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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) 2004-2012 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.
*
*/
#ifndef CEPH_LIBRADOS_POOLASYNCCOMPLETIONIMPL_H
#define CEPH_LIBRADOS_POOLASYNCCOMPLETIONIMPL_H
#include "common/ceph_mutex.h"
#include <boost/intrusive_ptr.hpp>
#include "include/rados/librados.h"
#include "include/rados/librados.hpp"
namespace librados {
struct PoolAsyncCompletionImpl {
ceph::mutex lock = ceph::make_mutex("PoolAsyncCompletionImpl lock");
ceph::condition_variable cond;
int ref = 1;
int rval = 0;
bool released = false;
bool done = false;
rados_callback_t callback = nullptr;
void *callback_arg = nullptr;
PoolAsyncCompletionImpl() = default;
int set_callback(void *cb_arg, rados_callback_t cb) {
std::scoped_lock l(lock);
callback = cb;
callback_arg = cb_arg;
return 0;
}
int wait() {
std::unique_lock l(lock);
while (!done)
cond.wait(l);
return 0;
}
int is_complete() {
std::scoped_lock l(lock);
return done;
}
int get_return_value() {
std::scoped_lock l(lock);
return rval;
}
void get() {
std::scoped_lock l(lock);
ceph_assert(ref > 0);
ref++;
}
void release() {
std::scoped_lock l(lock);
ceph_assert(!released);
released = true;
}
void put() {
std::unique_lock l(lock);
int n = --ref;
l.unlock();
if (!n)
delete this;
}
};
inline void intrusive_ptr_add_ref(PoolAsyncCompletionImpl* p) {
p->get();
}
inline void intrusive_ptr_release(PoolAsyncCompletionImpl* p) {
p->put();
}
class CB_PoolAsync_Safe {
boost::intrusive_ptr<PoolAsyncCompletionImpl> p;
public:
explicit CB_PoolAsync_Safe(boost::intrusive_ptr<PoolAsyncCompletionImpl> p)
: p(p) {}
~CB_PoolAsync_Safe() = default;
void operator()(int r) {
auto c(std::move(p));
std::unique_lock l(c->lock);
c->rval = r;
c->done = true;
c->cond.notify_all();
if (c->callback) {
rados_callback_t cb = c->callback;
void *cb_arg = c->callback_arg;
l.unlock();
cb(c.get(), cb_arg);
l.lock();
}
}
};
}
#endif
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