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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/Cond.h"
#include "common/Mutex.h"
#include "include/Context.h"
#include "include/rados/librados.h"
#include "include/rados/librados.hpp"
namespace librados {
struct PoolAsyncCompletionImpl {
Mutex lock;
Cond cond;
int ref, rval;
bool released;
bool done;
rados_callback_t callback;
void *callback_arg;
PoolAsyncCompletionImpl() : lock("PoolAsyncCompletionImpl lock"),
ref(1), rval(0), released(false), done(false),
callback(0), callback_arg(0) {}
int set_callback(void *cb_arg, rados_callback_t cb) {
lock.Lock();
callback = cb;
callback_arg = cb_arg;
lock.Unlock();
return 0;
}
int wait() {
lock.Lock();
while (!done)
cond.Wait(lock);
lock.Unlock();
return 0;
}
int is_complete() {
lock.Lock();
int r = done;
lock.Unlock();
return r;
}
int get_return_value() {
lock.Lock();
int r = rval;
lock.Unlock();
return r;
}
void get() {
lock.Lock();
assert(ref > 0);
ref++;
lock.Unlock();
}
void release() {
lock.Lock();
assert(!released);
released = true;
put_unlock();
}
void put() {
lock.Lock();
put_unlock();
}
void put_unlock() {
assert(ref > 0);
int n = --ref;
lock.Unlock();
if (!n)
delete this;
}
};
class C_PoolAsync_Safe : public Context {
PoolAsyncCompletionImpl *c;
public:
C_PoolAsync_Safe(PoolAsyncCompletionImpl *_c) : c(_c) {
c->get();
}
void finish(int r) {
c->lock.Lock();
c->rval = r;
c->done = true;
c->cond.Signal();
if (c->callback) {
rados_callback_t cb = c->callback;
void *cb_arg = c->callback_arg;
c->lock.Unlock();
cb(c, cb_arg);
c->lock.Lock();
}
c->put_unlock();
}
};
}
#endif
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