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# FIX::SocketMonitor Class Reference

Monitors events on a collection of sockets. More...

`#include <SocketMonitor.h>`

List of all members.

## Classes

class | Strategy

## Public Member Functions

| SocketMonitor (int timeout=0)
virtual | ~SocketMonitor ()
bool | addConnect (int socket)
bool | addRead (int socket)
bool | addWrite (int socket)
bool | drop (int socket)
void | signal (int socket)
void | unsignal (int socket)
void | block (Strategy &strategy, bool poll=0, double timeout=0.0)
int | numSockets ()

## Private Types

typedef std::set< int > | Sockets
typedef std::queue< int > | Queue

## Private Member Functions

void | setsockopt ()
bool | bind ()
bool | listen ()
void | buildSet (const Sockets &, fd_set &)
timeval * | getTimeval (bool poll, double timeout)
bool | sleepIfEmpty (bool poll)
void | processReadSet (Strategy &, fd_set &)
void | processWriteSet (Strategy &, fd_set &)
void | processExceptSet (Strategy &, fd_set &)

## Private Attributes

int | m_timeout
timeval | m_timeval
clock_t | m_ticks
int | m_signal
int | m_interrupt
Sockets | m_connectSockets
Sockets | m_readSockets
Sockets | m_writeSockets
Queue | m_dropped

## Detailed Description

Monitors events on a collection of sockets.

Definition at line 47 of file SocketMonitor.h.

## Member Typedef Documentation

typedef std::queue< int > FIX::SocketMonitor::Queue`[private]`

Definition at line 68 of file SocketMonitor.h.

typedef std::set< int > FIX::SocketMonitor::Sockets`[private]`

Definition at line 67 of file SocketMonitor.h.

## Constructor & Destructor Documentation

FIX::SocketMonitor::SocketMonitor | ( | int | timeout = `0` | ) |

Definition at line 36 of file SocketMonitor.cpp.

References m_interrupt, m_readSockets, m_signal, m_ticks, m_timeval, FIX::socket_createpair(), FIX::socket_init(), and FIX::socket_setnonblock().

    00037 : m_timeout( timeout )
    00038 {
    00039   socket_init();
    00040
    00041   std::pair<int, int> sockets = socket_createpair();
    00042   m_signal = sockets.first;
    00043   m_interrupt = sockets.second;
    00044   socket_setnonblock( m_signal );
    00045   socket_setnonblock( m_interrupt );
    00046   m_readSockets.insert( m_interrupt );
    00047
    00048   m_timeval.tv_sec = 0;
    00049   m_timeval.tv_usec = 0;
    00050 #ifndef SELECT_DECREMENTS_TIME
    00051   m_ticks = clock();
    00052 #endif
    00053 }

FIX::SocketMonitor::~SocketMonitor | ( |  | ) | `[virtual]`

Definition at line 55 of file SocketMonitor.cpp.

References m_readSockets, m_signal, FIX::socket_close(), and FIX::socket_term().

    00056 {
    00057   Sockets::iterator i;
    00058   for ( i = m_readSockets.begin(); i != m_readSockets.end(); ++i ) {
    00059     socket_close( *i );
    00060   }
    00061
    00062   socket_close( m_signal );
    00063   socket_term();
    00064 }

## Member Function Documentation

bool FIX::SocketMonitor::addConnect | ( | int | socket | ) |

Definition at line 66 of file SocketMonitor.cpp.

References m_connectSockets, QF_STACK_POP, QF_STACK_PUSH, and FIX::socket_setnonblock().

Referenced by FIX::SocketServer::accept(), and FIX::SocketConnector::connect().

    00067 { QF_STACK_PUSH(SocketMonitor::addConnect)
    00068
    00069   socket_setnonblock( s );
    00070   Sockets::iterator i = m_connectSockets.find( s );
    00071   if( i != m_connectSockets.end() ) return false;
    00072
    00073   m_connectSockets.insert( s );
    00074   return true;
    00075
    00076   QF_STACK_POP
    00077 }

bool FIX::SocketMonitor::addRead | ( | int | socket | ) |

Definition at line 79 of file SocketMonitor.cpp.

References m_readSockets, QF_STACK_POP, QF_STACK_PUSH, and FIX::socket_setnonblock().

    00080 { QF_STACK_PUSH(SocketMonitor::addRead)
    00081
    00082   socket_setnonblock( s );
    00083   Sockets::iterator i = m_readSockets.find( s );
    00084   if( i != m_readSockets.end() ) return false;
    00085
    00086   m_readSockets.insert( s );
    00087   return true;
    00088
    00089   QF_STACK_POP
    00090 }

bool FIX::SocketMonitor::addWrite | ( | int | socket | ) |

Definition at line 92 of file SocketMonitor.cpp.

References m_readSockets, m_writeSockets, QF_STACK_POP, QF_STACK_PUSH, and FIX::socket_setnonblock().

Referenced by processReadSet().

    00093 { QF_STACK_PUSH(SocketMonitor::addWrite)
    00094
    00095   if( m_readSockets.find(s) == m_readSockets.end() )
    00096     return false;
    00097
    00098   socket_setnonblock( s );
    00099   Sockets::iterator i = m_writeSockets.find( s );
    00100   if( i != m_writeSockets.end() ) return false;
    00101
    00102   m_writeSockets.insert( s );
    00103   return true;
    00104
    00105   QF_STACK_POP
    00106 }

bool FIX::SocketMonitor::bind | ( |  | ) | `[private]`

void FIX::SocketMonitor::block | ( | Strategy & | strategy,
|  | bool | poll = `0`,
|  | double | timeout = `0.0` |
| ) |  |  |

Definition at line 204 of file SocketMonitor.cpp.

References buildSet(), getTimeval(), m_connectSockets, m_dropped, m_readSockets, m_writeSockets, FIX::SocketMonitor::Strategy::onError(), FIX::SocketMonitor::Strategy::onTimeout(), FIX::Queue< T >::pop(), processExceptSet(), processReadSet(), processWriteSet(), QF_STACK_POP, QF_STACK_PUSH, FIX::Queue< T >::size(), and sleepIfEmpty().

Referenced by FIX::SocketServer::block(), and FIX::SocketConnector::block().

    00205 { QF_STACK_PUSH(SocketMonitor::block)
    00206
    00207   while ( m_dropped.size() )
    00208   {
    00209     strategy.onError( *this, m_dropped.front() );
    00210     m_dropped.pop();
    00211     if ( m_dropped.size() == 0 )
    00212       return ;
    00213   }
    00214
    00215   fd_set readSet;
    00216   FD_ZERO( &readSet );
    00217   buildSet( m_readSockets, readSet );
    00218   fd_set writeSet;
    00219   FD_ZERO( &writeSet );
    00220   buildSet( m_connectSockets, writeSet );
    00221   buildSet( m_writeSockets, writeSet );
    00222   fd_set exceptSet;
    00223   FD_ZERO( &exceptSet );
    00224   buildSet( m_connectSockets, exceptSet );
    00225
    00226   if ( sleepIfEmpty(poll) )
    00227   {
    00228     strategy.onTimeout( *this );
    00229     return;
    00230   }
    00231
    00232   int result = select( FD_SETSIZE, &readSet, &writeSet, &exceptSet, getTimeval(poll, timeout) );
    00233
    00234   if ( result == 0 )
    00235   {
    00236     strategy.onTimeout( *this );
    00237     return;
    00238   }
    00239   else if ( result > 0 )
    00240   {
    00241     processExceptSet( strategy, exceptSet );
    00242     processWriteSet( strategy, writeSet );
    00243     processReadSet( strategy, readSet );
    00244   }
    00245   else
    00246   {
    00247     strategy.onError( *this );
    00248   }
    00249
    00250   QF_STACK_POP
    00251 }

void FIX::SocketMonitor::buildSet | ( | const Sockets & | sockets,
|  | fd_set & | watchSet |
| ) |  |  | `[private]`

Definition at line 363 of file SocketMonitor.cpp.

References QF_STACK_POP, and QF_STACK_PUSH.

Referenced by block().

    00364 { QF_STACK_PUSH(SocketMonitor::buildSet)
    00365
    00366   Sockets::const_iterator iter;
    00367   for ( iter = sockets.begin(); iter != sockets.end(); ++iter ) {
    00368     FD_SET( *iter, &watchSet );
    00369   }
    00370   QF_STACK_POP
    00371 }

bool FIX::SocketMonitor::drop | ( | int | socket | ) |

Definition at line 108 of file SocketMonitor.cpp.

References m_connectSockets, m_dropped, m_readSockets, m_writeSockets, FIX::Queue< T >::push(), QF_STACK_POP, QF_STACK_PUSH, and FIX::socket_close().

Referenced by FIX::SocketConnection::disconnect(), FIX::HttpServer::onConnect(), FIX::ServerWrapper::onError(), FIX::SocketConnection::read(), and FIX::SocketConnection::readMessages().

    00109 { QF_STACK_PUSH(SocketMonitor::drop)
    00110
    00111   Sockets::iterator i = m_readSockets.find( s );
    00112   Sockets::iterator j = m_writeSockets.find( s );
    00113   Sockets::iterator k = m_connectSockets.find( s );
    00114
    00115   if ( i != m_readSockets.end() ||
    00116        j != m_writeSockets.end() ||
    00117        k != m_connectSockets.end() )
    00118   {
    00119     socket_close( s );
    00120     m_readSockets.erase( s );
    00121     m_writeSockets.erase( s );
    00122     m_connectSockets.erase( s );
    00123     m_dropped.push( s );
    00124     return true;
    00125   }
    00126   return false;
    00127
    00128   QF_STACK_POP
    00129 }

timeval * FIX::SocketMonitor::getTimeval | ( | bool | poll,
|  | double | timeout |
| ) |  |  | `[inline, private]`

Definition at line 131 of file SocketMonitor.cpp.

References m_ticks, m_timeout, m_timeval, QF_STACK_POP, and QF_STACK_PUSH.

Referenced by block().

    00132 { QF_STACK_PUSH(SocketMonitor::getTimeval)
    00133
    00134   if ( poll )
    00135   {
    00136     m_timeval.tv_sec = 0;
    00137     m_timeval.tv_usec = 0;
    00138     return &m_timeval;
    00139   }
    00140
    00141   timeout = m_timeout;
    00142
    00143   if ( !timeout )
    00144     return 0;
    00145 #ifdef SELECT_MODIFIES_TIMEVAL
    00146   if ( !m_timeval.tv_sec && !m_timeval.tv_usec && timeout )
    00147     m_timeval.tv_sec = timeout;
    00148   return &m_timeval;
    00149 #else
    00150 double elapsed = ( double ) ( clock() - m_ticks ) / ( double ) CLOCKS_PER_SEC;
    00151   if ( elapsed >= timeout || elapsed == 0.0 )
    00152   {
    00153     m_ticks = clock();
    00154     m_timeval.tv_sec = 0;
    00155     m_timeval.tv_usec = (long)(timeout * 1000000);
    00156   }
    00157   else
    00158   {
    00159     m_timeval.tv_sec = 0;
    00160     m_timeval.tv_usec = ( long ) ( ( timeout - elapsed ) * 1000000 );
    00161   }
    00162   return &m_timeval;
    00163 #endif
    00164
    00165   QF_STACK_POP
    00166 }

bool FIX::SocketMonitor::listen | ( |  | ) | `[private]`

int FIX::SocketMonitor::numSockets | ( |  | ) | `[inline]`

Definition at line 63 of file SocketMonitor.h.

References m_readSockets.

Referenced by FIX::SocketServer::numConnections().

    00064   { return m_readSockets.size() - 1; }

void FIX::SocketMonitor::processExceptSet | ( | Strategy & | strategy,
|  | fd_set & | exceptSet |
| ) |  |  | `[private]`

Definition at line 339 of file SocketMonitor.cpp.

References m_connectSockets, FIX::SocketMonitor::Strategy::onError(), QF_STACK_POP, and QF_STACK_PUSH.

Referenced by block().

    00340 { QF_STACK_PUSH(SocketMonitor::processExceptSet)
    00341
    00342 #ifdef _MSC_VER
    00343   for ( unsigned i = 0; i < exceptSet.fd_count; ++i )
    00344   {
    00345     int s = exceptSet.fd_array[ i ];
    00346     strategy.onError( *this, s );
    00347   }
    00348 #else
    00349     Sockets::iterator i;
    00350     Sockets sockets = m_connectSockets;
    00351     for ( i = sockets.begin(); i != sockets.end(); ++i )
    00352     {
    00353       int s = *i;
    00354       if ( !FD_ISSET( *i, &exceptSet ) )
    00355         continue;
    00356       strategy.onError( *this, s );
    00357     }
    00358 #endif
    00359
    00360   QF_STACK_POP
    00361 }

void FIX::SocketMonitor::processReadSet | ( | Strategy & | strategy,
|  | fd_set & | readSet |
| ) |  |  | `[private]`

Definition at line 253 of file SocketMonitor.cpp.

References addWrite(), m_interrupt, m_readSockets, FIX::SocketMonitor::Strategy::onEvent(), QF_STACK_POP, and QF_STACK_PUSH.

Referenced by block().

    00254 { QF_STACK_PUSH(SocketMonitor::processReadSet)
    00255
    00256 #ifdef _MSC_VER
    00257   for ( unsigned i = 0; i < readSet.fd_count; ++i )
    00258   {
    00259     int s = readSet.fd_array[ i ];
    00260     if( s == m_interrupt )
    00261     {
    00262       int socket = 0;
    00263       recv( s, (char*)&socket, sizeof(socket), 0 );
    00264       addWrite( socket );
    00265     }
    00266     else
    00267     {
    00268       strategy.onEvent( *this, s );
    00269     }
    00270   }
    00271 #else
    00272     Sockets::iterator i;
    00273     Sockets sockets = m_readSockets;
    00274     for ( i = sockets.begin(); i != sockets.end(); ++i )
    00275     {
    00276       int s = *i;
    00277       if ( !FD_ISSET( *i, &readSet ) )
    00278         continue;
    00279       if( s == m_interrupt )
    00280       {
    00281         int socket = 0;
    00282         recv( s, (char*)&socket, sizeof(socket), 0 );
    00283         addWrite( socket );
    00284       }
    00285       else
    00286       {
    00287         strategy.onEvent( *this, s );
    00288       }
    00289     }
    00290 #endif
    00291
    00292   QF_STACK_POP
    00293 }

void FIX::SocketMonitor::processWriteSet | ( | Strategy & | strategy,
|  | fd_set & | writeSet |
| ) |  |  | `[private]`

Definition at line 295 of file SocketMonitor.cpp.

References m_connectSockets, m_readSockets, m_writeSockets, FIX::SocketMonitor::Strategy::onConnect(), FIX::SocketMonitor::Strategy::onWrite(), QF_STACK_POP, and QF_STACK_PUSH.

Referenced by block().

    00296 { QF_STACK_PUSH(SocketMonitor::processWriteSet)
    00297
    00298 #ifdef _MSC_VER
    00299   for ( unsigned i = 0; i < writeSet.fd_count; ++i )
    00300   {
    00301     int s = writeSet.fd_array[ i ];
    00302     if( m_connectSockets.find(s) != m_connectSockets.end() )
    00303     {
    00304       m_connectSockets.erase( s );
    00305       m_readSockets.insert( s );
    00306       strategy.onConnect( *this, s );
    00307     }
    00308     else
    00309     {
    00310       strategy.onWrite( *this, s );
    00311     }
    00312   }
    00313 #else
    00314   Sockets::iterator i;
    00315   Sockets sockets = m_connectSockets;
    00316   for( i = sockets.begin(); i != sockets.end(); ++i )
    00317   {
    00318     int s = *i;
    00319     if ( !FD_ISSET( *i, &writeSet ) )
    00320       continue;
    00321     m_connectSockets.erase( s );
    00322     m_readSockets.insert( s );
    00323     strategy.onConnect( *this, s );
    00324   }
    00325
    00326   sockets = m_writeSockets;
    00327   for( i = sockets.begin(); i != sockets.end(); ++i )
    00328   {
    00329     int s = *i;
    00330     if ( !FD_ISSET( *i, &writeSet ) )
    00331       continue;
    00332     strategy.onWrite( *this, s );
    00333   }
    00334 #endif
    00335
    00336   QF_STACK_POP
    00337 }

void FIX::SocketMonitor::setsockopt | ( |  | ) | `[private]`

void FIX::SocketMonitor::signal | ( | int | socket | ) |

Definition at line 187 of file SocketMonitor.cpp.

References m_signal, QF_STACK_POP, QF_STACK_PUSH, and FIX::socket_send().

Referenced by FIX::SocketConnection::signal().

    00188 { QF_STACK_PUSH(SocketMonitor::signal)
    00189   socket_send( m_signal, (char*)&socket, sizeof(socket) );
    00190   QF_STACK_POP
    00191 }

bool FIX::SocketMonitor::sleepIfEmpty | ( | bool | poll | ) | `[inline, private]`

Definition at line 168 of file SocketMonitor.cpp.

References m_connectSockets, m_readSockets, m_timeout, m_writeSockets, FIX::process_sleep(), QF_STACK_POP, and QF_STACK_PUSH.

Referenced by block().

    00169 { QF_STACK_PUSH(SocketMonitor::sleepIfEmpty)
    00170
    00171   if( poll )
    00172     return false;
    00173
    00174   if ( m_readSockets.empty() &&
    00175        m_writeSockets.empty() &&
    00176        m_connectSockets.empty() )
    00177   {
    00178     process_sleep( m_timeout );
    00179     return true;
    00180   }
    00181   else
    00182     return false;
    00183
    00184   QF_STACK_POP
    00185 }

void FIX::SocketMonitor::unsignal | ( | int | socket | ) |

Definition at line 193 of file SocketMonitor.cpp.

References m_writeSockets, QF_STACK_POP, and QF_STACK_PUSH.

Referenced by FIX::SocketConnection::unsignal().

    00194 { QF_STACK_PUSH(SocketMonitor::unsignal)
    00195
    00196   Sockets::iterator i = m_writeSockets.find( s );
    00197   if( i == m_writeSockets.end() ) return;
    00198
    00199   m_writeSockets.erase( s );
    00200
    00201   QF_STACK_POP
    00202 }

## Member Data Documentation

Sockets FIX::SocketMonitor::m_connectSockets`[private]`

Definition at line 89 of file SocketMonitor.h.

Referenced by addConnect(), block(), drop(), processExceptSet(), processWriteSet(), and sleepIfEmpty().

Queue FIX::SocketMonitor::m_dropped`[private]`

Definition at line 92 of file SocketMonitor.h.

Referenced by block(), and drop().

int FIX::SocketMonitor::m_interrupt`[private]`

Definition at line 88 of file SocketMonitor.h.

Referenced by processReadSet(), and SocketMonitor().

Sockets FIX::SocketMonitor::m_readSockets`[private]`

Definition at line 90 of file SocketMonitor.h.

Referenced by addRead(), addWrite(), block(), drop(), numSockets(), processReadSet(), processWriteSet(), sleepIfEmpty(), SocketMonitor(), and ~SocketMonitor().

int FIX::SocketMonitor::m_signal`[private]`

Definition at line 87 of file SocketMonitor.h.

Referenced by signal(), SocketMonitor(), and ~SocketMonitor().

clock_t FIX::SocketMonitor::m_ticks`[private]`

Definition at line 84 of file SocketMonitor.h.

Referenced by getTimeval(), and SocketMonitor().

int FIX::SocketMonitor::m_timeout`[private]`

Definition at line 81 of file SocketMonitor.h.

Referenced by getTimeval(), and sleepIfEmpty().

timeval FIX::SocketMonitor::m_timeval`[private]`

Definition at line 82 of file SocketMonitor.h.

Referenced by getTimeval(), and SocketMonitor().

Sockets FIX::SocketMonitor::m_writeSockets`[private]`

Definition at line 91 of file SocketMonitor.h.

Referenced by addWrite(), block(), drop(), processWriteSet(), sleepIfEmpty(), and unsignal().

The documentation for this class was generated from the following files:

- /home/omiller/Development/autobuild/quickfix/src/C++/SocketMonitor.h
- /home/omiller/Development/autobuild/quickfix/src/C++/SocketMonitor.cpp