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

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Diff for /pegasus/src/Pegasus/Common/Monitor.cpp between version 1.1.2.9 and 1.116.4.2

version 1.1.2.9, 2001/11/16 17:46:21

version 1.116.4.2, 2007/12/14 20:47:55

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

//%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

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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"

#include "MessageQueue.h"

#include "Socket.h"

#include <Pegasus/Common/Tracer.h>

#ifdef PEGASUS_OS_TYPE_WINDOWS

#include <Pegasus/Common/HTTPConnection.h>

# define FD_SETSIZE 1024

#include <Pegasus/Common/MessageQueueService.h>

# include <winsock2.h>

#include <Pegasus/Common/Exception.h>

#else

#include "ArrayIterator.h"

# include <sys/types.h>

#include <errno.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()

: _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()

{

uninitializeTickler();

Socket::uninitializeInterface();

PEG_TRACE_CSTRING(TRC_HTTP, Tracer::LEVEL4,

"returning from monitor destructor");

}

void Monitor::uninitializeTickler()

{

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

Boolean Monitor::run(Uint32 milliseconds)

try

{

#ifdef PEGASUS_OS_TYPE_WINDOWS

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 (...)

{

PEG_TRACE_CSTRING(TRC_HTTP, Tracer::LEVEL4,

"Failed to close tickle sockets");

}

// 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));

#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;

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

SocketLength _addr_size = sizeof(_tickle_server_addr);

// there were no undispatched events from last time.

static int count = 0;

// 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);

}

if (count == 0)

// tell the kernel we are a server

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

{

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

MessageLoaderParms parms(

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

"Common.Monitor.TICKLE_LISTEN",

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

"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));

#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;

const Uint32 SEC = milliseconds / 1000;

// bind socket to client side

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

if ((::bind(_tickle_client_socket,

struct timeval tv = { SEC, USEC };

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

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;

count = select(

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

FD_SETSIZE,

if (_entries.size()==0)

&_rep->active_rd_fd_set,

{

&_rep->active_wr_fd_set,

// if yes, append a new entry

&_rep->active_ex_fd_set,

_entries.append(entry);

&tv);

}

else

{

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

_entries[0]=entry;

}

if (count == 0)

void Monitor::tickle()

return false;

{

#ifdef PEGASUS_OS_TYPE_WINDOWS

static char _buffer[] =

else if (count == SOCKET_ERROR)

#else

else if (count == -1)

#endif

{

count = 0;

'0','0'

return false;

};

AutoMutex autoMutex(_tickle_mutex);

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

}

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++)

void Monitor::run(Uint32 milliseconds)

{

Sint32 socket = _entries[i].socket;

Uint32 events = 0;

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

int i = 0;

events |= SocketMessage::READ;

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

fd_set fdread;

FD_ZERO(&fdread);

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

AutoMutex autoEntryMutex(_entry_mut);

events |= SocketMessage::WRITE;

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

ArrayIterator<_MonitorEntry> entries(_entries);

events |= SocketMessage::EXCEPTION;

if (events)

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

// entries

if (_stopConnections.get() == 1)

{

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

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

{

// set status to DYING

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

}

_stopConnections = 0;

_stopConnectionsSem.signal();

}

if (!queue)

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

unsolicitSocketMessages(_entries[i].queueId);

{

const _MonitorEntry &entry = entries[indx];

if ((entry._status.get() == _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;

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

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

queue->enqueue(message);

// 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 (events & SocketMessage::WRITE)

if (h._responsePending == true)

{

FD_CLR(socket, &_rep->active_wr_fd_set);

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();

if (events & SocketMessage::EXCEPTION)

// HTTPAcceptor is responsible for closing the connection.

{

// The lock is released to allow HTTPAcceptor to call

FD_CLR(socket, &_rep->active_ex_fd_set);

// 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);

_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 & SocketMessage::READ)

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++)

{

FD_CLR(socket, &_rep->active_rd_fd_set);

if (maxSocketCurrentPass < entries[indx].socket)

}

maxSocketCurrentPass = entries[indx].socket;

count--;

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

return true;

{

_idleEntries++;

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

}

return false;

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();

struct timeval timeNow;

Time::gettimeofday(&timeNow);

// 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);

Boolean Monitor::solicitSocketMessages(

try

Sint32 socket,

{

Uint32 events,

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

Uint32 queueId)

{

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

PEG_TRACE((TRC_HTTP, Tracer::LEVEL4,

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

"Monitor::CONNECTION",

indx));

HTTPConnection *dst =

reinterpret_cast<HTTPConnection *>(q);

dst->_entry_index = indx;

Uint32 pos = _findEntry(socket);

// Update idle start time because we have received some

// data. Any data is good data at this point, and we'll

// keep the connection alive, even if we've exceeded

// the idleConnectionTimeout, which will be checked

// when we call closeConnectionOnTimeout() next.

Time::gettimeofday(&dst->_idleStartTime);

if (pos != PEGASUS_NOT_FOUND)

// Check for accept pending (ie. SSL handshake pending)

return false;

// or idle connection timeouts for sockets from which

// we received data (avoiding extra queue lookup below).

if (!dst->closeConnectionOnTimeout(&timeNow))

{

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));

// Set the events:

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));

}

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

{

// set ourself to BUSY,

// read the data

// and set ourself back to IDLE

if (events & SocketMessage::READ)

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

FD_SET(socket, &_rep->rd_fd_set);

static char buffer[2];

Sint32 amt =

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

if (events & SocketMessage::WRITE)

if (amt == PEGASUS_SOCKET_ERROR &&

FD_SET(socket, &_rep->wr_fd_set);

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

{

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();

if (events & SocketMessage::EXCEPTION)

// After enqueue a message and the autoEntryMutex has

FD_SET(socket, &_rep->ex_fd_set);

// 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 (...)

{

}

// else check for accept pending (ie. SSL handshake pending) or

// idle connection timeouts for sockets from which we did not

// receive data.

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

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

{

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

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

dst->_entry_index = indx;

dst->closeConnectionOnTimeout(&timeNow);

}

// else if "events" is zero (ie. select timed out) then we still need

// to check if there are any pending SSL handshakes that have timed out.

else

{

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

{

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

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

{

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

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

dst->_entry_index = indx;

dst->closeConnectionOnTimeout(&timeNow);

}

void Monitor::stopListeningForConnections(Boolean wait)

{

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

// set boolean then tickle the server to recognize _stopConnections

_stopConnections = 1;

tickle();

if (wait)

{

// 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.

_stopConnectionsSem.wait();

}

PEG_METHOD_EXIT();

}

// Add the entry to the list:

_MonitorEntry entry = { socket, queueId };

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);

}

// 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 true;

return index;

}

catch (...)

{

}

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

_solicitSocketCount--;

PEG_METHOD_EXIT();

return -1;

}

Boolean Monitor::unsolicitSocketMessages(Sint32 socket)

void Monitor::unsolicitSocketMessages(SocketHandle socket)

{

// 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 = PEGASUS_INVALID_SOCKET;

FD_CLR(socket, &_rep->wr_fd_set);

_solicitSocketCount--;

FD_CLR(socket, &_rep->ex_fd_set);

break;

_entries.remove(i);

return true;

}

return false;

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();

}

Uint32 Monitor::_findEntry(Sint32 socket) const

// 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 (...)

{

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);

return PEG_NOT_FOUND;

// 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.1.1.2.9
changed lines
	Added in v.1.116.4.2

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