pegasus/src/Pegasus/Common/Monitor.cpp - diff

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Diff for /pegasus/src/Pegasus/Common/Monitor.cpp between version 1.12 and 1.32.2.2

version 1.12, 2002/05/23 20:11:56

version 1.32.2.2, 2002/10/29 21:13:17

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//%/////////////////////////////////////////////////////////////////////////////

// The Open Group, Tivoli Systems

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to

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//%/////////////////////////////////////////////////////////////////////////////

#include <Pegasus/Common/Config.h>

#include <cstring>

#include "Monitor.h"

#include "MessageQueue.h"

#include "Socket.h"

#include <Pegasus/Common/Tracer.h>

#include <Pegasus/Common/HTTPConnection.h>

#ifdef PEGASUS_OS_TYPE_WINDOWS

# if defined(FD_SETSIZE) && FD_SETSIZE != 1024

# error "FD_SETSIZE was not set to 1024 prior to the last inclusion \

of <winsock.h>. It may have been indirectly included (e.g., by including \

<windows.h>). Find the inclusion of that header which is visible to this \

<windows.h>). Finthe inclusion of that header which is visible to this \

compilation unit and #define FD_SETZIE to 1024 prior to that inclusion; \

otherwise, less than 64 clients (the default) will be able to connect to the \

CIMOM. PLEASE DO NOT SUPPRESS THIS WARNING; PLEASE FIX THE PROBLEM."

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PEGASUS_NAMESPACE_BEGIN

static AtomicInt _connections = 0;

static struct timeval create_time = {0, 1};

static struct timeval destroy_time = {15, 0};

static struct timeval deadlock_time = {0, 0};

////////////////////////////////////////////////////////////////////////////////

// MonitorRep

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////////////////////////////////////////////////////////////////////////////////

Monitor::Monitor()

: _module_handle(0), _controller(0), _async(false)

: _async(false)

{

Socket::initializeInterface();

_rep = new MonitorRep;

_rep = 0;

FD_ZERO(&_rep->rd_fd_set);

_entries.reserveCapacity(32);

FD_ZERO(&_rep->wr_fd_set);

int i = 0;

FD_ZERO(&_rep->ex_fd_set);

for( ; i < 32; i++ )

FD_ZERO(&_rep->active_rd_fd_set);

{

FD_ZERO(&_rep->active_wr_fd_set);

_MonitorEntry entry(0, 0, 0);

FD_ZERO(&_rep->active_ex_fd_set);

_entries.append(entry);

}

Monitor::Monitor(Boolean async)

: _async(async)

{

Socket::initializeInterface();

_rep = 0;

// _entries.reserveCapacity(32);

// int i = 0;

// for( ; i < 32; i++ )

// {

// _MonitorEntry entry(0, 0, 0);

// _entries.append(entry);

// }

if( _async == true )

{

_thread_pool = new ThreadPool(0,

"Monitor",

create_time,

destroy_time,

deadlock_time);

}

else

_thread_pool = 0;

}

Monitor::~Monitor()

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Tracer::trace(TRC_HTTP, Tracer::LEVEL4,

"deregistering with module controller");

if(_module_handle != NULL)

{

_controller->deregister_module(PEGASUS_MODULENAME_MONITOR);

_controller = 0;

delete _module_handle;

}

Tracer::trace(TRC_HTTP, Tracer::LEVEL4, "deleting rep");

delete _rep;

Tracer::trace(TRC_HTTP, Tracer::LEVEL4, "uninitializing interface");

Socket::uninitializeInterface();

Tracer::trace(TRC_HTTP, Tracer::LEVEL4,

"returning from monitor destructor");

if(_async == true)

delete _thread_pool;

}

int Monitor::kill_idle_threads()

//<<< Tue May 14 20:38:26 2002 mdd >>>

// register with module controller

// when it is time to enqueue the message,

// use an async_thread_exec call to

// isolate the entire if(events) { enqueue -> fd_clear } block

// let the thread pool grow and shrink according to load.

Boolean Monitor::run(Uint32 milliseconds)

{

// register the monitor as a module to gain access to the cimserver's thread pool

static struct timeval now, last;

// <<< Wed May 15 09:52:16 2002 mdd >>>

gettimeofday(&now, NULL);

while( _module_handle == NULL)

int dead_threads = 0;

if( now.tv_sec - last.tv_sec > 300 )

{

PEGASUS_STD(cout) << "Monitor Thread Pool currently has " <<

_thread_pool->running_count() +

_thread_pool->pool_count() << " Threads." << PEGASUS_STD(endl);

gettimeofday(&last, NULL);

try

{

_controller = &(ModuleController::register_module(PEGASUS_QUEUENAME_CONTROLSERVICE,

dead_threads = _thread_pool->kill_dead_threads();

PEGASUS_MODULENAME_MONITOR,

(void *)this,

&_module_handle));

}

catch(IncompatibleTypes &)

catch(IPCException& )

{

ModuleController* controlService =

new ModuleController(PEGASUS_QUEUENAME_CONTROLSERVICE);

}

catch( AlreadyExists & )

{

break;

}

return dead_threads;

}

#ifdef PEGASUS_OS_TYPE_WINDOWS

// Windows select() has a strange little bug. It returns immediately if

// there are no descriptors in the set even if the timeout is non-zero.

// To work around this, we call Sleep() for now:

if (_entries.size() == 0)

Sleep(milliseconds);

#endif

// Check for events on the selected file descriptors. Only do this if

// there were no undispatched events from last time.

int count = 0;

Boolean Monitor::run(Uint32 milliseconds)

if (count == 0)

{

memcpy(&_rep->active_rd_fd_set, &_rep->rd_fd_set, sizeof(fd_set));

memcpy(&_rep->active_wr_fd_set, &_rep->wr_fd_set, sizeof(fd_set));

memcpy(&_rep->active_ex_fd_set, &_rep->ex_fd_set, sizeof(fd_set));

const Uint32 SECONDS = milliseconds / 1000;

Boolean handled_events = false;

const Uint32 MICROSECONDS = (milliseconds % 1000) * 1000;

int i = 0;

struct timeval tv = { SECONDS, MICROSECONDS };

count = select(

struct timeval tv = {0,1};

FD_SETSIZE,

fd_set fdread;

&_rep->active_rd_fd_set,

FD_ZERO(&fdread);

&_rep->active_wr_fd_set,

&_rep->active_ex_fd_set,

&tv);

if (count == 0)

for( int indx = 0; indx < (int)_entries.size(); indx++)

{

pegasus_sleep(milliseconds);

if(_entries[indx]._status.value() == _MonitorEntry::IDLE)

{

return false;

FD_SET(_entries[indx].socket, &fdread);

}

int events = select(FD_SETSIZE, &fdread, NULL, NULL, &tv);

#ifdef PEGASUS_OS_TYPE_WINDOWS

else if (count == SOCKET_ERROR)

if(events && events != SOCKET_ERROR )

#else

else if (count == -1)

if(events && events != -1 )

#endif

{

count = 0;

for( int indx = 0; indx < (int)_entries.size(); indx++)

pegasus_sleep(milliseconds);

return false;

}

for (Uint32 i = 0, n = _entries.size(); i < n; i++)

{

Sint32 socket = _entries[i].socket;

if(FD_ISSET(_entries[indx].socket, &fdread))

Uint32 events = 0;

if(_entries[i].dying.value() > 0 )

{

if(_entries[i]._type == Monitor::CONNECTION)

MessageQueue *q = MessageQueue::lookup(_entries[indx].queueId);

if(q == 0)

{

PEGASUS_STD(cout) << "Monitor:: found an empty connection slot" << PEGASUS_STD(endl);

MessageQueue *q = MessageQueue::lookup(_entries[i].queueId);

try

if(q && static_cast<HTTPConnection *>(q)->is_dying() &&

(0 == static_cast<HTTPConnection *>(q)->refcount.value()))

{

static_cast<HTTPConnection *>(q)->lock_connection();

_entries[indx]._status = _MonitorEntry::EMPTY;

static_cast<HTTPConnection *>(q)->unlock_connection();

MessageQueue & o = static_cast<HTTPConnection *>(q)->get_owner();

Message* message= new CloseConnectionMessage(static_cast<HTTPConnection *>(q)->getSocket());

message->dest = o.getQueueId();

o.enqueue(message);

i--;

n = _entries.size();

continue;

}

catch(...)

{

}

return true;

}

try

if (FD_ISSET(socket, &_rep->active_rd_fd_set))

events |= SocketMessage::READ;

if (FD_ISSET(socket, &_rep->active_wr_fd_set))

events |= SocketMessage::WRITE;

if (FD_ISSET(socket, &_rep->active_ex_fd_set))

events |= SocketMessage::EXCEPTION;

if (events)

{

Tracer::trace(TRC_HTTP, Tracer::LEVEL4,

if(_entries[indx]._type == Monitor::CONNECTION)

"Monitor::run - Socket Event Detected events = %d", events);

if (events & SocketMessage::WRITE)

{

FD_CLR(socket, &_rep->active_wr_fd_set);

static_cast<HTTPConnection *>(q)->_entry_index = indx;

Tracer::trace(TRC_HTTP, Tracer::LEVEL4,

if(static_cast<HTTPConnection *>(q)->_dying.value() > 0 )

"Monitor::run FD_CLR WRITE");

}

if (events & SocketMessage::EXCEPTION)

{

FD_CLR(socket, &_rep->active_ex_fd_set);

_entries[indx]._status = _MonitorEntry::DYING;

Tracer::trace(TRC_HTTP, Tracer::LEVEL4,

MessageQueue & o = static_cast<HTTPConnection *>(q)->get_owner();

"Monitor::run FD_CLR EXECEPTION");

Message* message= new CloseConnectionMessage(_entries[indx].socket);

message->dest = o.getQueueId();

o.enqueue(message);

return true;

}

if (events & SocketMessage::READ)

_entries[indx]._status = _MonitorEntry::BUSY;

{

_thread_pool->allocate_and_awaken((void *)q, _dispatch);

FD_CLR(socket, &_rep->active_rd_fd_set);

Tracer::trace(TRC_HTTP, Tracer::LEVEL4,

"Monitor::run FD_CLR READ");

}

MessageQueue* queue = MessageQueue::lookup(_entries[i].queueId);

else

if( ! queue )

{

unsolicitSocketMessages(socket);

int events = 0;

break;

events |= SocketMessage::READ;

Message *msg = new SocketMessage(_entries[indx].socket, events);

_entries[indx]._status = _MonitorEntry::BUSY;

q->enqueue(msg);

_entries[indx]._status = _MonitorEntry::IDLE;

return true;

}

if(_entries[i]._type == Monitor::CONNECTION)

catch(...)

{

if( 0 == static_cast<HTTPConnection *>(queue)->refcount.value())

{

static_cast<HTTPConnection *>(queue)->refcount++;

if( false == static_cast<HTTPConnection *>(queue)->is_dying())

_controller->async_thread_exec(*_module_handle, _dispatch, (void *)queue);

else

static_cast<HTTPConnection *>(queue)->refcount--;

}

handled_events = true;

}

else

{

Message* message = new SocketMessage(socket, events);

queue->enqueue(message);

}

count--;

return true;

}

return(handled_events);

}

pegasus_sleep(milliseconds);

return false;

}

Boolean Monitor::solicitSocketMessages(

int Monitor::solicitSocketMessages(

Sint32 socket,

Uint32 events,

Uint32 queueId,

int type)

{

PEG_METHOD_ENTER(TRC_HTTP, "Monitor::solictSocketMessage");

// See whether a handler is already registered for this one:

int index = -1;

Uint32 pos = _findEntry(socket);

for(index = 0; index < (int)_entries.size(); index++)

{

try

{

if(_entries[index]._status.value() == _MonitorEntry::EMPTY)

{

if (pos != PEGASUS_NOT_FOUND)

_entries[index].socket = socket;

_entries[index].queueId = queueId;

_entries[index]._type = type;

_entries[index]._status = _MonitorEntry::IDLE;

return index;

}

catch(...)

{

PEG_METHOD_EXIT();

return false;

}

// Set the events:

if (events & SocketMessage::READ)

FD_SET(socket, &_rep->rd_fd_set);

if (events & SocketMessage::WRITE)

FD_SET(socket, &_rep->wr_fd_set);

if (events & SocketMessage::EXCEPTION)

FD_SET(socket, &_rep->ex_fd_set);

// Add the entry to the list:

_MonitorEntry entry(socket, queueId, type);

_entries.append(entry);

// Success!

PEG_METHOD_EXIT();

return true;

return index;

}

Boolean Monitor::unsolicitSocketMessages(Sint32 socket)

void Monitor::unsolicitSocketMessages(Sint32 socket)

{

PEG_METHOD_ENTER(TRC_HTTP, "Monitor::unsolicitSocketMessage");

PEG_METHOD_ENTER(TRC_HTTP, "Monitor::unsolicitSocketMessages");

// Look for the given entry and remove it:

for (Uint32 i = 0, n = _entries.size(); i < n; i++)

for(int index = 0; index < (int)_entries.size(); index++)

{

if (_entries[i].socket == socket)

if(_entries[index].socket == socket)

{

Sint32 socket = _entries[i].socket;

_entries[index]._status = _MonitorEntry::EMPTY;

FD_CLR(socket, &_rep->rd_fd_set);

FD_CLR(socket, &_rep->wr_fd_set);

FD_CLR(socket, &_rep->ex_fd_set);

_entries.remove(i);

// ATTN-RK-P3-20020521: Need "Socket::close(socket);" here?

PEG_METHOD_EXIT();

return true;

}

PEG_METHOD_EXIT();

return false;

}

Uint32 Monitor::_findEntry(Sint32 socket)

PEG_METHOD_EXIT();

{

if( _async == true )

for (Uint32 i = 0, n = _entries.size(); i < n; i++)

PEGASUS_STD(cout) << "Monitor:: running " << _thread_pool->running_count() <<

{

" idle " << _thread_pool->pool_count() << PEGASUS_STD(endl);

if (_entries[i].socket == socket)

return i;

}

return PEG_NOT_FOUND;

}

PEGASUS_THREAD_RETURN PEGASUS_THREAD_CDECL Monitor::_dispatch(void *parm)

{

HTTPConnection *dst = reinterpret_cast<HTTPConnection *>(parm);

if( true == dst->is_dying())

{

dst->refcount--;

return 0;

}

if( false == dst->is_dying())

{

dst->run(1);

}

if( dst->_monitor->_entries.size() > (Uint32)dst->_entry_index )

dst->refcount--;

dst->_monitor->_entries[dst->_entry_index]._status = _MonitorEntry::IDLE;

return 0;

}

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Removed from v.1.12
changed lines
	Added in v.1.32.2.2

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