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

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Diff for /pegasus/src/Pegasus/Common/Monitor.cpp between version 1.6 and 1.94

version 1.6, 2002/05/08 20:28:44

version 1.94, 2005/05/20 19:53:10

Line 1

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

//%2005////////////////////////////////////////////////////////////////////////

// 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.

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

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

Line 22

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

// Modified By:

// Modified By: Mike Day (monitor_2) mdday@us.ibm.com

// Amit K Arora (Bug#1153) amita@in.ibm.com

// Alagaraja Ramasubramanian (alags_raj@in.ibm.com) for Bug#1090

// Sushma Fernandes (sushma@hp.com) for Bug#2057

// Josephine Eskaline Joyce (jojustin@in.ibm.com) for PEP#101

// Roger Kumpf, Hewlett-Packard Company (roger_kumpf@hp.com)

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

#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>

#include <Pegasus/Common/MessageQueueService.h>

#include <Pegasus/Common/Exception.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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# include <netinet/in.h>

# include <netdb.h>

# include <arpa/inet.h>

# include <unistd.h>

#endif

PEGASUS_USING_STD;

PEGASUS_NAMESPACE_BEGIN

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

// Define a platform-neutral socket length type

#if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) || defined(PEGASUS_OS_VMS)

// MonitorRep

typedef size_t PEGASUS_SOCKLEN_T;

#elif defined(PEGASUS_PLATFORM_AIX_RS_IBMCXX) || defined(PEGASUS_OS_LINUX) || (defined(PEGASUS_OS_SOLARIS) && !defined(SUNOS_5_6))

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

typedef socklen_t PEGASUS_SOCKLEN_T;

#else

typedef int PEGASUS_SOCKLEN_T;

#endif

struct MonitorRep

static AtomicInt _connections = 0;

{

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;

};

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

Line 81

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

#define MAX_NUMBER_OF_MONITOR_ENTRIES 32

Monitor::Monitor()

: _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();

_entries.reserveCapacity(numberOfMonitorEntriesToAllocate);

// setup the tickler

initializeTickler();

_rep = new MonitorRep;

// Start the count at 1 because initilizeTickler()

FD_ZERO(&_rep->rd_fd_set);

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

FD_ZERO(&_rep->wr_fd_set);

// _entries array

FD_ZERO(&_rep->ex_fd_set);

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

{

delete _rep;

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

try{

if(_tickle_peer_socket >= 0)

{

Socket::close(_tickle_peer_socket);

}

if(_tickle_client_socket >= 0)

{

Socket::close(_tickle_client_socket);

}

if(_tickle_server_socket >= 0)

{

Socket::close(_tickle_server_socket);

}

catch(...)

{

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

"Failed to close tickle sockets");

}

Socket::uninitializeInterface();

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

"returning from monitor destructor");

}

Boolean Monitor::run(Uint32 milliseconds)

void Monitor::initializeTickler(){

{

#ifdef PEGASUS_OS_TYPE_WINDOWS

NOTE: On any errors trying to

setup out tickle connection,

throw an exception/end the server

/* setup the tickle server/listener */

// get a socket for the server side

if((_tickle_server_socket = ::socket(PF_INET, SOCK_STREAM, 0)) < 0){

//handle error

MessageLoaderParms parms("Common.Monitor.TICKLE_CREATE",

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

#if !defined(PEGASUS_OS_TYPE_WINDOWS)

errno);

#else

WSAGetLastError());

#endif

throw Exception(parms);

}

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

// initialize the address

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

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

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

#ifdef PEGASUS_OS_ZOS

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

#else

#ifdef PEGASUS_PLATFORM_OS400_ISERIES_IBM

#pragma convert(37)

#endif

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

#ifdef PEGASUS_PLATFORM_OS400_ISERIES_IBM

#pragma convert(0)

#endif

_tickle_server_addr.sin_family = PF_INET;

_tickle_server_addr.sin_port = 0;

if (_entries.size() == 0)

PEGASUS_SOCKLEN_T _addr_size = sizeof(_tickle_server_addr);

Sleep(milliseconds);

// bind server side to socket

if((::bind(_tickle_server_socket,

reinterpret_cast<struct sockaddr*>(&_tickle_server_addr),

sizeof(_tickle_server_addr))) < 0){

// handle error

#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.",

#if !defined(PEGASUS_OS_TYPE_WINDOWS)

errno);

#else

WSAGetLastError());

#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){

// handle error

MessageLoaderParms parms("Common.Monitor.TICKLE_LISTEN",

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

#if !defined(PEGASUS_OS_TYPE_WINDOWS)

errno);

#else

WSAGetLastError());

#endif

throw Exception(parms);

}

static int count = 0;

// 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){

// handle error

MessageLoaderParms parms("Common.Monitor.TICKLE_SOCKNAME",

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

#if !defined(PEGASUS_OS_TYPE_WINDOWS)

errno);

#else

WSAGetLastError());

#endif

throw Exception(parms);

}

if (count == 0)

/* set up the tickle client/connector */

{

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;

// get a socket for our tickle client

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

if((_tickle_client_socket = ::socket(PF_INET, SOCK_STREAM, 0)) < 0){

struct timeval tv = { SECONDS, MICROSECONDS };

// handle error

MessageLoaderParms parms("Common.Monitor.TICKLE_CLIENT_CREATE",

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

#if !defined(PEGASUS_OS_TYPE_WINDOWS)

errno);

#else

WSAGetLastError());

#endif

throw Exception(parms);

}

// setup the address of the client

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

#ifdef PEGASUS_OS_ZOS

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

#else

#ifdef PEGASUS_PLATFORM_OS400_ISERIES_IBM

#pragma convert(37)

#endif

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

#ifdef PEGASUS_PLATFORM_OS400_ISERIES_IBM

#pragma convert(0)

#endif

_tickle_client_addr.sin_family = PF_INET;

_tickle_client_addr.sin_port = 0;

count = select(

// bind socket to client side

FD_SETSIZE,

if((::bind(_tickle_client_socket,

&_rep->active_rd_fd_set,

reinterpret_cast<struct sockaddr*>(&_tickle_client_addr),

&_rep->active_wr_fd_set,

sizeof(_tickle_client_addr))) < 0){

&_rep->active_ex_fd_set,

// handle error

&tv);

MessageLoaderParms parms("Common.Monitor.TICKLE_CLIENT_BIND",

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

#if !defined(PEGASUS_OS_TYPE_WINDOWS)

errno);

#else

WSAGetLastError());

#endif

throw Exception(parms);

}

if (count == 0)

// connect to server side

return false;

if((::connect(_tickle_client_socket,

#ifdef PEGASUS_OS_TYPE_WINDOWS

reinterpret_cast<struct sockaddr*>(&_tickle_server_addr),

else if (count == SOCKET_ERROR)

sizeof(_tickle_server_addr))) < 0){

// handle error

MessageLoaderParms parms("Common.Monitor.TICKLE_CLIENT_CONNECT",

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

#if !defined(PEGASUS_OS_TYPE_WINDOWS)

errno);

#else

else if (count == -1)

WSAGetLastError());

#endif

throw Exception(parms);

}

/* set up the slave connection */

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

PEGASUS_SOCKLEN_T peer_size = sizeof(_tickle_peer_addr);

pegasus_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 !defined(PEGASUS_OS_TYPE_WINDOWS)

// Only retry on non-windows platforms.

if(_tickle_peer_socket == -1 && errno == EAGAIN)

{

int retries = 0;

{

pegasus_sleep(1);

_tickle_peer_socket = ::accept(_tickle_server_socket,

reinterpret_cast<struct sockaddr*>(&_tickle_peer_addr),

&peer_size);

retries++;

} while(_tickle_peer_socket == -1 && errno == EAGAIN && retries < 20);

}

#endif

}

if(_tickle_peer_socket == -1){

// handle error

MessageLoaderParms parms("Common.Monitor.TICKLE_ACCEPT",

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

#if !defined(PEGASUS_OS_TYPE_WINDOWS)

errno);

#else

WSAGetLastError());

#endif

throw Exception(parms);

}

// 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;

_entries.append(entry);

}

void Monitor::tickle(void)

{

static char _buffer[] =

{

count = 0;

'0','0'

return false;

};

AutoMutex autoMutex(_tickle_mutex);

Socket::disableBlocking(_tickle_client_socket);

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

Socket::enableBlocking(_tickle_client_socket);

}

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

{

// Set the state to requested state

_entries[index]._status = status;

}

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

Boolean Monitor::run(Uint32 milliseconds)

{

Sint32 socket = _entries[i].socket;

Uint32 events = 0;

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

Boolean handled_events = false;

events |= SocketMessage::READ;

int i = 0;

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

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

fd_set fdread;

events |= SocketMessage::WRITE;

FD_ZERO(&fdread);

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

AutoMutex autoEntryMutex(_entry_mut);

events |= SocketMessage::EXCEPTION;

if (events)

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

if (_stopConnections == 1)

{

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

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

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

{

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

{

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

{

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

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

{

// remove the entry

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

}

else

{

// set status to DYING

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

}

_stopConnections = 0;

_stopConnectionsSem.signal();

}

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

{

const _MonitorEntry &entry = _entries[indx];

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

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

{

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

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)

if (h._responsePending == true)

{

Tracer::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();

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

// 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 (!queue)

autoEntryMutex.unlock();

unsolicitSocketMessages(_entries[i].queueId);

o.enqueue(message);

autoEntryMutex.lock();

}

Uint32 _idleEntries = 0;

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

queue->enqueue(message);

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.

int maxSocketCurrentPass = 0;

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

{

if(maxSocketCurrentPass < _entries[indx].socket)

maxSocketCurrentPass = _entries[indx].socket;

if (events & SocketMessage::WRITE)

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

{

FD_CLR(socket, &_rep->active_wr_fd_set);

_idleEntries++;

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

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

"Monitor::run FD_CLR WRITE");

}

if (events & SocketMessage::EXCEPTION)

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

descriptors starting at 0.

maxSocketCurrentPass++;

autoEntryMutex.unlock();

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

autoEntryMutex.lock();

#ifdef PEGASUS_OS_TYPE_WINDOWS

if(events == SOCKET_ERROR)

#else

if(events == -1)

#endif

{

FD_CLR(socket, &_rep->active_ex_fd_set);

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

"Monitor::run FD_CLR EXECEPTION");

"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)

{

Tracer::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.value() == _MonitorEntry::IDLE) &&

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

{

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

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

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

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

PEGASUS_ASSERT(q !=0);

if (events & SocketMessage::READ)

try

{

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

{

FD_CLR(socket, &_rep->active_rd_fd_set);

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

"Monitor::run FD_CLR READ");

"_entries[indx].type for indx = %d is Monitor::CONNECTION", indx);

}

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

count--;

// 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))

{

Tracer::trace(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);

Tracer::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 (...)

return false;

{

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

"Monitor::_dispatch: exception received");

}

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

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

Boolean Monitor::solicitSocketMessages(

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

Sint32 socket,

// The following will fail in that case.

Uint32 events,

// PEGASUS_ASSERT(dst->_monitor->_entries[dst->_entry_index]._status.value() == _MonitorEntry::BUSY);

Uint32 queueId)

// 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];

Socket::disableBlocking(_entries[indx].socket);

Sint32 amt = Socket::read(_entries[indx].socket,&buffer, 2);

Socket::enableBlocking(_entries[indx].socket);

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

}

else

{

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

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

"Non-connection entry, indx = %d, has been received.", indx);

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

int events = 0;

events |= SocketMessage::READ;

Uint32 pos = _findEntry(socket);

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

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

autoEntryMutex.unlock();

q->enqueue(msg);

autoEntryMutex.lock();

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

if (pos != PEGASUS_NOT_FOUND)

return true;

}

catch(...)

{

PEG_METHOD_EXIT();

}

return false;

handled_events = true;

}

// Set the events:

return(handled_events);

}

if (events & SocketMessage::READ)

void Monitor::stopListeningForConnections(Boolean wait)

FD_SET(socket, &_rep->rd_fd_set);

{

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

// set boolean then tickle the server to recognize _stopConnections

_stopConnections = 1;

tickle();

if (events & SocketMessage::WRITE)

if (wait)

FD_SET(socket, &_rep->wr_fd_set);

{

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

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

// is still accepting connections on them.

try

{

_stopConnectionsSem.time_wait(10000);

}

catch (TimeOut &)

{

// The monitor is probably busy processng a very long request, and is

// not accepting connections. Let the caller unbind the ports.

}

if (events & SocketMessage::EXCEPTION)

PEG_METHOD_EXIT();

FD_SET(socket, &_rep->ex_fd_set);

}

// Add the entry to the list:

_MonitorEntry entry = { socket, queueId };

int Monitor::solicitSocketMessages(

Sint32 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.value() == _MonitorEntry::EMPTY)

{

_entries[index].socket = socket;

_entries[index].queueId = queueId;

_entries[index]._type = type;

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

return index;

}

catch(...)

{

}

_solicitSocketCount--; // decrease the count, if we are here we didnt do anything meaningful

PEG_METHOD_EXIT();

return true;

return -1;

}

Boolean Monitor::unsolicitSocketMessages(Sint32 socket)

void Monitor::unsolicitSocketMessages(Sint32 socket)

{

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

// Look for the given entry and remove it:

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

AutoMutex autoMut(_entry_mut);

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 = -1;

FD_CLR(socket, &_rep->wr_fd_set);

_solicitSocketCount--;

FD_CLR(socket, &_rep->ex_fd_set);

break;

_entries.remove(i);

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 == _MonitorEntry::EMPTY){

if(_entries.size() > MAX_NUMBER_OF_MONITOR_ENTRIES)

_entries.remove(index);

index--;

}

PEG_METHOD_EXIT();

return false;

}

Uint32 Monitor::_findEntry(Sint32 socket) const

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

PEGASUS_THREAD_RETURN PEGASUS_THREAD_CDECL Monitor::_dispatch(void *parm)

{

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

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

Tracer::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 (...)

{

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

"Monitor::_dispatch: exception received");

}

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

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

return PEG_NOT_FOUND;

PEGASUS_ASSERT(dst->_monitor->_entries[dst->_entry_index]._status.value() == _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;

}

return 0;

}

PEGASUS_NAMESPACE_END

Legend:

Removed from v.1.6
changed lines
	Added in v.1.94

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