41 lines
1.0 KiB
C++
41 lines
1.0 KiB
C++
/*
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* \brief Helper functions UTCB access on Codezero
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* \author Norman Feske
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* \date 2012-03-01
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*/
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/*
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* Copyright (C) 2012-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* Genode includes */
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#include <base/thread.h>
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/**
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* Resolve 'Thread_base::myself' when not linking the thread library
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*
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* This weak symbol is primarily used by test cases. Most other Genode programs
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* use the thread library. If the thread library is not used, 'myself' can only
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* be called by the main thread, for which 'myself' is defined as zero.
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*/
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Genode::Thread_base * __attribute__((weak)) Genode::Thread_base::myself() { return 0; }
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Genode::Native_utcb *Genode::Thread_base::utcb()
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{
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/*
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* If 'utcb' is called on the object returned by 'myself',
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* the 'this' pointer may be NULL (if the calling thread is
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* the main thread). Therefore we handle this special case
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* here.
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*/
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if (this == 0) return 0;
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return &_context->utcb;
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}
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