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Viewing changes to src/VBox/Runtime/r0drv/darwin/threadpreempt-r0drv-darwin.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Felix Geyer
  • Date: 2011-07-04 13:02:31 UTC
  • mfrom: (3.1.1 sid)
  • Revision ID: james.westby@ubuntu.com-20110704130231-l843es6wqhx614n7
Tags: 4.0.10-dfsg-1ubuntu1
* Merge from Debian unstable, remaining changes:
  - Add Apport hook.
    - debian/virtualbox-ose.files/source_virtualbox-ose.py
    - debian/virtualbox-ose.install
  - Drop *-source packages.
* Add the Modaliases control field manually for maximum backportability.

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src/VBox/Runtime/r0drv/darwin/threadpreempt-r0drv-darwin.cpp
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RTDECL(bool) RTThreadPreemptIsPending(RTTHREAD hThread)
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{
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    Assert(hThread == NIL_RTTHREAD);
 
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    if (!g_pfnR0DarwinAstPending)
 
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        return false;
 
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    uint32_t volatile *pfAstPending = g_pfnR0DarwinAstPending(); AssertPtr(pfAstPending);
 
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    uint32_t  const    fAstPending = *pfAstPending;
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    /* HACK ALERT! This ASSUMES that the cpu_pending_ast member of cpu_data_t doesn't move. */
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    uint32_t ast_pending;
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#if defined(RT_ARCH_X86) || defined(RT_ARCH_AMD64)
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    __asm__ volatile("movl %%gs:%P1,%0\n\t"
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                     : "=r" (ast_pending)
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                     : "i"  (__builtin_offsetof(struct my_cpu_data_x86, cpu_pending_ast)) );
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#else
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# error "Port me"
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#endif
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    AssertMsg(!(ast_pending & UINT32_C(0xfffff000)),("%#x\n", ast_pending));
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    return (ast_pending & (AST_PREEMPT | AST_URGENT)) != 0;
 
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    AssertMsg(!(fAstPending & UINT32_C(0xfffff000)), ("%#x\n", fAstPending));
 
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    return (fAstPending & (AST_PREEMPT | AST_URGENT)) != 0;
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}
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RTDECL(bool) RTThreadPreemptIsPendingTrusty(void)
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{
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    /* yes, we think that RTThreadPreemptIsPending is reliable... */
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    return true;
 
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    return g_pfnR0DarwinAstPending != NULL;
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}
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