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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include "include/types.h"
#include "WorkQueue.h"
#include "config.h"
#define DOUT_SUBSYS tp
#undef dout_prefix
#define dout_prefix *_dout << name << " "
void ThreadPool::worker()
{
_lock.Lock();
dout(10) << "worker start" << dendl;
while (!_stop) {
if (!_pause && work_queues.size()) {
WorkQueue_* wq;
int tries = work_queues.size();
bool did = false;
while (tries--) {
last_work_queue++;
last_work_queue %= work_queues.size();
wq = work_queues[last_work_queue];
void *item = wq->_void_dequeue();
if (item) {
processing++;
dout(12) << "worker wq " << wq->name << " start processing " << item << dendl;
_lock.Unlock();
wq->_void_process(item);
_lock.Lock();
wq->_void_process_finish(item);
dout(15) << "worker wq " << wq->name << " done processing " << item << dendl;
processing--;
if (_pause || _draining)
_wait_cond.Signal();
did = true;
break;
}
}
if (did)
continue;
}
dout(15) << "worker waiting" << dendl;
_cond.Wait(_lock);
}
dout(0) << "worker finish" << dendl;
_lock.Unlock();
}
void ThreadPool::start()
{
dout(10) << "start" << dendl;
for (set<WorkThread*>::iterator p = _threads.begin();
p != _threads.end();
p++)
(*p)->create();
dout(15) << "started" << dendl;
}
void ThreadPool::stop(bool clear_after)
{
dout(10) << "stop" << dendl;
_lock.Lock();
_stop = true;
_cond.Signal();
_lock.Unlock();
for (set<WorkThread*>::iterator p = _threads.begin();
p != _threads.end();
p++)
(*p)->join();
_lock.Lock();
for (unsigned i=0; i<work_queues.size(); i++)
work_queues[i]->_clear();
_lock.Unlock();
dout(15) << "stopped" << dendl;
}
void ThreadPool::pause()
{
dout(10) << "pause" << dendl;
_lock.Lock();
assert(!_pause);
_pause = true;
while (processing)
_wait_cond.Wait(_lock);
_lock.Unlock();
dout(15) << "paused" << dendl;
}
void ThreadPool::pause_new()
{
dout(10) << "pause_new" << dendl;
_lock.Lock();
assert(!_pause);
_pause = true;
_lock.Unlock();
}
void ThreadPool::unpause()
{
dout(10) << "unpause" << dendl;
_lock.Lock();
assert(_pause);
_pause = false;
_cond.Signal();
_lock.Unlock();
}
void ThreadPool::drain(WorkQueue_* wq)
{
dout(10) << "drain" << dendl;
_lock.Lock();
_draining++;
while (processing || (wq != NULL && !wq->_empty()))
_wait_cond.Wait(_lock);
_draining--;
_lock.Unlock();
}
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