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79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
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// -*- C++ -*-
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/**
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* \file forkedcontr.h
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* Copyright 2001 The LyX Team
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* Read COPYING
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*
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* \author Asger Alstrup Nielsen
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* \author Angus Leeming
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*
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* A class for the control of child processes launched using
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* fork() and execvp().
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*/
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#ifndef FORKEDCONTR_H
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#define FORKEDCONTR_H
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#include <list>
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#include <vector>
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#include "LString.h"
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#include <sigc++/signal_system.h>
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#ifdef __GNUG__
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#pragma interface
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#endif
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class Forkedcall;
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class Timeout;
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class ForkedcallsController : public SigC::Object {
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public:
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/// Get hold of the only controller that can exist inside the process.
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static ForkedcallsController & get();
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/// Add a new child process to the list of controlled processes.
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void addCall(Forkedcall const & newcall);
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/** This method is connected to the timer. Every XX ms it is called
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* so that we can check on the status of the children. Those that
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* are found to have finished are removed from the list and their
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* callback function is passed the final return state.
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*/
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void timer();
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/// Return a vector of the pids of all the controlled processes.
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std::vector<pid_t> const getPIDs() const;
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/// Get the command string of the process.
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string const getCommand(pid_t) const;
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/** Kill this process prematurely and remove it from the list.
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* The process is killed within tolerance secs.
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* See forkedcall.[Ch] for details.
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*/
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void kill(pid_t, int tolerance = 5);
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/// Signal emitted when the list of current child processes changes.
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SigC::Signal0<void> childrenChanged;
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private:
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/// Can't create multiple instances of ForkedcallsController.
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ForkedcallsController();
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///
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ForkedcallsController(ForkedcallsController const &);
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///
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~ForkedcallsController();
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/// The child processes
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typedef std::list<Forkedcall *> ListType;
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///
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ListType forkedCalls;
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/** The timer. Enables us to check the status of the children
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* every XX ms and to invoke a callback on completion.
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*/
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Timeout * timeout_;
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};
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#endif // FORKEDCONTR_H
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