82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
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/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file atomicAdjust.h
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* @author drose
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* @date 2002-08-09
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*/
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#ifndef ATOMICADJUST_H
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#define ATOMICADJUST_H
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#include "dtoolbase.h"
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#include "selectThreadImpl.h"
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#if defined(CPPPARSER)
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struct AtomicAdjust {
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typedef long Integer;
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typedef void *UnalignedPointer;
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typedef UnalignedPointer Pointer;
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};
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#elif defined(THREAD_DUMMY_IMPL) || defined(THREAD_SIMPLE_IMPL)
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#include "atomicAdjustDummyImpl.h"
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typedef AtomicAdjustDummyImpl AtomicAdjust;
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#elif (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))) || (defined(__clang__) && (__clang_major__ >= 3))
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// GCC 4.7 and above has built-in __atomic functions for atomic operations.
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// Clang 3.0 and above also supports them.
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#include "atomicAdjustGccImpl.h"
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typedef AtomicAdjustGccImpl AtomicAdjust;
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#if (__GCC_ATOMIC_INT_LOCK_FREE + __GCC_ATOMIC_LONG_LOCK_FREE) > 0
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#define HAVE_ATOMIC_COMPARE_AND_EXCHANGE 1
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#endif
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#if __GCC_ATOMIC_POINTER_LOCK_FREE > 0
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#define HAVE_ATOMIC_COMPARE_AND_EXCHANGE_PTR 1
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#endif
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#elif (defined(__i386__) || defined(_M_IX86)) && !defined(__APPLE__)
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// For an i386 architecture, we'll always use the i386 implementation. It
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// should be safe for any OS, and it might be a bit faster than any OS-
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// provided calls.
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#include "atomicAdjustI386Impl.h"
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typedef AtomicAdjustI386Impl AtomicAdjust;
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// These symbols are defined if the compare_and_exchange() methods are
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// implemented natively, without recourse to external locks. If these are not
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// defined, users may elect to implement an operation with some other method
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// than compare_and_exchange(), which might be faster.
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#define HAVE_ATOMIC_COMPARE_AND_EXCHANGE 1
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#define HAVE_ATOMIC_COMPARE_AND_EXCHANGE_PTR 1
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#elif defined(THREAD_WIN32_IMPL)
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#include "atomicAdjustWin32Impl.h"
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typedef AtomicAdjustWin32Impl AtomicAdjust;
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#define HAVE_ATOMIC_COMPARE_AND_EXCHANGE 1
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#define HAVE_ATOMIC_COMPARE_AND_EXCHANGE_PTR 1
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#elif defined(THREAD_LINUX_IMPL)
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#error Linux native threads are currently implemented only for i386; use Posix threads instead.
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#elif defined(THREAD_POSIX_IMPL)
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#include "atomicAdjustPosixImpl.h"
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typedef AtomicAdjustPosixImpl AtomicAdjust;
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#endif
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#endif
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