// $Id$ // Agent Manager // Copyright (C) 1995 Technische Universitaet Braunschweig, Germany. // Written by Andreas Zeller <zeller@gnu.org>. // // 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 3 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, see <http://www.gnu.org/licenses/>. // // DDD is the data display debugger. // For details, see the DDD World-Wide-Web page, // `http://www.gnu.org/software/ddd/', // or send a mail to the DDD developers <ddd@gnu.org>. // This class is used to perform process-wide actions; // especially terminating child agents upon exiting // and searching an agent with given pid #ifndef _DDD_AgentManager_h #define _DDD_AgentManager_h #include <signal.h> #include "config.h" #include "TypeInfo.h" #include "bool.h" #include "assert.h" #if !defined(SIGCHLD) && defined(SIGCLD) #define SIGCHLD SIGCLD #endif extern "C" { // Sun C++ wants `SignalProc' to be a C funtion typedef void (*SignalProc)(SIGHANDLERARGS); } class Agent; class AgentManager { friend class Agent; private: Agent *first; SignalProc old_pipe_handler; SignalProc old_chld_handler; // Add an agent void operator += (Agent *key); // Remove an agent void operator -= (Agent *key); private: AgentManager(const AgentManager&); AgentManager& operator = (const AgentManager&); public: DECLARE_TYPE_INFO // Constructor AgentManager(SignalProc new_chld_handler = SignalProc(SIG_IGN)): first(0), // Ignore "Broken Pipe" signals old_pipe_handler(SignalProc(signal(SIGPIPE, SignalProc(SIG_IGN)))), // Catch "Death of child" signals old_chld_handler(SignalProc(signal(SIGCHLD, new_chld_handler))) {} // Destructor virtual ~AgentManager(); // Find an agent with given pid Agent *search(int pid); // Process status changes; return true if signal was handled bool childStatusChange(); // Commit all pending changes void commit(); }; #endif // _DDD_AgentManager_h // DON'T ADD ANYTHING BEHIND THIS #endif