Mercurial > octave
view libinterp/corefcn/event-queue.h @ 22865:89756f2f085b
use c++11 style for deleting default copy constructor and assignment operator
* octave-gui.h, resource-manager.h, shortcut-manager.h,
base-text-renderer.h, c-file-ptr-stream.h, dynamic-ld.cc,
dynamic-ld.h, event-queue.h, ft-text-renderer.cc, gl-render.cc,
gl-render.h, graphics.cc, graphics.in.h, interpreter.h, mex.cc,
mxarray.in.h, oct-fstrm.h, oct-iostrm.h, oct-prcstrm.h, oct-procbuf.h,
oct-stdstrm.h, oct-stream.cc, oct-stream.h, oct-strstrm.h,
octave-link.h, pager.h, profiler.h, sighandlers.cc, symtab.h,
text-renderer.h, zfstream.h, __init_fltk__.cc, ov-builtin.h,
ov-dld-fcn.h, ov-fcn.h, ov-mex-fcn.h, ov-typeinfo.h, ov-usr-fcn.h,
octave.h, lex.h, parse.h, pt-arg-list.h, pt-array-list.h, pt-assign.h,
pt-binop.h, pt-bp.h, pt-cbinop.h, pt-cell.h, pt-check.h,
pt-classdef.h, pt-cmd.h, pt-colon.h, pt-const.h, pt-decl.h, pt-eval.h,
pt-except.h, pt-exp.h, pt-fcn-handle.h, pt-funcall.h, pt-id.h,
pt-idx.h, pt-jump.h, pt-loop.h, pt-mat.h, pt-misc.h, pt-pr-code.h,
pt-select.h, pt-stmt.h, pt-unop.h, pt-walk.h, pt.h, token.h, Array.cc,
idx-vector.h, oct-fftw.h, sparse-chol.cc, sparse-qr.cc, file-ops.h,
mach-info.h, oct-env.h, action-container.h, cmd-edit.cc, cmd-edit.h,
cmd-hist.h, oct-locbuf.h, oct-mutex.h, oct-shlib.cc, oct-sort.h,
pathsearch.h, singleton-cleanup.h, unwind-prot.h, url-transfer.cc,
url-transfer.h:
Use C++11 style "= delete" declaration to declare copy constructors
and assignment operators for classes that should not be copied.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Mon, 05 Dec 2016 22:59:37 -0500 |
parents | 3a2b891d0b33 |
children | f75d289645ec |
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/* Copyright (C) 2012-2016 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_event_queue_h) #define octave_event_queue_h 1 #include "octave-config.h" #include <queue> #include <memory> #include "action-container.h" class event_queue : public action_container { public: event_queue (void) : fifo () { } // Destructor should not raise an exception, so all actions // registered should be exception-safe. If you're not sure, see // event_queue_safe. ~event_queue (void) { run (); } void add (elem *new_elem) { fifo.push (new_elem); } void run_first (void) { if (! empty ()) { // No leak on exception! std::unique_ptr<elem> ptr (fifo.front ()); fifo.pop (); ptr->run (); } } void discard_first (void) { if (! empty ()) { elem *ptr = fifo.front (); fifo.pop (); delete ptr; } } size_t size (void) const { return fifo.size (); } protected: std::queue<elem *> fifo; private: // No copying! event_queue (const event_queue&) = delete; event_queue& operator = (const event_queue&) = delete; }; // Like event_queue, but this one will guard against the // possibility of seeing an exception (or interrupt) in the cleanup actions. // Not that we can do much about it, but at least we won't crash. class event_queue_safe : public event_queue { private: void warn_unhandled_exception (void) const; public: event_queue_safe (void) : event_queue () { } ~event_queue_safe (void) { while (! empty ()) { try { run_first (); } catch (...) // Yes, the black hole. Remember we're in a dtor. { warn_unhandled_exception (); } } } private: // No copying! event_queue_safe (const event_queue_safe&) = delete; event_queue_safe& operator = (const event_queue_safe&) = delete; }; #endif