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

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Diff for /pegasus/src/Pegasus/Common/Monitor.cpp between version 1.15 and 1.125

version 1.15, 2002/05/29 23:26:34

version 1.125, 2007/10/30 17:24:10

Line 1

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

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

// 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

Line 20

Line 29

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

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

// Modified By:

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

#include "Network.h"

#include <Pegasus/Common/Config.h>

#include <cstring>

#include "Monitor.h"

Line 33

Line 39

#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 "HostAddress.h"

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

#include <errno.h>

<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;

Line 62

Line 51

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

// MonitorRep

// Tickler

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

struct MonitorRep

Tickler::Tickler()

: _listenSocket(PEGASUS_INVALID_SOCKET),

_clientSocket(PEGASUS_INVALID_SOCKET),

_serverSocket(PEGASUS_INVALID_SOCKET)

{

fd_set rd_fd_set;

try

fd_set wr_fd_set;

{

fd_set ex_fd_set;

_initialize();

fd_set active_rd_fd_set;

}

fd_set active_wr_fd_set;

catch (...)

fd_set active_ex_fd_set;

{

};

_uninitialize();

throw;

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

}

// Monitor

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

Monitor::Monitor()

Tickler::~Tickler()

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

{

Socket::initializeInterface();

_uninitialize();

_rep = new MonitorRep;

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()

#if defined(PEGASUS_OS_TYPE_UNIX) || defined(PEGASUS_OS_VMS)

// Use an anonymous pipe for the tickle connection.

void Tickler::_initialize()

{

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

int fds[2];

"deregistering with module controller");

if(_module_handle != NULL)

if (pipe(fds) == -1)

{

_controller->deregister_module(PEGASUS_MODULENAME_MONITOR);

MessageLoaderParms parms(

_controller = 0;

"Common.Monitor.TICKLE_CREATE",

delete _module_handle;

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

getSocketError());

throw Exception(parms);

}

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

delete _rep;

_serverSocket = fds[0];

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

_clientSocket = fds[1];

Socket::uninitializeInterface();

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

"returning from monitor destructor");

}

#else

// Use an external loopback socket connection to allow the tickle socket to

// be included in the select() array on Windows.

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

void Tickler::_initialize()

// 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)

{

try

// Set up the addresses for the listen, client, and server sockets

// based on whether IPv6 is enabled.

Socket::initializeInterface();

# ifdef PEGASUS_ENABLE_IPV6

struct sockaddr_storage listenAddress;

struct sockaddr_storage clientAddress;

struct sockaddr_storage serverAddress;

# else

struct sockaddr_in listenAddress;

struct sockaddr_in clientAddress;

struct sockaddr_in serverAddress;

# endif

int addressFamily;

SocketLength addressLength;

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

# ifdef PEGASUS_ENABLE_IPV6

if (System::isIPv6StackActive())

{

_controller = &(ModuleController::register_module(PEGASUS_QUEUENAME_CONTROLSERVICE,

// Use the IPv6 loopback address for the listen sockets

PEGASUS_MODULENAME_MONITOR,

HostAddress::convertTextToBinary(

(void *)this,

HostAddress::AT_IPV6,

"::1",

&reinterpret_cast<struct sockaddr_in6*>(&listenAddress)->sin6_addr);

listenAddress.ss_family = AF_INET6;

&_module_handle));

reinterpret_cast<struct sockaddr_in6*>(&listenAddress)->sin6_port = 0;

addressFamily = AF_INET6;

addressLength = sizeof(struct sockaddr_in6);

}

catch(IncompatibleTypes &)

else

# endif

{

ModuleController* controlService =

// Use the IPv4 loopback address for the listen sockets

new ModuleController(PEGASUS_QUEUENAME_CONTROLSERVICE);

HostAddress::convertTextToBinary(

HostAddress::AT_IPV4,

"127.0.0.1",

&reinterpret_cast<struct sockaddr_in*>(

&listenAddress)->sin_addr.s_addr);

reinterpret_cast<struct sockaddr_in*>(&listenAddress)->sin_family =

AF_INET;

reinterpret_cast<struct sockaddr_in*>(&listenAddress)->sin_port = 0;

addressFamily = AF_INET;

addressLength = sizeof(struct sockaddr_in);

}

catch( AlreadyExists & )

// Use the same address for the client socket as the listen socket

clientAddress = listenAddress;

// Set up a listen socket to allow the tickle client and server to connect

// Create the listen socket

if ((_listenSocket = Socket::createSocket(addressFamily, SOCK_STREAM, 0)) ==

PEGASUS_INVALID_SOCKET)

{

break;

MessageLoaderParms parms(

"Common.Monitor.TICKLE_CREATE",

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

getSocketError());

throw Exception(parms);

}

// Bind the listen socket to the loopback address

if (::bind(

_listenSocket,

reinterpret_cast<struct sockaddr*>(&listenAddress),

addressLength) < 0)

{

MessageLoaderParms parms(

"Common.Monitor.TICKLE_BIND",

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

getSocketError());

throw Exception(parms);

}

#ifdef PEGASUS_OS_TYPE_WINDOWS

// Listen for a connection from the tickle client

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

{

MessageLoaderParms parms(

"Common.Monitor.TICKLE_LISTEN",

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

getSocketError());

throw Exception(parms);

}

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

// Verify we have the correct listen socket

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

SocketLength tmpAddressLength = addressLength;

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

int sock = ::getsockname(

_listenSocket,

reinterpret_cast<struct sockaddr*>(&listenAddress),

&tmpAddressLength);

if (sock < 0)

{

MessageLoaderParms parms(

"Common.Monitor.TICKLE_SOCKNAME",

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

getSocketError());

throw Exception(parms);

}

if (_entries.size() == 0)

Sleep(milliseconds);

// Set up the client side of the tickle connection.

#endif

// Create the client socket

if ((_clientSocket = Socket::createSocket(addressFamily, 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);

}

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

// Bind the client socket to the loopback address

// there were no undispatched events from last time.

if (::bind(

_clientSocket,

reinterpret_cast<struct sockaddr*>(&clientAddress),

addressLength) < 0)

{

MessageLoaderParms parms(

"Common.Monitor.TICKLE_CLIENT_BIND",

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

"socket.",

getSocketError());

throw Exception(parms);

}

int count = 0;

// Connect the client socket to the listen socket address

if (::connect(

_clientSocket,

reinterpret_cast<struct sockaddr*>(&listenAddress),

addressLength) < 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 server side of the tickle connection.

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

tmpAddressLength = addressLength;

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;

// Accept the client socket connection.

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

_serverSocket = ::accept(

struct timeval tv = { SECONDS, MICROSECONDS };

_listenSocket,

reinterpret_cast<struct sockaddr*>(&serverAddress),

&tmpAddressLength);

count = select(

if (_serverSocket == PEGASUS_SOCKET_ERROR)

FD_SETSIZE,

&_rep->active_rd_fd_set,

&_rep->active_wr_fd_set,

&_rep->active_ex_fd_set,

&tv);

if (count == 0)

{

return false;

MessageLoaderParms parms(

"Common.Monitor.TICKLE_ACCEPT",

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

"connection.",

getSocketError());

throw Exception(parms);

}

#ifdef PEGASUS_OS_TYPE_WINDOWS

else if (count == SOCKET_ERROR)

// Close the listen socket and make the other sockets non-blocking

#else

else if (count == -1)

#endif

Socket::close(_listenSocket);

{

_listenSocket = PEGASUS_INVALID_SOCKET;

return false;

Socket::disableBlocking(_serverSocket);

Socket::disableBlocking(_clientSocket);

}

Boolean handled_events = false;

#endif

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

void Tickler::_uninitialize()

{

Sint32 socket = _entries[i].socket;

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

Uint32 events = 0;

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

try

{

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

if (_serverSocket != PEGASUS_INVALID_SOCKET)

{

Socket::close(_serverSocket);

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

_serverSocket = PEGASUS_INVALID_SOCKET;

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

}

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

if (_clientSocket != PEGASUS_INVALID_SOCKET)

{

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

Socket::close(_clientSocket);

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

_clientSocket = PEGASUS_INVALID_SOCKET;

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();

}

if (_listenSocket != PEGASUS_INVALID_SOCKET)

{

Socket::close(_listenSocket);

_listenSocket = PEGASUS_INVALID_SOCKET;

}

catch (...)

{

PEG_TRACE_CSTRING(TRC_HTTP, Tracer::LEVEL4,

"Failed to close tickle sockets");

}

Socket::uninitializeInterface();

}

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

events |= SocketMessage::READ;

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

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

events |= SocketMessage::WRITE;

// Monitor

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

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

#define MAX_NUMBER_OF_MONITOR_ENTRIES 32

events |= SocketMessage::EXCEPTION;

Monitor::Monitor()

: _stopConnections(0),

_stopConnectionsSem(0),

_solicitSocketCount(0)

{

int numberOfMonitorEntriesToAllocate = MAX_NUMBER_OF_MONITOR_ENTRIES;

_entries.reserveCapacity(numberOfMonitorEntriesToAllocate);

// Create a MonitorEntry for the Tickler and set its state to IDLE so the

// Monitor will watch for its events.

_MonitorEntry entry(_tickler.getServerSocket(), 1, INTERNAL);

entry._status = _MonitorEntry::IDLE;

_entries.append(entry);

if (events)

// Start the count at 1 because _entries[0] is the Tickler

{

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

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

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

if (events & SocketMessage::WRITE)

{

FD_CLR(socket, &_rep->active_wr_fd_set);

_MonitorEntry entry(0, 0, 0);

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

_entries.append(entry);

"Monitor::run FD_CLR WRITE");

}

if (events & SocketMessage::EXCEPTION)

{

FD_CLR(socket, &_rep->active_ex_fd_set);

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

"Monitor::run FD_CLR EXECEPTION");

}

if (events & SocketMessage::READ)

Monitor::~Monitor()

{

FD_CLR(socket, &_rep->active_rd_fd_set);

PEG_TRACE_CSTRING(TRC_HTTP, Tracer::LEVEL4,

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

"returning from monitor destructor");

"Monitor::run FD_CLR READ");

}

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

if( ! queue )

void Monitor::tickle()

{

unsolicitSocketMessages(socket);

AutoMutex autoMutex(_tickleMutex);

break;

Socket::write(_tickler.getClientSocket(), "\0\0", 2);

}

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

void Monitor::setState(

Uint32 index,

_MonitorEntry::entry_status status)

{

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

AutoMutex autoEntryMutex(_entry_mut);

// Set the state to requested state

_entries[index]._status = status;

}

void Monitor::run(Uint32 milliseconds)

{

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

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

fd_set fdread;

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

FD_ZERO(&fdread);

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

else

AutoMutex autoEntryMutex(_entry_mut);

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

}

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[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

{

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

// set status to DYING

queue->enqueue(message);

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

}

count--;

pegasus_yield();

}

handled_events = true;

}

return(handled_events);

_stopConnections = 0;

_stopConnectionsSem.signal();

}

Boolean Monitor::solicitSocketMessages(

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

Sint32 socket,

{

Uint32 events,

const _MonitorEntry &entry = entries[indx];

Uint32 queueId,

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

int type)

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

{

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

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

PEGASUS_ASSERT(q != 0);

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

if (h._connectionClosePending == false)

continue;

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

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

Uint32 pos = _findEntry(socket);

// 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)

if (pos != PEGASUS_NOT_FOUND)

if (h._responsePending == true)

{

PEG_METHOD_EXIT();

PEG_TRACE((TRC_HTTP, Tracer::LEVEL4,

return false;

"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();

// Set the events:

// 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.

if (events & SocketMessage::READ)

_entry_mut.unlock();

FD_SET(socket, &_rep->rd_fd_set);

o.enqueue(message);

_entry_mut.lock();

if (events & SocketMessage::WRITE)

// After enqueue a message and the autoEntryMutex has been

FD_SET(socket, &_rep->wr_fd_set);

// 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 & SocketMessage::EXCEPTION)

Uint32 _idleEntries = 0;

FD_SET(socket, &_rep->ex_fd_set);

// Add the entry to the list:

_MonitorEntry entry(socket, queueId, type);

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

_entries.append(entry);

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;

// Success!

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

{

_idleEntries++;

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

}

PEG_METHOD_EXIT();

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

descriptors starting at 0.

maxSocketCurrentPass++;

_entry_mut.unlock();

// 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();

// 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

{

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

{

PEG_TRACE((TRC_HTTP, Tracer::LEVEL4,

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

"Monitor::CONNECTION",

indx));

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));

try

{

dst->run(1);

}

catch (...)

{

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));

// 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)

{

// set ourself to BUSY,

// 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);

Boolean Monitor::unsolicitSocketMessages(Sint32 socket)

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

}

else

{

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

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();

// Look for the given entry and remove it:

// 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);

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

}

catch (...)

{

}

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

void Monitor::stopListeningForConnections(Boolean wait)

{

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

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

// set boolean then tickle the server to recognize _stopConnections

_stopConnections = 1;

tickle();

if (wait)

{

Sint32 socket = _entries[i].socket;

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

FD_CLR(socket, &_rep->rd_fd_set);

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

FD_CLR(socket, &_rep->wr_fd_set);

// is still accepting connections on them.

FD_CLR(socket, &_rep->ex_fd_set);

_stopConnectionsSem.wait();

_entries.remove(i);

}

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

PEG_METHOD_EXIT();

return true;

}

int Monitor::solicitSocketMessages(

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);

}

PEG_METHOD_EXIT();

return false;

}

Uint32 Monitor::_findEntry(Sint32 socket)

int index;

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

{

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

try

{

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

{

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

_entries[index].socket = socket;

return i;

_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 -1;

}

return PEG_NOT_FOUND;

void Monitor::unsolicitSocketMessages(SocketHandle socket)

{

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

AutoMutex autoMut(_entry_mut);

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[index].socket == socket)

{

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

_entries[index].socket = PEGASUS_INVALID_SOCKET;

_solicitSocketCount--;

break;

}

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();

}

PEGASUS_THREAD_RETURN PEGASUS_THREAD_CDECL Monitor::_dispatch(void *parm)

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

ThreadReturnType PEGASUS_THREAD_CDECL Monitor::_dispatch(void* parm)

{

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

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

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

{

dst->refcount--;

dst->run(1);

return 0;

}

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

catch (...)

{

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

PEG_TRACE_CSTRING(TRC_HTTP, Tracer::LEVEL4,

pegasus_sleep(1);

"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);

// 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.

if (dst->_connectionClosePending)

{

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

_MonitorEntry::DYING;

}

else

{

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

_MonitorEntry::IDLE;

}

dst->refcount--;

return 0;

}

PEGASUS_NAMESPACE_END

Legend:

Removed from v.1.15
changed lines
	Added in v.1.125

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