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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.
*
*/
/**
* Use socketpair to test the poller
*/
#include "qpid/sys/IOHandle.h"
#include "qpid/sys/Poller.h"
#include "qpid/sys/posix/PrivatePosix.h"
#include <string>
#include <iostream>
#include <memory>
#include <exception>
#include <assert.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
using namespace std;
using namespace qpid::sys;
int writeALot(int fd, const string& s) {
int bytesWritten = 0;
do {
errno = 0;
int lastWrite = ::write(fd, s.c_str(), s.size());
if ( lastWrite >= 0) {
bytesWritten += lastWrite;
}
} while (errno != EAGAIN);
return bytesWritten;
}
int readALot(int fd) {
int bytesRead = 0;
char buf[1024];
do {
errno = 0;
int lastRead = ::read(fd, buf, sizeof(buf));
if ( lastRead >= 0) {
bytesRead += lastRead;
}
} while (errno != EAGAIN);
return bytesRead;
}
int main(int /*argc*/, char** /*argv*/)
{
try
{
int sv[2];
int rc = ::socketpair(AF_LOCAL, SOCK_STREAM, 0, sv);
assert(rc >= 0);
// Set non-blocking
rc = ::fcntl(sv[0], F_SETFL, O_NONBLOCK);
assert(rc >= 0);
rc = ::fcntl(sv[1], F_SETFL, O_NONBLOCK);
assert(rc >= 0);
// Make up a large string
string testString = "This is only a test ... 1,2,3,4,5,6,7,8,9,10;";
for (int i = 0; i < 6; i++)
testString += testString;
// Read as much as we can from socket 0
int bytesRead = readALot(sv[0]);
assert(bytesRead == 0);
cout << "Read(0): " << bytesRead << " bytes\n";
// Write as much as we can to socket 0
int bytesWritten = writeALot(sv[0], testString);
cout << "Wrote(0): " << bytesWritten << " bytes\n";
// Read as much as we can from socket 1
bytesRead = readALot(sv[1]);
assert(bytesRead == bytesWritten);
cout << "Read(1): " << bytesRead << " bytes\n";
auto_ptr<Poller> poller(new Poller);
PosixIOHandle f0(sv[0]);
PosixIOHandle f1(sv[1]);
PollerHandle h0(f0);
PollerHandle h1(f1);
poller->addFd(h0, Poller::INOUT);
// h0 should be writable
Poller::Event event = poller->wait();
assert(event.handle == &h0);
assert(event.type == Poller::WRITABLE);
// Write as much as we can to socket 0
bytesWritten = writeALot(sv[0], testString);
cout << "Wrote(0): " << bytesWritten << " bytes\n";
// Wait for 500ms - h0 no longer writable
poller->rearmFd(h0);
event = poller->wait(500000000);
assert(event.handle == 0);
// Test we can read it all now
poller->addFd(h1, Poller::INOUT);
event = poller->wait();
assert(event.handle == &h1);
assert(event.type == Poller::READ_WRITABLE);
// Can't interrupt, it's not active
assert(poller->interrupt(h1) == false);
bytesRead = readALot(sv[1]);
assert(bytesRead == bytesWritten);
cout << "Read(1): " << bytesRead << " bytes\n";
// Test poller interrupt
assert(poller->interrupt(h0) == true);
event = poller->wait();
assert(event.handle == &h0);
assert(event.type == Poller::INTERRUPTED);
assert(poller->interrupt(h0) == false);
// Test multiple interrupts
poller->rearmFd(h0);
poller->rearmFd(h1);
assert(poller->interrupt(h0) == true);
assert(poller->interrupt(h1) == true);
// Make sure we can't interrupt them again
assert(poller->interrupt(h0) == false);
assert(poller->interrupt(h1) == false);
// Make sure that they both come out in the correct order
event = poller->wait();
assert(event.handle == &h0);
assert(event.type == Poller::INTERRUPTED);
assert(poller->interrupt(h0) == false);
event = poller->wait();
assert(event.handle == &h1);
assert(event.type == Poller::INTERRUPTED);
assert(poller->interrupt(h1) == false);
// At this point h1 should have been disabled from the poller
// (as it was just returned) and h0 can write again
poller->rearmFd(h0);
event = poller->wait();
assert(event.handle == &h0);
assert(event.type == Poller::WRITABLE);
// Now both the handles should be disabled
event = poller->wait(500000000);
assert(event.handle == 0);
// Test shutdown
poller->shutdown();
event = poller->wait();
assert(event.handle == 0);
assert(event.type == Poller::SHUTDOWN);
event = poller->wait();
assert(event.handle == 0);
assert(event.type == Poller::SHUTDOWN);
poller->delFd(h1);
poller->delFd(h0);
return 0;
} catch (exception& e) {
cout << "Caught exception " << e.what() << "\n";
}
}
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