Mercurial > octave
view liboctave/system/child-list.cc @ 30173:f8ee588f1c7d
maint: Replace pid_equal helper class with lambda function.
* child-list.cc: Delete pid_equal helper class.
* child-list.cc (remove): Use lambda function in call to remove_if().
author | Rik <rik@octave.org> |
---|---|
date | Tue, 14 Sep 2021 10:34:28 -0700 |
parents | a8c61e096c68 |
children | 796f54d4ddbf |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1993-2021 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // 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 { void child_list::remove (pid_t pid) { m_list.remove_if ([pid] (const child& oc) { return oc.m_pid == 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.m_have_status) { oc.m_have_status = 0; child::child_event_handler f = oc.m_handler; if (f && f (oc.m_pid, oc.m_status)) oc.m_pid = -1; } } // Remove PIDs that have completed above. 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.m_pid; if (pid > 0) { int status; if (sys::waitpid (pid, &status, sys::wnohang ()) > 0) { oc.m_have_status = 1; oc.m_status = status; retval = true; break; } } } return retval; } }