355 lines
8.0 KiB
C++
355 lines
8.0 KiB
C++
/*
|
|
* synergy -- mouse and keyboard sharing utility
|
|
* Copyright (C) 2004 Chris Schoeneman
|
|
*
|
|
* This package is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* found in the file COPYING that should have accompanied this file.
|
|
*
|
|
* This package is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include "CSocketMultiplexer.h"
|
|
#include "ISocketMultiplexerJob.h"
|
|
#include "CCondVar.h"
|
|
#include "CLock.h"
|
|
#include "CMutex.h"
|
|
#include "CThread.h"
|
|
#include "CLog.h"
|
|
#include "TMethodJob.h"
|
|
#include "CArch.h"
|
|
#include "XArch.h"
|
|
#include "stdvector.h"
|
|
|
|
//
|
|
// CSocketMultiplexer
|
|
//
|
|
|
|
CSocketMultiplexer* CSocketMultiplexer::s_instance = NULL;
|
|
|
|
CSocketMultiplexer::CSocketMultiplexer() :
|
|
m_mutex(new CMutex),
|
|
m_thread(NULL),
|
|
m_update(false),
|
|
m_jobsReady(new CCondVar<bool>(m_mutex, false)),
|
|
m_jobListLock(new CCondVar<bool>(m_mutex, false)),
|
|
m_jobListLockLocked(new CCondVar<bool>(m_mutex, false)),
|
|
m_jobListLocker(NULL),
|
|
m_jobListLockLocker(NULL)
|
|
{
|
|
assert(s_instance == NULL);
|
|
|
|
// this pointer just has to be unique and not NULL. it will
|
|
// never be dereferenced. it's used to identify cursor nodes
|
|
// in the jobs list.
|
|
m_cursorMark = reinterpret_cast<ISocketMultiplexerJob*>(this);
|
|
|
|
// start thread
|
|
m_thread = new CThread(new TMethodJob<CSocketMultiplexer>(
|
|
this, &CSocketMultiplexer::serviceThread));
|
|
|
|
s_instance = this;
|
|
}
|
|
|
|
CSocketMultiplexer::~CSocketMultiplexer()
|
|
{
|
|
m_thread->cancel();
|
|
m_thread->unblockPollSocket();
|
|
m_thread->wait();
|
|
delete m_thread;
|
|
delete m_jobsReady;
|
|
delete m_jobListLock;
|
|
delete m_jobListLockLocked;
|
|
delete m_jobListLocker;
|
|
delete m_jobListLockLocker;
|
|
delete m_mutex;
|
|
|
|
// clean up jobs
|
|
for (CSocketJobMap::iterator i = m_socketJobMap.begin();
|
|
i != m_socketJobMap.end(); ++i) {
|
|
delete *(i->second);
|
|
}
|
|
|
|
s_instance = NULL;
|
|
}
|
|
|
|
CSocketMultiplexer*
|
|
CSocketMultiplexer::getInstance()
|
|
{
|
|
return s_instance;
|
|
}
|
|
|
|
void
|
|
CSocketMultiplexer::addSocket(ISocket* socket, ISocketMultiplexerJob* job)
|
|
{
|
|
assert(socket != NULL);
|
|
assert(job != NULL);
|
|
|
|
// prevent other threads from locking the job list
|
|
lockJobListLock();
|
|
|
|
// break thread out of poll
|
|
m_thread->unblockPollSocket();
|
|
|
|
// lock the job list
|
|
lockJobList();
|
|
|
|
// insert/replace job
|
|
CSocketJobMap::iterator i = m_socketJobMap.find(socket);
|
|
if (i == m_socketJobMap.end()) {
|
|
// we *must* put the job at the end so the order of jobs in
|
|
// the list continue to match the order of jobs in pfds in
|
|
// serviceThread().
|
|
CJobCursor j = m_socketJobs.insert(m_socketJobs.end(), job);
|
|
m_update = true;
|
|
m_socketJobMap.insert(std::make_pair(socket, j));
|
|
}
|
|
else {
|
|
CJobCursor j = i->second;
|
|
if (*j != job) {
|
|
delete *j;
|
|
*j = job;
|
|
}
|
|
m_update = true;
|
|
}
|
|
|
|
// unlock the job list
|
|
unlockJobList();
|
|
}
|
|
|
|
void
|
|
CSocketMultiplexer::removeSocket(ISocket* socket)
|
|
{
|
|
assert(socket != NULL);
|
|
|
|
// prevent other threads from locking the job list
|
|
lockJobListLock();
|
|
|
|
// break thread out of poll
|
|
m_thread->unblockPollSocket();
|
|
|
|
// lock the job list
|
|
lockJobList();
|
|
|
|
// remove job. rather than removing it from the map we put NULL
|
|
// in the list instead so the order of jobs in the list continues
|
|
// to match the order of jobs in pfds in serviceThread().
|
|
CSocketJobMap::iterator i = m_socketJobMap.find(socket);
|
|
if (i != m_socketJobMap.end()) {
|
|
if (*(i->second) != NULL) {
|
|
delete *(i->second);
|
|
*(i->second) = NULL;
|
|
m_update = true;
|
|
}
|
|
}
|
|
|
|
// unlock the job list
|
|
unlockJobList();
|
|
}
|
|
|
|
void
|
|
CSocketMultiplexer::serviceThread(void*)
|
|
{
|
|
std::vector<IArchNetwork::CPollEntry> pfds;
|
|
IArchNetwork::CPollEntry pfd;
|
|
|
|
// service the connections
|
|
for (;;) {
|
|
CThread::testCancel();
|
|
|
|
// wait until there are jobs to handle
|
|
{
|
|
CLock lock(m_mutex);
|
|
while (!(bool)*m_jobsReady) {
|
|
m_jobsReady->wait();
|
|
}
|
|
}
|
|
|
|
// lock the job list
|
|
lockJobListLock();
|
|
lockJobList();
|
|
|
|
// collect poll entries
|
|
if (m_update) {
|
|
m_update = false;
|
|
pfds.clear();
|
|
pfds.reserve(m_socketJobMap.size());
|
|
|
|
CJobCursor cursor = newCursor();
|
|
CJobCursor jobCursor = nextCursor(cursor);
|
|
while (jobCursor != m_socketJobs.end()) {
|
|
ISocketMultiplexerJob* job = *jobCursor;
|
|
if (job != NULL) {
|
|
pfd.m_socket = job->getSocket();
|
|
pfd.m_events = 0;
|
|
if (job->isReadable()) {
|
|
pfd.m_events |= IArchNetwork::kPOLLIN;
|
|
}
|
|
if (job->isWritable()) {
|
|
pfd.m_events |= IArchNetwork::kPOLLOUT;
|
|
}
|
|
pfds.push_back(pfd);
|
|
}
|
|
jobCursor = nextCursor(cursor);
|
|
}
|
|
deleteCursor(cursor);
|
|
}
|
|
|
|
int status;
|
|
try {
|
|
// check for status
|
|
status = ARCH->pollSocket(&pfds[0], pfds.size(), -1);
|
|
}
|
|
catch (XArchNetwork& e) {
|
|
LOG((CLOG_WARN "error in socket multiplexer: %s", e.what().c_str()));
|
|
status = 0;
|
|
}
|
|
|
|
if (status != 0) {
|
|
// iterate over socket jobs, invoking each and saving the
|
|
// new job.
|
|
UInt32 i = 0;
|
|
CJobCursor cursor = newCursor();
|
|
CJobCursor jobCursor = nextCursor(cursor);
|
|
while (i < pfds.size() && jobCursor != m_socketJobs.end()) {
|
|
if (*jobCursor != NULL) {
|
|
// get poll state
|
|
unsigned short revents = pfds[i].m_revents;
|
|
bool read = ((revents & IArchNetwork::kPOLLIN) != 0);
|
|
bool write = ((revents & IArchNetwork::kPOLLOUT) != 0);
|
|
bool error = ((revents & (IArchNetwork::kPOLLERR |
|
|
IArchNetwork::kPOLLNVAL)) != 0);
|
|
|
|
// run job
|
|
ISocketMultiplexerJob* job = *jobCursor;
|
|
ISocketMultiplexerJob* newJob = job->run(read, write, error);
|
|
|
|
// save job, if different
|
|
if (newJob != job) {
|
|
CLock lock(m_mutex);
|
|
delete job;
|
|
*jobCursor = newJob;
|
|
m_update = true;
|
|
}
|
|
++i;
|
|
}
|
|
|
|
// next job
|
|
jobCursor = nextCursor(cursor);
|
|
}
|
|
deleteCursor(cursor);
|
|
}
|
|
|
|
// delete any removed socket jobs
|
|
for (CSocketJobMap::iterator i = m_socketJobMap.begin();
|
|
i != m_socketJobMap.end();) {
|
|
if (*(i->second) == NULL) {
|
|
m_socketJobMap.erase(i++);
|
|
m_update = true;
|
|
}
|
|
else {
|
|
++i;
|
|
}
|
|
}
|
|
|
|
// unlock the job list
|
|
unlockJobList();
|
|
}
|
|
}
|
|
|
|
CSocketMultiplexer::CJobCursor
|
|
CSocketMultiplexer::newCursor()
|
|
{
|
|
CLock lock(m_mutex);
|
|
return m_socketJobs.insert(m_socketJobs.begin(), m_cursorMark);
|
|
}
|
|
|
|
CSocketMultiplexer::CJobCursor
|
|
CSocketMultiplexer::nextCursor(CJobCursor cursor)
|
|
{
|
|
CLock lock(m_mutex);
|
|
CJobCursor j = m_socketJobs.end();
|
|
CJobCursor i = cursor;
|
|
while (++i != m_socketJobs.end()) {
|
|
if (*i != m_cursorMark) {
|
|
// found a real job (as opposed to a cursor)
|
|
j = i;
|
|
|
|
// move our cursor just past the job
|
|
m_socketJobs.splice(++i, m_socketJobs, cursor);
|
|
break;
|
|
}
|
|
}
|
|
return j;
|
|
}
|
|
|
|
void
|
|
CSocketMultiplexer::deleteCursor(CJobCursor cursor)
|
|
{
|
|
CLock lock(m_mutex);
|
|
m_socketJobs.erase(cursor);
|
|
}
|
|
|
|
void
|
|
CSocketMultiplexer::lockJobListLock()
|
|
{
|
|
CLock lock(m_mutex);
|
|
|
|
// wait for the lock on the lock
|
|
while (*m_jobListLockLocked) {
|
|
m_jobListLockLocked->wait();
|
|
}
|
|
|
|
// take ownership of the lock on the lock
|
|
*m_jobListLockLocked = true;
|
|
m_jobListLockLocker = new CThread(CThread::getCurrentThread());
|
|
}
|
|
|
|
void
|
|
CSocketMultiplexer::lockJobList()
|
|
{
|
|
CLock lock(m_mutex);
|
|
|
|
// make sure we're the one that called lockJobListLock()
|
|
assert(*m_jobListLockLocker == CThread::getCurrentThread());
|
|
|
|
// wait for the job list lock
|
|
while (*m_jobListLock) {
|
|
m_jobListLock->wait();
|
|
}
|
|
|
|
// take ownership of the lock
|
|
*m_jobListLock = true;
|
|
m_jobListLocker = m_jobListLockLocker;
|
|
m_jobListLockLocker = NULL;
|
|
|
|
// release the lock on the lock
|
|
*m_jobListLockLocked = false;
|
|
m_jobListLockLocked->broadcast();
|
|
}
|
|
|
|
void
|
|
CSocketMultiplexer::unlockJobList()
|
|
{
|
|
CLock lock(m_mutex);
|
|
|
|
// make sure we're the one that called lockJobList()
|
|
assert(*m_jobListLocker == CThread::getCurrentThread());
|
|
|
|
// release the lock
|
|
delete m_jobListLocker;
|
|
m_jobListLocker = NULL;
|
|
*m_jobListLock = false;
|
|
m_jobListLock->signal();
|
|
|
|
// set new jobs ready state
|
|
bool isReady = !m_socketJobMap.empty();
|
|
if (*m_jobsReady != isReady) {
|
|
*m_jobsReady = isReady;
|
|
m_jobsReady->signal();
|
|
}
|
|
}
|