static ACE_THR_FUNC_RETURN
asynchronous_signal_handler (void *)
{
ACE_Sig_Set sigset;
// Register signal handlers.
if (child)
{
sigset.sig_add (SIGINT);
sigset.sig_add (SIGTERM);
}
else
{
sigset.sig_add (SIGCHLD);
sigset.sig_add (SIGHUP);
}
// Register the <handle_signal> method to process all the signals in
// <sigset>.
ACE_Sig_Action sa (sigset,
(ACE_SignalHandler) handle_signal);
ACE_UNUSED_ARG (sa);
return 0;
}
bool
Lorica::Proxy::setup_shutdown_handler(void)
{
ACE_Sig_Set sigset;
// Register signal handlers.
sigset.sig_add(SIGINT);
sigset.sig_add(SIGUSR1);
sigset.sig_add(SIGUSR2);
sigset.sig_add(SIGTERM);
// Register the <handle_signal> method to process all the signals in
// <sigset>.
ACE_Sig_Action sa(sigset,
(ACE_SignalHandler)Lorica::signal_handler);
ACE_UNUSED_ARG(sa);
return true;
}
static ACE_THR_FUNC_RETURN
synchronous_signal_handler (void *)
{
ACE_Sig_Set sigset;
// Register signal handlers.
if (child)
{
sigset.sig_add (SIGINT);
sigset.sig_add (SIGTERM);
}
else
sigset.sig_add (SIGHUP);
for (;;)
{
// Block waiting for SIGINT, SIGTERM, or SIGHUP, depending on
// whether we're the parent or child process.
int signr = ACE_OS::sigwait (sigset);
if (signr == -1)
{
if (errno != EINTR)
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("(%P|%t) %p\n"),
ACE_TEXT ("sigwait")));
continue;
}
if (handle_signal (signr) == -1)
break;
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("(%P|%t) handled signal\n")));
}
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("(%P|%t) synchronous signal handler done\n")));
return 0;
}
// Listing 3
// Listing 2 code/ch11
static void register_actions ()
{
ACE_TRACE ("::register_actions");
ACE_Sig_Action sa (reinterpret_cast <ACE_SignalHandler> (my_sighandler));
// Make sure we specify that SIGUSR1 will be masked out
// during the signal handler's execution.
ACE_Sig_Set ss;
ss.sig_add (SIGUSR1);
sa.mask (ss);
// Register the same handler function for these
// two signals.
sa.register_action (SIGUSR1);
sa.register_action (SIGUSR2);
}
int main(int argc, char *argv[]){
if (argc > 1){
cout << "Please do not use command!" << endl;
return TOO_MANY_COMMANDS_ERROR;
}
cout << argv[0] << endl;
Server server;
ACE_Reactor::instance()->register_handler(&server, ACE_Event_Handler::ACCEPT_MASK);
ACE_Sig_Set sigset;
sigset.sig_add(SIGINT);
ACE_Reactor::instance()->register_handler(sigset, &server);
ACE_Reactor::instance()->register_handler(&server, ACE_Event_Handler::SIGNAL_MASK);
ACE_Reactor::instance()->run_reactor_event_loop();
return SUCCESS;
}
static void
register_signal_handlers (void)
{
// Register SIGQUIT (never blocked).
ACE_Sig_Action sigquit ((ACE_SignalHandler) signal_handler,
SIGQUIT);
ACE_UNUSED_ARG (sigquit);
// Don't let the SIGALRM interrupt the SIGINT handler!
ACE_Sig_Set ss;
ss.sig_add (SIGALRM);
// Register SIGINT (note that system calls will be restarted
// automatically).
ACE_Sig_Action sigint ((ACE_SignalHandler) signal_handler,
SIGINT,
ss,
SA_RESTART);
ACE_UNUSED_ARG (sigint);
}
int ACE_TMAIN (int, ACE_TCHAR *[])
{
MySignalHandler sighandler;
ACE_Sig_Handler sh;
sh.register_handler (SIGUSR1, &sighandler);
ACE_Sig_Set ss;
ss.sig_add (SIGUSR1);
ACE_Sig_Guard guard (&ss);
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Entering critical region\n")));
ACE_OS::sleep (10);
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("Leaving critical region\n")));
}
// Do other stuff.
return 0;
}
int
ACE_TMAIN (int argc, ACE_TCHAR *argv[])
{
try
{
// The usual server side boilerplate code.
CORBA::ORB_var orb = CORBA::ORB_init (argc, argv);
CORBA::Object_var obj =
orb->resolve_initial_references ("RootPOA");
PortableServer::POA_var root_poa =
PortableServer::POA::_narrow (obj.in ());
PortableServer::POAManager_var poa_manager =
root_poa->the_POAManager ();
poa_manager->activate ();
// "built-in" strategies are the following:
// 0 = RoundRobin
// 1 = Random
// 2 = LeastLoaded
int default_strategy = 1;
// Check the non-ORB arguments.
::parse_args (argc,
argv,
default_strategy);
TAO_LB_LoadManager * lm = 0;
ACE_NEW_THROW_EX (lm,
TAO_LB_LoadManager(::ping_timeout_milliseconds,
::ping_interval_seconds),
CORBA::NO_MEMORY (
CORBA::SystemException::_tao_minor_code (
TAO::VMCID,
ENOMEM),
CORBA::COMPLETED_NO));
PortableServer::ServantBase_var safe_lm = lm;
// Initalize the LoadManager servant.
lm->initialize (orb->orb_core ()->reactor (),
orb.in (),
root_poa.in ());
PortableGroup::Properties props (1);
props.length (1);
props[0].nam.length (1);
props[0].nam[0].id =
CORBA::string_dup ("org.omg.CosLoadBalancing.StrategyInfo");
CosLoadBalancing::StrategyInfo strategy_info;
switch (default_strategy)
{
case 0:
strategy_info.name = CORBA::string_dup ("RoundRobin");
break;
case 1:
strategy_info.name = CORBA::string_dup ("Random");
break;
case 2:
strategy_info.name = CORBA::string_dup ("LeastLoaded");
break;
default:
ORBSVCS_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("ERROR: LoadBalancer internal error.\n")
ACE_TEXT (" Unknown built-in strategy.\n")),
-1);
}
props[0].val <<= strategy_info;
lm->set_default_properties (props);
CosLoadBalancing::LoadManager_var load_manager =
lm->_this ();
CORBA::String_var str =
orb->object_to_string (load_manager.in ());
// to support corbaloc
// Get a reference to the IOR table.
CORBA::Object_var tobj = orb->resolve_initial_references ("IORTable");
IORTable::Table_var table = IORTable::Table::_narrow (tobj.in ());
// bind your stringified IOR in the IOR table
table->bind ("LoadManager", str.in ());
FILE * lm_ior = ACE_OS::fopen (lm_ior_file, "w");
ACE_OS::fprintf (lm_ior, "%s", str.in ());
ACE_OS::fclose (lm_ior);
#if defined (linux) && defined (ACE_HAS_THREADS)
if (ACE_Thread_Manager::instance ()->spawn (::TAO_LB_run_load_manager,
orb.in ()) == -1)
{
ORBSVCS_ERROR_RETURN ((LM_ERROR,
"ERROR: Unable to spawn TAO LoadManager's "
"ORB thread.\n"),
-1);
}
ACE_Sig_Set sigset;
sigset.sig_add (SIGINT);
sigset.sig_add (SIGTERM);
int signum = -1;
// Block waiting for the registered signals.
if (ACE_OS::sigwait (sigset, &signum) == -1)
{
ORBSVCS_ERROR_RETURN ((LM_ERROR,
"(%P|%t) %p\n",
"ERROR waiting on signal"),
-1);
}
ACE_ASSERT (signum == SIGINT || signum == SIGTERM);
#else
// Activate/register the signal handler that (attempts) to
// ensure graceful shutdown of the LoadManager so that remote
// resources created by the LoadManager can be cleaned up.
TAO_LB_Signal_Handler signal_handler (orb.in (), root_poa.in ());
if (signal_handler.activate () != 0)
{
ORBSVCS_ERROR_RETURN ((LM_ERROR,
"Error: can't activate LB signal handler, exiting.\n"),
-1);
}
// @@ There is a subtle race condition here. If the signal
// handler thread shuts down the ORB before it is run, the
// below call to ORB::run() will throw a CORBA::BAD_INV_ORDER
// exception.
orb->run ();
// Wait for the signal handler thread to finish
// before the process exits.
signal_handler.wait ();
#endif /* linux && ACE_HAS_THREADS */
orb->destroy ();
}
// catch (const PortableGroup::InvalidProperty& ex)
// {
// ORBSVCS_DEBUG ((LM_DEBUG, "Property ----> %s\n", ex.nam[0].id.in ()));
// }
catch (const CORBA::Exception& ex)
{
ex._tao_print_exception ("TAO Load Manager");
return -1;
}
return 0;
}
int
ACE_Service_Config::open_i (const ACE_TCHAR program_name[],
const ACE_TCHAR *logger_key,
bool ,
bool ,
bool )
{
ACE_TRACE ("ACE_Service_Config::open_i");
ACE_MT (ACE_GUARD_RETURN (ACE_SYNCH_MUTEX, ace_mon, this->lock_, -1));
ACE_Log_Msg *log_msg = ACE_LOG_MSG;
if(ACE::debug ())
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("ACE (%P|%t) SC::open_i - this=%@, opened=%d\n"),
this, this->is_opened_));
// Guard against reentrant processing.
if(this->is_opened_)
return 0;
this->is_opened_ = true;
// Check for things we need to do on a per-process basis and which
// may not be safe, or wise to do an a per instance basis
// Become a daemon before doing anything else.
if(ACE_Service_Config::be_a_daemon_)
ACE::daemonize ();
// Write process id to file.
if(this->pid_file_name_ != 0)
{
FILE* pidf = ACE_OS::fopen (this->pid_file_name_,
ACE_TEXT("w"));
if(pidf != 0)
{
ACE_OS::fprintf (pidf,
"%ld\n",
static_cast<long> (ACE_OS::getpid()));
ACE_OS::fclose (pidf);
}
}
u_long flags = log_msg->flags ();
// Only use STDERR if the caller hasn't already set the flags.
if(flags == 0)
flags = (u_long) ACE_Log_Msg::STDERR;
const ACE_TCHAR *key = logger_key;
if(key == 0 || ACE_OS::strcmp (key, ACE_DEFAULT_LOGGER_KEY) == 0)
{
// Only use the static <logger_key_> if the caller doesn't
// override it in the parameter list or if the key supplied is
// equal to the default static logger key.
key = ACE_Service_Config::current()->logger_key_;
}
else
{
ACE_SET_BITS (flags, ACE_Log_Msg::LOGGER);
}
if(log_msg->open (program_name,
flags,
key) == -1)
return -1;
if(ACE::debug ())
ACE_DEBUG ((LM_STARTUP,
ACE_TEXT ("starting up daemon %n\n")));
// Initialize the Service Repository (this will still work if
// user forgets to define an object of type ACE_Service_Config).
ACE_Service_Repository::instance (ACE_Service_Gestalt::MAX_SERVICES);
// Initialize the ACE_Reactor (the ACE_Reactor should be the
// same size as the ACE_Service_Repository).
ACE_Reactor::instance ();
// There's no point in dealing with this on NT since it doesn't
// really support signals very well...
#if !defined (ACE_LACKS_UNIX_SIGNALS)
// Only attempt to register a signal handler for positive
// signal numbers.
if(ACE_Service_Config::signum_ > 0)
{
ACE_Sig_Set ss;
ss.sig_add (ACE_Service_Config::signum_);
if((ACE_Reactor::instance () != 0) &&
(ACE_Reactor::instance ()->register_handler
(ss, ACE_Service_Config::signal_handler_) == -1))
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("can't register signal handler\n")));
}
#endif /* ACE_LACKS_UNIX_SIGNALS */
return 0;
}
int
ACE_Service_Config::open_i (const ACE_TCHAR program_name[],
const ACE_TCHAR *logger_key,
bool ignore_static_svcs,
bool ignore_default_svc_conf_file,
bool ignore_debug_flag)
{
int result = 0;
ACE_TRACE ("ACE_Service_Config::open_i");
ACE_Log_Msg *log_msg = ACE_LOG_MSG;
if (ACE::debug ())
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("(%P|%t) SC::open_i - this=%@, opened=%d, ")
ACE_TEXT ("loadstatics=%d\n"),
this, this->is_opened_, this->no_static_svcs_));
// Guard against reentrant processing. For example,
// if the singleton gestalt (ubergestalt) was already open,
// do not open it again...
// The base class open_i increments this and we are
// forwarding to it, so we don't have to increment here.
if (this->is_opened_ != 0)
return ACE_Service_Gestalt::open_i (program_name,
logger_key,
ignore_static_svcs,
ignore_default_svc_conf_file,
ignore_debug_flag);
// Check for things we need to do on a per-process basis and which
// may not be safe, or wise to do an a per instance basis
// Override any defaults, if required
this->no_static_svcs_ = ignore_static_svcs;
// Become a daemon before doing anything else.
if (this->be_a_daemon_)
ACE::daemonize ();
// Write process id to file.
if (this->pid_file_name_ != 0)
{
FILE* pidf = ACE_OS::fopen (this->pid_file_name_,
ACE_TEXT("w"));
if (pidf != 0)
{
ACE_OS::fprintf (pidf,
"%ld\n",
static_cast<long> (ACE_OS::getpid()));
ACE_OS::fclose (pidf);
}
}
u_long flags = log_msg->flags ();
// Only use STDERR if the caller hasn't already set the flags.
if (flags == 0)
flags = (u_long) ACE_Log_Msg::STDERR;
const ACE_TCHAR *key = logger_key;
if (key == 0 || ACE_OS::strcmp (key, ACE_DEFAULT_LOGGER_KEY) == 0)
// Only use the static <logger_key_> if the caller doesn't
// override it in the parameter list or if the key supplied is
// equal to the default static logger key.
key = this->logger_key_;
else
ACE_SET_BITS (flags, ACE_Log_Msg::LOGGER);
if (log_msg->open (program_name,
flags,
key) == -1)
result = -1;
else
{
if (ACE::debug ())
ACE_DEBUG ((LM_STARTUP,
ACE_TEXT ("starting up daemon %n\n")));
// Initialize the Service Repository (this will still work if
// user forgets to define an object of type ACE_Service_Config).
ACE_Service_Repository::instance (ACE_Service_Config::MAX_SERVICES);
// Initialize the ACE_Reactor (the ACE_Reactor should be the
// same size as the ACE_Service_Repository).
ACE_Reactor::instance ();
// There's no point in dealing with this on NT since it doesn't
// really support signals very well...
#if !defined (ACE_LACKS_UNIX_SIGNALS)
// Only attempt to register a signal handler for positive
// signal numbers.
if (ACE_Service_Config::signum_ > 0)
{
ACE_Sig_Set ss;
ss.sig_add (ACE_Service_Config::signum_);
if (ACE_Reactor::instance ()->register_handler
(ss, ACE_Service_Config::signal_handler_) == -1)
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("can't register signal handler\n")));
}
#endif /* ACE_LACKS_UNIX_SIGNALS */
}
if (result == -1)
return -1;
if (this->init_svc_conf_file_queue () == -1)
return -1;
// Check if the default file exists before attempting to queue it
// for processing
if (!ignore_default_svc_conf_file)
{
FILE *fp = ACE_OS::fopen (ACE_DEFAULT_SVC_CONF,
ACE_TEXT ("r"));
ignore_default_svc_conf_file = (fp == 0);
if (fp != 0)
ACE_OS::fclose (fp);
}
if (!ignore_default_svc_conf_file
&& this->svc_conf_file_queue_->is_empty ())
{
// Load the default "svc.conf" entry here if there weren't
// overriding -f arguments in <parse_args>.
if (this->svc_conf_file_queue_->enqueue_tail
(ACE_TString (ACE_DEFAULT_SVC_CONF)) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("enqueuing ")
ACE_DEFAULT_SVC_CONF
ACE_TEXT(" file")),
-1);
}
}
return ACE_Service_Gestalt::open_i (program_name,
logger_key,
ignore_static_svcs,
ignore_default_svc_conf_file,
ignore_debug_flag);
}
int main(int argc, char *argv[])
{
int rc = 0;
bool first = true;
ImageVector v;
Client client(argc, argv);
if ((rc = parseArgs(argc, argv)))
return rc;
try {
// event handler
Event * event = new Event();
// Signal set to be handled by the event handler.
ACE_Sig_Set sig;
// register Signal handler for Ctr+C
sig.sig_add(SIGINT);
sig.sig_add(SIGTERM);
// Reactor, misused as signal handler
ACE_Reactor reactor;
if (reactor.register_handler(sig, event) == -1) {
throw Miro::ACE_Exception(errno, "failed to register signal handler");
}
// get reference to video service
Video_var video = client.resolveName<Video>(interfaceName.c_str());
Miro::VideoConnection connection(video.in());
ACE_Time_Value start;
while(!canceled) {
// wait for key
if (first || !streaming) {
first = false;
cout << "Press key to grab next image: " << flush;
getchar();
start = ACE_OS::gettimeofday();
}
// init streaming timer
if (!first && streaming) {
ACE_Time_Value elapsed = ACE_OS::gettimeofday();
elapsed -= start;
if (elapsed.msec() > stop)
break;
}
{
// get image
Miro::VideoAcquireImage
frame(connection,
(interval)?
Miro::VideoAcquireImage::Current :
Miro::VideoAcquireImage::Next);
// fill image structure
Image image;
image.fileName = path() + client.namingContextName + "_" + Miro::timeString() + ".ppm";
image.width = connection.handle->format.width;
image.height = connection.handle->format.height;
// fill image buffer
if (!bgr && !streaming)
image.buffer = (char*) frame.buffer;
else {
image.buffer = new char[3 * image.width * image.height];
// byte swapping
if (bgr) {
int offset = 0;
for (int i = 0; i < image.width; ++i) {
for (int j = 0; j < image.height; ++j, offset += 3) {
image.buffer[offset + 0] = frame.buffer[offset + 2]; // r
image.buffer[offset + 1] = frame.buffer[offset + 1]; // g
image.buffer[offset + 2] = frame.buffer[offset + 0]; // b
}
}
}
else
memcpy(image.buffer, frame.buffer, 3 * image.width * image.height);
}
// save image
if (!streaming) {
image.writePpm();
if (bgr)
delete[] image.buffer;
}
else
v.push_back(image);
}
// sleep
if (interval) {
ACE_Time_Value delta;
delta.msec(interval);
ACE_OS::sleep(delta);
}
}
cout << "exiting on signal" << endl;
for (ImageVector::const_iterator i = v.begin(); i != v.end(); ++i) {
i->writePpm();
delete i->buffer;
}
}
catch (const Miro::ETimeOut& e) {
cerr << "Miro Timeout Exception: " << e << endl;
rc = 1;
}
catch (const Miro::EDevIO & e) {
cerr << "Miro Device I/O exception: " << e << endl;
rc = 1;
}
catch (const Miro::EOutOfBounds & e) {
cerr << "Miro out of bounds exception: " << e << endl;
rc = 1;
}
catch (const CORBA::Exception & e) {
cerr << "Uncaught CORBA exception: " << e << endl;
rc = 1;
}
return rc;
}
void
do_initializeSignals (bool allowUserRuntimeConnect_in,
ACE_Sig_Set& signals_inout)
{
RPG_TRACE(ACE_TEXT("::do_initializeSignals"));
int result = -1;
// init return value(s)
result = signals_inout.empty_set ();
if (result == -1)
{
ACE_DEBUG ((LM_ERROR,
ACE_TEXT ("failed to ACE_Sig_Set::empty_set(): \"%m\", aborting\n")));
return;
} // end IF
// init list of handled signals...
// *PORTABILITY*: on Windows SIGHUP and SIGQUIT are not defined,
// so we handle SIGBREAK (21) and SIGABRT (22) instead...
#if !defined (ACE_WIN32) && !defined (ACE_WIN64)
// *NOTE*: don't handle SIGHUP !!!! --> program will hang !
//signals_inout.push_back(SIGHUP);
#endif
signals_inout.sig_add (SIGINT);
#if !defined (ACE_WIN32) && !defined (ACE_WIN64)
signals_inout.sig_add (SIGQUIT);
#endif
// signals_inout.sig_add(SIGILL);
// signals_inout.sig_add(SIGTRAP);
// signals_inout.sig_add(SIGBUS);
// signals_inout.sig_add(SIGFPE);
// signals_inout.sig_add(SIGKILL); // cannot catch this one...
if (allowUserRuntimeConnect_in)
#if !defined (ACE_WIN32) && !defined (ACE_WIN64)
signals_inout.sig_add (SIGUSR1);
#else
signals_inout.sig_add (SIGBREAK);
#endif
// signals_inout.sig_add(SIGSEGV);
if (allowUserRuntimeConnect_in)
#if !defined (ACE_WIN32) && !defined (ACE_WIN64)
signals_inout.sig_add (SIGUSR2);
#else
signals_inout.sig_add (SIGABRT);
#endif
// signals_inout.sig_add(SIGPIPE);
// signals_inout.sig_add(SIGALRM);
signals_inout.sig_add (SIGTERM);
// signals_inout.sig_add(SIGSTKFLT);
// signals_inout.sig_add(SIGCHLD);
// signals_inout.sig_add(SIGCONT);
// signals_inout.sig_add(SIGSTOP); // cannot catch this one...
// signals_inout.sig_add(SIGTSTP);
// signals_inout.sig_add(SIGTTIN);
// signals_inout.sig_add(SIGTTOU);
// signals_inout.sig_add(SIGURG);
// signals_inout.sig_add(SIGXCPU);
// signals_inout.sig_add(SIGXFSZ);
// signals_inout.sig_add(SIGVTALRM);
// signals_inout.sig_add(SIGPROF);
// signals_inout.sig_add(SIGWINCH);
// signals_inout.sig_add(SIGIO);
// signals_inout.sig_add(SIGPWR);
// signals_inout.sig_add(SIGSYS);
// signals_inout.sig_add(SIGRTMIN);
// signals_inout.sig_add(SIGRTMIN+1);
// ...
// signals_inout.sig_add(SIGRTMAX-1);
// signals_inout.sig_add(SIGRTMAX);
}