Mercurial > octave
view libinterp/corefcn/event-queue.h @ 21747:61f3575250e4
rats: Fix round-off corner case for 32-bit systems (bug #47964)
* pr-output.cc (rational_approx): Invert convergence test to prevent
aborting early due to round-off error in 32-bit environments. Use std::abs
instead of fabs.
author | Mike Miller <mtmiller@octave.org> |
---|---|
date | Thu, 19 May 2016 15:47:24 -0700 |
parents | 61c96c37ce69 |
children | b571fc85953f |
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/* Copyright (C) 2012-2015 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&); event_queue& operator = (const event_queue&); }; // 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&); event_queue_safe& operator = (const event_queue_safe&); }; #endif