Mercurial > octave-libtiff
view liboctave/system/child-list.h @ 23219:3ac9f9ecfae5 stable
maint: Update copyright dates.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 22 Feb 2017 12:39:29 -0500 |
parents | e9a0469dedd9 |
children | 092078913d54 |
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/* Copyright (C) 1993-2017 John W. Eaton This file is part of Octave. Octave 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. Octave 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 Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #if ! defined (octave_child_list_h) #define octave_child_list_h 1 #include "octave-config.h" #include <csignal> #include <sys/types.h> #include "base-list.h" namespace octave { class OCTAVE_API child { public: // Do whatever to handle event for child with PID (might not // actually be dead, could just be stopped). Return true if // the list element corresponding to PID should be removed from // list. This function should not call any functions that modify // the child_list. typedef bool (*child_event_handler) (pid_t, int); child (pid_t id = -1, child_event_handler f = 0) : pid (id), handler (f), have_status (0), status (0) { } child (const child& oc) : pid (oc.pid), handler (oc.handler), have_status (oc.have_status), status (oc.status) { } child& operator = (const child& oc) { if (&oc != this) { pid = oc.pid; handler = oc.handler; have_status = oc.have_status; status = oc.status; } return *this; } ~child (void) { } // The process id of this child. pid_t pid; // The function we call if an event happens for this child. child_event_handler handler; // Nonzero if this child has stopped or terminated. sig_atomic_t have_status; // The status of this child; 0 if running, otherwise a status value // from waitpid. int status; }; class OCTAVE_API child_list { protected: child_list (void) { } class child_list_rep : public base_list<child> { public: void insert (pid_t pid, child::child_event_handler f); void reap (void); bool wait (void); }; public: ~child_list (void) { } static void insert (pid_t pid, child::child_event_handler f); static void reap (void); static bool wait (void); static void remove (pid_t pid); private: static bool instance_ok (void); static child_list_rep *instance; static void cleanup_instance (void) { delete instance; instance = 0; } }; } #if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS) OCTAVE_DEPRECATED ("use 'octave::child' instead") typedef octave::child octave_child; OCTAVE_DEPRECATED ("use 'octave::child_list' instead") typedef octave::child_list octave_child_list; #endif #endif