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AgentM.C
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C/C++ Source or Header
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1998-03-25
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3KB
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138 lines
// $Id: AgentM.C,v 1.10 1998/03/25 12:42:10 zeller Exp $
// Agent Manager
// Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
// Written by Andreas Zeller <zeller@ips.cs.tu-bs.de>.
//
// This file is part of DDD.
//
// DDD is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// DDD is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with DDD -- see the file COPYING.
// If not, write to the Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// DDD is the data display debugger.
// For details, see the DDD World-Wide-Web page,
// `http://www.cs.tu-bs.de/softech/ddd/',
// or send a mail to the DDD developers <ddd@ips.cs.tu-bs.de>.
char AgentM_rcsid[] =
"$Id: AgentM.C,v 1.10 1998/03/25 12:42:10 zeller Exp $";
#ifdef __GNUG__
#pragma implementation
#endif
#include "AgentM.h"
#include "Agent.h"
#include "SignalB.h"
#include "config.h"
extern "C" {
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
}
DEFINE_TYPE_INFO_0(AgentManager)
#if 0
#include "SignalC.h"
// Make sure to call all destructors, even when a signal comes
static SignalCleanup hasta_la_vista_you_filthy_agents;
#endif
// Add an agent
void AgentManager::operator += (Agent *key)
{
for (Agent *c = first; c != 0; c = c->next)
if (c == key)
return;
SignalBlocker sb(SIGCHLD);
key->next = first;
first = key;
}
// Remove an agent
void AgentManager::operator -= (Agent *key)
{
Agent *prev = 0;
for (Agent *c = first; c != 0; c = c->next)
{
if (c == key)
{
SignalBlocker sb(SIGCHLD);
if (prev == 0)
first = c->next;
else
prev->next = c->next;
}
else
{
prev = c;
}
}
}
// Search an agent
Agent *AgentManager::search(int pid)
{
for (Agent *c = first; c != 0; c = c->next)
if (pid == c->pid())
return c;
return 0;
}
// Commit all pending changes
void AgentManager::commit()
{
for (Agent *c = first; c != 0; c = c->next)
c->commit();
}
// Agent Manager Destructor: called at the end of the show
AgentManager::~AgentManager()
{
// Terminate using low-level functions
for (Agent *c = first; c != 0; c = c->next)
c->terminate(true);
}
// Process status change
bool AgentManager::childStatusChange()
{
bool gotit = false;
for (Agent *c = first; c != 0; c = c->next)
{
pid_t pid = c->pid();
int status;
if (pid > 0 && waitpid(pid, &status, WNOHANG) == pid)
{
c->callHandlers(_Died, (void *)status);
gotit = true;
}
}
return gotit;
}