Mercurial > octave
view liboctave/system/child-list.cc @ 27919:1891570abac8
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2020.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 06 Jan 2020 22:29:51 -0500 |
parents | b442ec6dda5c |
children | bd51beb6205e |
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/* Copyright (C) 1993-2020 The Octave Project Developers See the file COPYRIGHT.md in the top-level directory of this distribution or <https://octave.org/COPYRIGHT.html/>. 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 <https://www.gnu.org/licenses/>. */ #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include "child-list.h" #include "oct-syscalls.h" namespace octave { class pid_equal { public: pid_equal (pid_t v) : val (v) { } bool operator () (const child& oc) const { return oc.pid == val; } private: pid_t val; }; void child_list::remove (pid_t pid) { m_list.remove_if (pid_equal (pid)); } void child_list::child_list::insert (pid_t pid, child::child_event_handler f) { m_list.append (child (pid, f)); } void child_list::reap (void) { // Mark the record for PID invalid. for (auto& oc : m_list) { // The call to the child::child_event_handler might // invalidate the iterator (for example, by calling // child_list::remove), so we increment the iterator // here. if (oc.have_status) { oc.have_status = 0; child::child_event_handler f = oc.handler; if (f && f (oc.pid, oc.status)) oc.pid = -1; } } // ?? remove (-1); } // Wait on our children and record any changes in their status. bool child_list::wait (void) { bool retval = false; for (auto& oc : m_list) { pid_t pid = oc.pid; if (pid > 0) { int status; if (sys::waitpid (pid, &status, sys::wnohang ()) > 0) { oc.have_status = 1; oc.status = status; retval = true; break; } } } return retval; } }