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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#include "Dispatcher.h"
#include <assert.h>
namespace qpid {
namespace sys {
Dispatcher::Dispatcher(Poller::shared_ptr poller0) :
poller(poller0) {
}
Dispatcher::~Dispatcher() {
}
void Dispatcher::run() {
do {
Poller::Event event = poller->wait();
// Poller::wait guarantees to return an event
DispatchHandle* h = static_cast<DispatchHandle*>(event.handle);
switch (event.dir) {
case Poller::IN:
h->readableCallback(*h);
break;
case Poller::OUT:
h->writableCallback(*h);
break;
case Poller::INOUT:
h->readableCallback(*h);
h->writableCallback(*h);
break;
case Poller::SHUTDOWN:
goto dispatcher_shutdown;
default:
;
}
} while (true);
dispatcher_shutdown:
;
}
void DispatchHandle::watch(Poller::shared_ptr poller0) {
bool r = readableCallback;
bool w = writableCallback;
// If no callbacks set then do nothing (that is what we were asked to do!)
// TODO: Maybe this should be an assert instead
if (!r && !w)
return;
Poller::Direction d = r ?
(w ? Poller::INOUT : Poller::IN) :
Poller::OUT;
poller = poller0;
poller->addFd(*this, d);
}
void DispatchHandle::rewatch() {
assert(poller);
poller->rearmFd(*this);
}
void DispatchHandle::unwatch() {
poller->delFd(*this);
poller.reset();
}
}}
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