Mercurial > octave
view liboctave/util/oct-mutex.h @ 23084:ef4d915df748
maint: Merge stable to default.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 23 Jan 2017 14:27:48 -0500 |
parents | bb7513d73673 e9a0469dedd9 |
children | 092078913d54 |
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/* Copyright (C) 2008-2016 Michael Goffioul 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_oct_mutex_h) #define octave_oct_mutex_h 1 #include "octave-config.h" #include "oct-refcount.h" namespace octave { class mutex; class base_mutex { public: friend class mutex; base_mutex (void) : count (1) { } virtual ~base_mutex (void) = default; virtual void lock (void); virtual void unlock (void); virtual bool try_lock (void); private: octave::refcount<int> count; }; class OCTAVE_API mutex { public: mutex (void); mutex (const mutex& m) : rep (m.rep) { rep->count++; } ~mutex (void) { if (--rep->count == 0) delete rep; } mutex& operator = (const mutex& m) { if (rep != m.rep) { if (--rep->count == 0) delete rep; rep = m.rep; rep->count++; } return *this; } void lock (void) { rep->lock (); } void unlock (void) { rep->unlock (); } bool try_lock (void) { return rep->try_lock (); } protected: base_mutex *rep; }; class autolock { public: autolock (const mutex& m, bool block = true) : m_mutex (m), m_lock_result (false) { if (block) { m_mutex.lock (); m_lock_result = true; } else m_lock_result = m_mutex.try_lock (); } // No copying. autolock (const autolock&) = delete; autolock& operator = (const autolock&) = delete; ~autolock (void) { if (m_lock_result) m_mutex.unlock (); } bool ok (void) const { return m_lock_result; } operator bool (void) const { return ok (); } private: mutex m_mutex; bool m_lock_result; }; class OCTAVE_API thread { public: static void init (void); static bool is_thread (void); OCTAVE_DEPRECATED ("use 'octave::is_thread' instead") static bool is_octave_thread (void) { return is_thread (); } }; } #if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS) OCTAVE_DEPRECATED ("use 'octave::mutex' instead") typedef octave::mutex octave_mutex; OCTAVE_DEPRECATED ("use 'octave::base_mutex' instead") typedef octave::base_mutex octave_base_mutex; OCTAVE_DEPRECATED ("use 'octave::autolock' instead") typedef octave::autolock octave_autolock; OCTAVE_DEPRECATED ("use 'octave::thread' instead") typedef octave::thread octave_thread; #endif #endif