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

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Diff for /pegasus/src/Pegasus/Common/Monitor.cpp between version 1.17 and 1.120

version 1.17, 2002/06/01 00:56:36

version 1.120, 2007/06/05 09:36:36

Line 1

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

//%2006////////////////////////////////////////////////////////////////////////

// The Open Group, Tivoli Systems

// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.

// IBM Corp.; EMC Corporation, The Open Group.

// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.

// EMC Corporation; VERITAS Software Corporation; The Open Group.

// EMC Corporation; Symantec Corporation; The Open Group.

// 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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//==============================================================================

// Author: Mike Brasher (mbrasher@bmc.com)

// Modified By:

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

#include "Network.h"

#include <Pegasus/Common/Config.h>

#include <cstring>

#include "Monitor.h"

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#include "Socket.h"

#include <Pegasus/Common/Tracer.h>

#include <Pegasus/Common/HTTPConnection.h>

#include <Pegasus/Common/MessageQueueService.h>

#ifdef PEGASUS_OS_TYPE_WINDOWS

#include <Pegasus/Common/Exception.h>

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

#include "ArrayIterator.h"

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

#include <errno.h>

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 \

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."

# endif

# define FD_SETSIZE 1024

# include <windows.h>

#else

# include <sys/types.h>

# include <sys/socket.h>

# include <sys/time.h>

# include <netinet/in.h>

# include <netdb.h>

# include <arpa/inet.h>

# include <unistd.h>

#endif

PEGASUS_USING_STD;

PEGASUS_NAMESPACE_BEGIN

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

static AtomicInt _connections(0);

// MonitorRep

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

struct MonitorRep

{

fd_set rd_fd_set;

fd_set wr_fd_set;

fd_set ex_fd_set;

fd_set active_rd_fd_set;

fd_set active_wr_fd_set;

fd_set active_ex_fd_set;

};

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

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

#define MAX_NUMBER_OF_MONITOR_ENTRIES 32

Monitor::Monitor()

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

: _stopConnections(0),

_stopConnectionsSem(0),

_solicitSocketCount(0),

_tickle_client_socket(-1),

_tickle_server_socket(-1),

_tickle_peer_socket(-1)

{

int numberOfMonitorEntriesToAllocate = MAX_NUMBER_OF_MONITOR_ENTRIES;

Socket::initializeInterface();

_rep = new MonitorRep;

_entries.reserveCapacity(numberOfMonitorEntriesToAllocate);

FD_ZERO(&_rep->rd_fd_set);

FD_ZERO(&_rep->wr_fd_set);

FD_ZERO(&_rep->ex_fd_set);

FD_ZERO(&_rep->active_rd_fd_set);

FD_ZERO(&_rep->active_wr_fd_set);

FD_ZERO(&_rep->active_ex_fd_set);

}

Monitor::~Monitor()

// setup the tickler

{

initializeTickler();

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

"deregistering with module controller");

if(_module_handle != NULL)

// Start the count at 1 because initilizeTickler()

// has added an entry in the first position of the

// _entries array

for (int i = 1; i < numberOfMonitorEntriesToAllocate; i++)

{

_controller->deregister_module(PEGASUS_MODULENAME_MONITOR);

_MonitorEntry entry(0, 0, 0);

_controller = 0;

_entries.append(entry);

delete _module_handle;

}

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

delete _rep;

Monitor::~Monitor()

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

{

uninitializeTickler();

Socket::uninitializeInterface();

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

PEG_TRACE_CSTRING(TRC_HTTP, Tracer::LEVEL4,

"returning from monitor destructor");

}

void Monitor::uninitializeTickler()

//<<< 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

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

while( _module_handle == NULL)

{

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

try

{

_controller = &(ModuleController::register_module(PEGASUS_QUEUENAME_CONTROLSERVICE,

if (_tickle_peer_socket >= 0)

PEGASUS_MODULENAME_MONITOR,

{

(void *)this,

Socket::close(_tickle_peer_socket);

&_module_handle));

}

catch(IncompatibleTypes &)

if (_tickle_client_socket >= 0)

{

ModuleController* controlService =

Socket::close(_tickle_client_socket);

new ModuleController(PEGASUS_QUEUENAME_CONTROLSERVICE);

}

catch( AlreadyExists & )

if (_tickle_server_socket >= 0)

{

break;

Socket::close(_tickle_server_socket);

}

catch (...)

{

PEG_TRACE_CSTRING(TRC_HTTP, Tracer::LEVEL4,

"Failed to close tickle sockets");

}

#ifdef PEGASUS_OS_TYPE_WINDOWS

}

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

void Monitor::initializeTickler()

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

{

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

NOTE: On any errors trying to

setup out tickle connection,

throw an exception/end the server

if (_entries.size() == 0)

/* setup the tickle server/listener */

Sleep(milliseconds);

// try until the tcpip is restarted

{

// get a socket for the server side

if ((_tickle_server_socket =

Socket::createSocket(PF_INET, SOCK_STREAM, 0)) ==

PEGASUS_INVALID_SOCKET)

{

MessageLoaderParms parms(

"Common.Monitor.TICKLE_CREATE",

"Received error number $0 while creating the internal socket.",

getSocketError());

throw Exception(parms);

}

// initialize the address

memset(&_tickle_server_addr, 0, sizeof(_tickle_server_addr));

_tickle_server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");

_tickle_server_addr.sin_family = PF_INET;

_tickle_server_addr.sin_port = 0;

SocketLength _addr_size = sizeof(_tickle_server_addr);

// bind server side to socket

if ((::bind(_tickle_server_socket,

reinterpret_cast<struct sockaddr*>(&_tickle_server_addr),

sizeof(_tickle_server_addr))) < 0)

{

#ifdef PEGASUS_OS_ZOS

MessageLoaderParms parms(

"Common.Monitor.TICKLE_BIND_LONG",

"Received error:$0 while binding the internal socket.",

strerror(errno));

#else

MessageLoaderParms parms(

"Common.Monitor.TICKLE_BIND",

"Received error number $0 while binding the internal socket.",

getSocketError());

#endif

throw Exception(parms);

}

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

// tell the kernel we are a server

// there were no undispatched events from last time.

if ((::listen(_tickle_server_socket, 3)) < 0)

{

MessageLoaderParms parms(

"Common.Monitor.TICKLE_LISTEN",

"Received error number $0 while listening to the internal "

"socket.",

getSocketError());

throw Exception(parms);

}

// make sure we have the correct socket for our server

int sock = ::getsockname(

_tickle_server_socket,

reinterpret_cast<struct sockaddr*>(&_tickle_server_addr),

&_addr_size);

if (sock < 0)

{

MessageLoaderParms parms(

"Common.Monitor.TICKLE_SOCKNAME",

"Received error number $0 while getting the internal socket "

"name.",

getSocketError());

throw Exception(parms);

}

/* set up the tickle client/connector */

// get a socket for our tickle client

if ((_tickle_client_socket =

Socket::createSocket(PF_INET, SOCK_STREAM, 0)) ==

PEGASUS_INVALID_SOCKET)

{

MessageLoaderParms parms(

"Common.Monitor.TICKLE_CLIENT_CREATE",

"Received error number $0 while creating the internal client "

"socket.",

getSocketError());

throw Exception(parms);

}

// setup the address of the client

memset(&_tickle_client_addr, 0, sizeof(_tickle_client_addr));

_tickle_client_addr.sin_addr.s_addr = inet_addr("127.0.0.1");

_tickle_client_addr.sin_family = PF_INET;

_tickle_client_addr.sin_port = 0;

// bind socket to client side

if ((::bind(_tickle_client_socket,

reinterpret_cast<struct sockaddr*>(&_tickle_client_addr),

sizeof(_tickle_client_addr))) < 0)

{

MessageLoaderParms parms(

"Common.Monitor.TICKLE_CLIENT_BIND",

"Received error number $0 while binding the internal client "

"socket.",

getSocketError());

throw Exception(parms);

}

// connect to server side

if ((::connect(_tickle_client_socket,

reinterpret_cast<struct sockaddr*>(&_tickle_server_addr),

sizeof(_tickle_server_addr))) < 0)

{

MessageLoaderParms parms(

"Common.Monitor.TICKLE_CLIENT_CONNECT",

"Received error number $0 while connecting the internal "

"client socket.",

getSocketError());

throw Exception(parms);

}

/* set up the slave connection */

memset(&_tickle_peer_addr, 0, sizeof(_tickle_peer_addr));

SocketLength peer_size = sizeof(_tickle_peer_addr);

Threads::sleep(1);

// this call may fail, we will try a max of 20 times to establish

// this peer connection

if ((_tickle_peer_socket = ::accept(_tickle_server_socket,

reinterpret_cast<struct sockaddr*>(&_tickle_peer_addr),

&peer_size)) < 0)

{

if (_tickle_peer_socket == PEGASUS_SOCKET_ERROR &&

getSocketError() == PEGASUS_NETWORK_TRYAGAIN)

{

int retries = 0;

{

Threads::sleep(1);

_tickle_peer_socket = ::accept(

_tickle_server_socket,

reinterpret_cast<struct sockaddr*>(&_tickle_peer_addr),

&peer_size);

retries++;

} while (_tickle_peer_socket == PEGASUS_SOCKET_ERROR &&

getSocketError() == PEGASUS_NETWORK_TRYAGAIN &&

retries < 20);

}

// TCP/IP is down, destroy sockets and retry again.

if (_tickle_peer_socket == PEGASUS_SOCKET_ERROR &&

getSocketError() == PEGASUS_NETWORK_TCPIP_STOPPED)

{

// destroy everything

uninitializeTickler();

// retry again.

continue;

}

if (_tickle_peer_socket == PEGASUS_SOCKET_ERROR)

{

MessageLoaderParms parms(

"Common.Monitor.TICKLE_ACCEPT",

"Received error number $0 while accepting the internal "

"socket connection.",

getSocketError());

throw Exception(parms);

}

else

{

// socket is ok

break;

}

} while (1); // try until TCP/IP is restarted

int count = 0;

Socket::disableBlocking(_tickle_peer_socket);

Socket::disableBlocking(_tickle_client_socket);

// add the tickler to the list of entries to be monitored and set to

// IDLE because Monitor only

// checks entries with IDLE state for events

_MonitorEntry entry(_tickle_peer_socket, 1, INTERNAL);

entry._status = _MonitorEntry::IDLE;

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

// is the tickler initalized as first socket on startup ?

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

if (_entries.size()==0)

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

const Uint32 SECONDS = milliseconds / 1000;

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

struct timeval tv = { SECONDS, MICROSECONDS };

count = select(

FD_SETSIZE,

&_rep->active_rd_fd_set,

// &_rep->active_wr_fd_set,

NULL,

&_rep->active_ex_fd_set,

&tv);

if (count == 0)

{

return false;

// if yes, append a new entry

_entries.append(entry);

}

else

{

// if not, overwrite the tickler entry with new socket

_entries[0]=entry;

}

#ifdef PEGASUS_OS_TYPE_WINDOWS

void Monitor::tickle()

else if (count == SOCKET_ERROR)

{

#else

static char _buffer[] =

else if (count == -1)

{

#endif

'0','0'

};

AutoMutex autoMutex(_tickle_mutex);

Socket::write(_tickle_client_socket,&_buffer, 2);

}

void Monitor::setState( Uint32 index, _MonitorEntry::entry_status status )

{

return false;

// Set the state to requested state

_entries[index]._status = status;

}

Boolean handled_events = false;

void Monitor::run(Uint32 milliseconds)

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

{

Sint32 socket = _entries[i].socket;

Uint32 events = 0;

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

struct timeval tv = {milliseconds/1000, milliseconds%1000*1000};

fd_set fdread;

FD_ZERO(&fdread);

AutoMutex autoEntryMutex(_entry_mut);

ArrayIterator<_MonitorEntry> entries(_entries);

// Check the stopConnections flag. If set, clear the Acceptor monitor

// entries

if (_stopConnections.get() == 1)

{

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

{

if (entries[indx]._type == Monitor::ACCEPTOR)

{

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

if ( entries[indx]._status.get() != _MonitorEntry::EMPTY)

{

if ( entries[indx]._status.get() == _MonitorEntry::IDLE ||

entries[indx]._status.get() == _MonitorEntry::DYING )

{

// remove the entry

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

}

else

{

// set status to DYING

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

}

_stopConnections = 0;

_stopConnectionsSem.signal();

}

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

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

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

{

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

const _MonitorEntry &entry = entries[indx];

if ((entry._status.get() == _MonitorEntry::DYING) &&

(entry._type == Monitor::CONNECTION))

{

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

MessageQueue *q = MessageQueue::lookup(entry.queueId);

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

PEGASUS_ASSERT(q != 0);

HTTPConnection &h = *static_cast<HTTPConnection *>(q);

if (h._connectionClosePending == false)

continue;

// NOTE: do not attempt to delete while there are pending responses

// coming thru. The last response to come thru after a

// _connectionClosePending will reset _responsePending to false

// and then cause the monitor to rerun this code and clean up.

// (see HTTPConnection.cpp)

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

if (h._responsePending == true)

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

{

PEG_TRACE((TRC_HTTP, Tracer::LEVEL4,

"Monitor::run - Ignoring connection delete request "

"because responses are still pending. "

"connection=0x%p, socket=%d\n",

(void *)&h, h.getSocket()));

continue;

}

h._connectionClosePending = false;

MessageQueue &o = h.get_owner();

Message* message= new CloseConnectionMessage(entry.socket);

message->dest = o.getQueueId();

// HTTPAcceptor is responsible for closing the connection.

// The lock is released to allow HTTPAcceptor to call

// unsolicitSocketMessages to free the entry.

// Once HTTPAcceptor completes processing of the close

// connection, the lock is re-requested and processing of

// the for loop continues. This is safe with the current

// implementation of the entries object. Note that the

// loop condition accesses the entries.size() on each

// iteration, so that a change in size while the mutex is

// unlocked will not result in an ArrayIndexOutOfBounds

// exception.

_entry_mut.unlock();

o.enqueue(message);

i--;

_entry_mut.lock();

n = _entries.size();

// After enqueue a message and the autoEntryMutex has been

// released and locked again, the array of _entries can be

// changed. The ArrayIterator has be reset with the original

// _entries.

entries.reset(_entries);

}

Uint32 _idleEntries = 0;

We will keep track of the maximum socket number and pass this value

to the kernel as a parameter to SELECT. This loop seems like a good

place to calculate the max file descriptor (maximum socket number)

because we have to traverse the entire array.

SocketHandle maxSocketCurrentPass = 0;

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

{

if (maxSocketCurrentPass < entries[indx].socket)

maxSocketCurrentPass = entries[indx].socket;

if (entries[indx]._status.get() == _MonitorEntry::IDLE)

{

_idleEntries++;

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

}

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

events |= SocketMessage::READ;

Add 1 then assign maxSocket accordingly. We add 1 to account for

descriptors starting at 0.

maxSocketCurrentPass++;

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

_entry_mut.unlock();

// events |= SocketMessage::WRITE;

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

events |= SocketMessage::EXCEPTION;

// The first argument to select() is ignored on Windows and it is not

// a socket value. The original code assumed that the number of sockets

// and a socket value have the same type. On Windows they do not.

#ifdef PEGASUS_OS_TYPE_WINDOWS

int events = select(0, &fdread, NULL, NULL, &tv);

#else

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

#endif

_entry_mut.lock();

if (events)

// After enqueue a message and the autoEntryMutex has been released and

// locked again, the array of _entries can be changed. The ArrayIterator

// has be reset with the original _entries

entries.reset(_entries);

if (events == PEGASUS_SOCKET_ERROR)

{

PEG_TRACE((TRC_HTTP, Tracer::LEVEL4,

"Monitor::run - errorno = %d has occurred on select.", errno));

// The EBADF error indicates that one or more or the file

// descriptions was not valid. This could indicate that

// the entries structure has been corrupted or that

// we have a synchronization error.

PEGASUS_ASSERT(errno != EBADF);

}

else if (events)

{

PEG_TRACE((TRC_HTTP, Tracer::LEVEL4,

"Monitor::run select event received events = %d, monitoring %d "

"idle entries",

events, _idleEntries));

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

{

// The Monitor should only look at entries in the table that are

// IDLE (i.e., owned by the Monitor).

if ((entries[indx]._status.get() == _MonitorEntry::IDLE) &&

(FD_ISSET(entries[indx].socket, &fdread)))

{

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

PEG_TRACE((TRC_HTTP, Tracer::LEVEL4,

"Monitor::run indx = %d, queueId = %d, q = %p",

indx, entries[indx].queueId, q));

PEGASUS_ASSERT(q !=0);

try

{

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

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

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

{

// if (events & SocketMessage::WRITE)

PEG_TRACE((TRC_HTTP, Tracer::LEVEL4,

// {

"entries[indx].type for indx = %d is "

// FD_CLR(socket, &_rep->active_wr_fd_set);

"Monitor::CONNECTION",

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

indx));

// "Monitor::run FD_CLR WRITE");

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

// }

// Do not update the entry just yet. The entry gets

// updated once the request has been read.

//entries[indx]._status = _MonitorEntry::BUSY;

// If allocate_and_awaken failure, retry on next

// iteration

/* Removed for PEP 183.

if (!MessageQueueService::get_thread_pool()->

allocate_and_awaken((void *)q, _dispatch))

{

PEG_TRACE_CSTRING(TRC_DISCARDED_DATA,

Tracer::LEVEL2,

"Monitor::run: Insufficient resources to "

"process request.");

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

return true;

}

// Added for PEP 183

HTTPConnection *dst =

reinterpret_cast<HTTPConnection *>(q);

PEG_TRACE((TRC_HTTP, Tracer::LEVEL4,

"Monitor::_dispatch: entering run() for "

"indx = %d, queueId = %d, q = %p",

dst->_entry_index,

dst->_monitor->_entries[dst->_entry_index].queueId,

dst));

if (events & SocketMessage::READ)

try

{

FD_CLR(socket, &_rep->active_rd_fd_set);

dst->run(1);

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

"Monitor::run FD_CLR READ");

}

else if (events & SocketMessage::EXCEPTION)

catch (...)

{

FD_CLR(socket, &_rep->active_ex_fd_set);

PEG_TRACE_CSTRING(TRC_HTTP, Tracer::LEVEL4,

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

"Monitor::_dispatch: exception received");

"Monitor::run FD_CLR EXECEPTION");

}

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

PEG_TRACE((TRC_HTTP, Tracer::LEVEL4,

if( ! queue )

"Monitor::_dispatch: exited run() for index %d",

dst->_entry_index));

// It is possible the entry status may not be set to

// busy. The following will fail in that case.

// PEGASUS_ASSERT(dst->_monitor->_entries[

// dst->_entry_index]._status.get() ==

// _MonitorEntry::BUSY);

// Once the HTTPConnection thread has set the status

// value to either Monitor::DYING or Monitor::IDLE,

// it has returned control of the connection to the

// Monitor. It is no longer permissible to access

// the connection or the entry in the _entries table.

// The following is not relevant as the worker thread

// or the reader thread will update the status of the

// entry.

//if (dst->_connectionClosePending)

//{

// dst->_monitor->_entries[dst->_entry_index]._status =

// _MonitorEntry::DYING;

//}

//else

//{

// dst->_monitor->_entries[dst->_entry_index]._status =

// _MonitorEntry::IDLE;

//}

// end Added for PEP 183

}

else if (entries[indx]._type == Monitor::INTERNAL)

{

unsolicitSocketMessages(socket);

// set ourself to BUSY,

break;

// read the data

// and set ourself back to IDLE

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

static char buffer[2];

Sint32 amt =

Socket::read(entries[indx].socket,&buffer, 2);

if (amt == PEGASUS_SOCKET_ERROR &&

getSocketError() == PEGASUS_NETWORK_TCPIP_STOPPED)

{

PEG_TRACE_CSTRING(TRC_HTTP, Tracer::LEVEL4,

"Monitor::run: Tickler socket got an IO error. "

"Going to re-create Socket and wait for "

"TCP/IP restart.");

uninitializeTickler();

initializeTickler();

}

else

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

{

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

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

}

else

{

PEG_TRACE((TRC_HTTP, Tracer::LEVEL4,

"Non-connection entry, indx = %d, has been "

"received.",

indx));

int events = 0;

events |= SocketMessage::READ;

Message* msg = new SocketMessage(

entries[indx].socket, events);

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

_entry_mut.unlock();

q->enqueue(msg);

_entry_mut.lock();

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

// After enqueue a message and the autoEntryMutex has

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

// been released and locked again, the array of

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

// entries can be changed. The ArrayIterator has be

else

// reset with the original _entries

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

entries.reset(_entries);

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

}

else

catch (...)

{

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

queue->enqueue(message);

}

count--;

pegasus_yield();

}

handled_events = true;

}

return(handled_events);

}

Boolean Monitor::solicitSocketMessages(

void Monitor::stopListeningForConnections(Boolean wait)

Sint32 socket,

Uint32 events,

Uint32 queueId,

int type)

{

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

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

// set boolean then tickle the server to recognize _stopConnections

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

_stopConnections = 1;

Uint32 pos = _findEntry(socket);

tickle();

if (pos != PEGASUS_NOT_FOUND)

if (wait)

{

PEG_METHOD_EXIT();

// Wait for the monitor to notice _stopConnections. Otherwise the

return false;

// caller of this function may unbind the ports while the monitor

// is still accepting connections on them.

_stopConnectionsSem.wait();

}

// Set the events:

PEG_METHOD_EXIT();

}

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:

int Monitor::solicitSocketMessages(

_MonitorEntry entry(socket, queueId, type);

SocketHandle socket,

Uint32 events,

Uint32 queueId,

int type)

{

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

AutoMutex autoMut(_entry_mut);

// Check to see if we need to dynamically grow the _entries array

// We always want the _entries array to 2 bigger than the

// current connections requested

_solicitSocketCount++; // bump the count

int size = (int)_entries.size();

if ((int)_solicitSocketCount >= (size-1))

{

for (int i = 0; i < ((int)_solicitSocketCount - (size-1)); i++)

{

_MonitorEntry entry(0, 0, 0);

_entries.append(entry);

}

// Success!

int index;

for (index = 1; index < (int)_entries.size(); index++)

{

try

{

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

{

_entries[index].socket = socket;

_entries[index].queueId = queueId;

_entries[index]._type = type;

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

return index;

}

catch (...)

{

}

// decrease the count, if we are here we didn't do anything meaningful

_solicitSocketCount--;

PEG_METHOD_EXIT();

return true;

return -1;

}

Boolean Monitor::unsolicitSocketMessages(Sint32 socket)

void Monitor::unsolicitSocketMessages(SocketHandle socket)

{

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

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

AutoMutex autoMut(_entry_mut);

// Look for the given entry and remove it:

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

Start at index = 1 because _entries[0] is the tickle entry which

never needs to be EMPTY;

unsigned int index;

for (index = 1; index < _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);

_entries[index].socket = PEGASUS_INVALID_SOCKET;

FD_CLR(socket, &_rep->wr_fd_set);

_solicitSocketCount--;

FD_CLR(socket, &_rep->ex_fd_set);

break;

_entries.remove(i);

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

PEG_METHOD_EXIT();

return true;

}

Dynamic Contraction:

To remove excess entries we will start from the end of the _entries

array and remove all entries with EMPTY status until we find the

first NON EMPTY. This prevents the positions, of the NON EMPTY

entries, from being changed.

index = _entries.size() - 1;

while (_entries[index]._status.get() == _MonitorEntry::EMPTY)

{

if (_entries.size() > MAX_NUMBER_OF_MONITOR_ENTRIES)

_entries.remove(index);

index--;

}

PEG_METHOD_EXIT();

return false;

}

Uint32 Monitor::_findEntry(Sint32 socket)

// Note: this is no longer called with PEP 183.

ThreadReturnType PEGASUS_THREAD_CDECL Monitor::_dispatch(void* parm)

{

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

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

PEG_TRACE((TRC_HTTP, Tracer::LEVEL4,

"Monitor::_dispatch: entering run() for indx = %d, queueId = %d, "

"q = %p",

dst->_entry_index,

dst->_monitor->_entries[dst->_entry_index].queueId,

dst));

try

{

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

dst->run(1);

return i;

}

catch (...)

return PEG_NOT_FOUND;

{

PEG_TRACE_CSTRING(TRC_HTTP, Tracer::LEVEL4,

"Monitor::_dispatch: exception received");

}

PEG_TRACE((TRC_HTTP, Tracer::LEVEL4,

"Monitor::_dispatch: exited run() for index %d", dst->_entry_index));

PEGASUS_ASSERT(dst->_monitor->_entries[dst->_entry_index]._status.get() ==

_MonitorEntry::BUSY);

PEGASUS_THREAD_RETURN PEGASUS_THREAD_CDECL Monitor::_dispatch(void *parm)

// Once the HTTPConnection thread has set the status value to either

{

// Monitor::DYING or Monitor::IDLE, it has returned control of the

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

// connection to the Monitor. It is no longer permissible to access the

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

// connection or the entry in the _entries table.

if (dst->_connectionClosePending)

{

dst->refcount--;

dst->_monitor->_entries[dst->_entry_index]._status =

return 0;

_MonitorEntry::DYING;

}

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

else

{

if(false == dst->run(1))

dst->_monitor->_entries[dst->_entry_index]._status =

pegasus_sleep(1);

_MonitorEntry::IDLE;

}

dst->refcount--;

return 0;

}

PEGASUS_NAMESPACE_END

Legend:

Removed from v.1.17
changed lines
	Added in v.1.120

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