def _init_worker():
"""
Initializer for pooled processes.
"""
# Try to lower the CPU usage priority as much as possible.
try:
import posix
posix.nice(99)
except Exception:
pass
def operate(self,**kwargs):
self.runningThreads+=1
r, w = os.pipe()
pid = os.fork()
if pid: # PARENT
os.close(w)
tmpParam = kwargs[self.parameter]
r = os.fdopen(r, 'rb')
try: tmpResult = cPickle.load(r)
except:
try: posix.kill(pid, -1) # Kill the child
except: pass
if self.verbose: self.write("An error occured in job "+str(pid)) # Tell the reader
self.jobs.append(kwargs[self.parameter]) # Append the job to be done later
self.runningThreads -= 1 # Tell your master that you've one it
self.sigPause.set()
return
os.waitpid(pid, 0)
else: # CHILD
posix.nice(self.nice)
os.close(r)
w = os.fdopen(w, 'wb')
cPickle.dump(self.function(**kwargs), w, 2)
w.close()
sys.exit(0)
self.writeLock.acquire()
self.operate_return(tmpParam, tmpResult)
self.runningThreads -= 1
self.sigPause.set()
self.writeLock.release()
