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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 "PosixEventNotifierImpl.h"
#include "qpid/log/Statement.h"
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#define BUFFER_SIZE 10
using namespace qmf;
PosixEventNotifierImpl::PosixEventNotifierImpl(AgentSession& agentSession)
: EventNotifierImpl(agentSession)
{
openHandle();
}
PosixEventNotifierImpl::PosixEventNotifierImpl(ConsoleSession& consoleSession)
: EventNotifierImpl(consoleSession)
{
openHandle();
}
PosixEventNotifierImpl::~PosixEventNotifierImpl()
{
closeHandle();
}
void PosixEventNotifierImpl::update(bool readable)
{
char buffer[BUFFER_SIZE];
if(readable && !this->isReadable()) {
if (::write(myHandle, "1", 1) == -1)
QPID_LOG(error, "PosixEventNotifierImpl::update write failed: " << errno);
}
else if(!readable && this->isReadable()) {
if (::read(yourHandle, buffer, BUFFER_SIZE) == -1)
QPID_LOG(error, "PosixEventNotifierImpl::update read failed: " << errno);
}
}
void PosixEventNotifierImpl::openHandle()
{
int pair[2];
if(::pipe(pair) == -1)
throw QmfException("Unable to open event notifier handle.");
yourHandle = pair[0];
myHandle = pair[1];
int flags;
flags = ::fcntl(yourHandle, F_GETFL);
if((::fcntl(yourHandle, F_SETFL, flags | O_NONBLOCK)) == -1)
throw QmfException("Unable to make remote handle non-blocking.");
flags = ::fcntl(myHandle, F_GETFL);
if((::fcntl(myHandle, F_SETFL, flags | O_NONBLOCK)) == -1)
throw QmfException("Unable to make local handle non-blocking.");
}
void PosixEventNotifierImpl::closeHandle()
{
if(myHandle > 0) {
::close(myHandle);
myHandle = -1;
}
if(yourHandle > 0) {
::close(yourHandle);
yourHandle = -1;
}
}
PosixEventNotifierImpl& PosixEventNotifierImplAccess::get(posix::EventNotifier& notifier)
{
return *notifier.impl;
}
const PosixEventNotifierImpl& PosixEventNotifierImplAccess::get(const posix::EventNotifier& notifier)
{
return *notifier.impl;
}
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