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67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
// Copyright (C) 2001
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// Mac Murrett
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//
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// Permission to use, copy, modify, distribute and sell this software
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// and its documentation for any purpose is hereby granted without fee,
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// provided that the above copyright notice appear in all copies and
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// that both that copyright notice and this permission notice appear
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// in supporting documentation. Mac Murrett makes no representations
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// about the suitability of this software for any purpose. It is
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// provided "as is" without express or implied warranty.
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//
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// See http://www.boost.org for most recent version including documentation.
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#include <Debugging.h>
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#include <Multiprocessing.h>
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#include "execution_context.hpp"
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#include "init.hpp"
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namespace boost {
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namespace threads {
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namespace mac {
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execution_context_t execution_context()
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{
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// make sure that MP services are available the first time through
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static bool bIgnored = detail::thread_init();
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// first check if we're an MP task
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if(MPTaskIsPreemptive(kInvalidID))
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{
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return(k_eExecutionContextMPTask);
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}
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#if TARGET_CARBON
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// Carbon has TaskLevel
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UInt32 ulLevel = TaskLevel();
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if(ulLevel == 0UL)
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{
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return(k_eExecutionContextSystemTask);
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}
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if(ulLevel & kInDeferredTaskMask)
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{
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return(k_eExecutionContextDeferredTask);
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}
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return(k_eExecutionContextOther);
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#else
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// this can be implemented using TaskLevel if you don't mind linking against
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// DebugLib (and therefore breaking Mac OS 8.6 support), or CurrentExecutionLevel.
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# error execution_context unimplimented
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#endif
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}
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} // namespace mac
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} // namespace threads
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} // namespace boost
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