(test)
self._pool.add([Job(test_id, cmd, outproc, test.keep_output)])
return True
def result_for(self, test, result):
assert False, 'ExecutionProc cannot receive results'
def stop(self):
super(ExecutionProc, self).stop()
self._pool.abort()
def _unpack_result(self, pool_result):
if pool_result.heartbeat:
self.heartbeat()
return
job_result = pool_result.value
test_id, result = job_result
test, result.cmd = self._tests[test_id]
del self._tests[test_id]
self._send_result(test, result)