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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
// ===========================================================================
// File: notifyexternals.cpp
//
// ===========================================================================
#include "common.h"
#include "excep.h"
#include "interoputil.h"
#include "comcache.h"
#include "notifyexternals.h"
#include "mdaassistants.h"
// On some platforms, we can detect whether the current thread holds the loader
// lock. It is unsafe to execute managed code when this is the case
BOOL ShouldCheckLoaderLock(BOOL fForMDA /*= TRUE*/)
{
CONTRACTL
{
NOTHROW;
GC_NOTRIGGER;
MODE_ANY;
SO_TOLERANT;
}
CONTRACTL_END;
#ifdef FEATURE_CORESYSTEM
// CoreSystem does not support this.
return FALSE;
#else
// Because of how C++ generates code, we must use default initialization to
// 0 here. Any explicit initialization will result in thread-safety problems.
static BOOL fInited;
static BOOL fShouldCheck;
static BOOL fShouldCheck_ForMDA;
if (VolatileLoad(&fInited) == FALSE)
{
fShouldCheck_ForMDA = FALSE;
fShouldCheck = AuxUlibInitialize(); // may fail
#ifdef MDA_SUPPORTED
if (fShouldCheck)
{
MdaLoaderLock* pProbe = MDA_GET_ASSISTANT(LoaderLock);
if (pProbe)
fShouldCheck_ForMDA = TRUE;
}
#endif // MDA_SUPPORTED
VolatileStore(&fInited, TRUE);
}
return (fForMDA ? fShouldCheck_ForMDA : fShouldCheck);
#endif // FEATURE_CORESYSTEM
}
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