Mercurial > octave-nkf
view liboctave/oct-mutex.h @ 13985:43cc49c7abd1
Use thread-safe atomic reference counting (GCC and MSVC).
* configure.ac: New --enable-atomic-refcount argument.
(octave_allocator): Fix USE_OCTAVE_ALLOCATOR variable assignment.
(OCTAVE_CONFIG_INCLUDED): New macro in config.h.
* oct-refcount.h (OCTREFCOUNT_ATOMIC_INCREMENT,
OCTREFCOUNT_ATOMIC_INCREMENT_POST, OCTREFCOUNT_ATOMIC_DECREMENT,
OCTREFCOUNT_ATOMIC_DECREMENT_POST): New macro, defined for MSVC and GCC
when USE_ATOMIC_REFCOUNT is defined.
(octave_refcount:operator++, octave_refcount::operator--): Use them.
(octave_refcount::operator count_type): Cast returned value to volatile.
(octave_refcount::direct): Remove unsafe member.
* Array.h (Array::make_unique): Delete rep if refcount reaches 0.
* Sparse.h (Sparse::make_unique): Delete rep if refcount reaches 0.
* Array.h (Array:~Array, Array::operator=): Delete rep only when refcount is
excatly 0.
* Array.cc (Array::clear): Likewise.
* Sparse.cc (Sparse::~Sparse, Sparse::operator=): Likewise.
* SparseCmplxQR.h (SparseCmplxQR::~SparseCmplxQR, SparseCmplxQR::operator=):
Likewise.
* SparseQR.h (SparseQR::~SparseQR, SparseQR::operator=): Likewise.
* sparse-base-chol.h (sparse_base_chol::~sparse_base_chol,
sparse_base_chol::operator): Likewise.
* dim-vector.h (oct-refcount.h): New included header.
(dim_vector::make_unique, dim_vector::resize): Use OCTREFCOUNT_ATOMIC_DECREMENT
macro and delete rep when refcount reaches 0.
(dim_vector::dim_vector): Use OCTREFCOUNT_ATOMIC_INCREMENT.
(dim_vector::operator=): Use OCTREFCOUNT_ATOMIC_INCREMENT and
OCTREFCOUNT_ATOMIC_DECREMENT.
(dim_vector::~dim_vector): Use OCTREFCOUNT_ATOMIC_DECREMENT.
* oct-mutex.h (oct-refcount.h): New included header.
(octave_base_mutex::count): Use octave_refcount class.
* gl-render.cc (oct-refcount.h): New included header.
* graphics.h.in (oct-refcount.h): Likewise.
(base_property::count, base_graphics_toolkit::count,
base_graphics_object::count, base_graphics_event::count): Use octave_refcount.
(property::~property, property::operator=): Delete rep only when refcountn is
excatly 0.
* oct-map.h (octave_fields::make_unique): Delete rep when refcount reaches 0.
* oct-stream.h (oct-refcount.h): New included header.
(octave_base_stream::count): Use octave_refcount class.
* ov.h (octave_value::make_unique): Delete rep when refcount reaches 0.
* symtab.h (oct-refcount.h): New included header.
(symbol_record_rep::count, fcn_info_rep::count): Use octave_refcount class.
* DLD-FUNCTIONS/urlwrite.cc (oct-refcount.h): New included header.
(curl_handle_rep::count): Use octave_refcount class.
author | Michael Goffioul <michael.goffioul@gmail.com> |
---|---|
date | Sat, 03 Dec 2011 15:19:42 +0000 |
parents | 834f904a3dcb |
children | 72c96de7a403 |
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/* Copyright (C) 2008-2011 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_octave_mutex_h) #define octave_octave_mutex_h 1 #include "oct-refcount.h" class octave_mutex; class octave_base_mutex { public: friend class octave_mutex; octave_base_mutex (void) : count (1) { } virtual ~octave_base_mutex (void) { } virtual void lock (void); virtual void unlock (void); virtual bool try_lock (void); private: octave_refcount<int> count; }; class OCTAVE_API octave_mutex { public: octave_mutex (void); octave_mutex (const octave_mutex& m) : rep (m.rep) { rep->count++; } ~octave_mutex (void) { if (--rep->count == 0) delete rep; } octave_mutex& operator = (const octave_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: octave_base_mutex *rep; }; class octave_autolock { public: octave_autolock (const octave_mutex& m, bool block = true) : mutex (m), lock_result (false) { if (block) { mutex.lock (); lock_result = true; } else lock_result = mutex.try_lock (); } ~octave_autolock (void) { if (lock_result) mutex.unlock (); } bool ok (void) const { return lock_result; } operator bool (void) const { return ok (); } private: // No copying or default constructor! octave_autolock (void); octave_autolock (const octave_autolock&); octave_autolock& operator = (const octave_autolock&); private: octave_mutex mutex; bool lock_result; }; class OCTAVE_API octave_thread { public: static void init (void); static bool is_octave_thread (void); }; #endif