e42d5ffe29
Rather than using the compiler specific `__thread` mechanism for TLS, use the C++11 standard `thread_local` keyword. This removes the check for the `__thread` keyword and the `PALUDIS_TLS` macro in the single usage site. Take advantage of the fact that `thread_local` can be applied to non-POD types to avoid the heap allocation of the context buffer and letting the loader perform the allocation. This has a slight penalty (an extra function call) on thread construction. However, given that the heap allocation would likely be performed, this will be largely offset by the loss of the allocation.
67 lines
1.7 KiB
C++
67 lines
1.7 KiB
C++
/* vim: set sw=4 sts=4 et foldmethod=syntax : */
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/*
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* Copyright (c) 2005, 2006, 2007, 2008 Ciaran McCreesh
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*
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* This file is part of the Paludis package manager. Paludis is free software;
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* you can redistribute it and/or modify it under the terms of the GNU General
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* Public License version 2, as published by the Free Software Foundation.
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*
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* Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef PALUDIS_GUARD_PALUDIS_ATTRIBUTES_HH
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#define PALUDIS_GUARD_PALUDIS_ATTRIBUTES_HH 1
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/** \file
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* Declare the PALUDIS_ATTRIBUTE macros.
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*
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* \ingroup g_utils
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*
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* \section Examples
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*
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* - None at this time.
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*/
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/** \def PALUDIS_ATTRIBUTE
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* If we're using a GNU compatible compiler, expands to __attribute__, otherwise
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* discards its arguments.
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*
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* \ingroup g_utils
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*/
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/** \def PALUDIS_VISIBLE
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* Marker used to represent 'make visible', if visibility is enabled.
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*
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* \ingroup g_utils
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*/
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/** \def PALUDIS_HIDDEN
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* Marker used to represent 'make hidden', if visibility is enabled.
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*
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* \ingroup g_utils
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*/
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#if defined(DOXYGEN)
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# define PALUDIS_ATTRIBUTE(x)
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#else
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# define PALUDIS_ATTRIBUTE(x) __attribute__(x)
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#endif
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#if defined(DOXYGEN)
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# define PALUDIS_VISIBLE
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# define PALUDIS_HIDDEN
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#else
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# define PALUDIS_VISIBLE PALUDIS_ATTRIBUTE((visibility("default")))
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# define PALUDIS_HIDDEN PALUDIS_ATTRIBUTE((visibility("hidden")))
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#endif
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#endif
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