#ifndef _NTLDR_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)

/**
 * The LdrFastFailInLoaderCallout routine forcefully terminates the calling program if it is invoked inside a loader callout. Otherwise, it has no effect.
 *
 * \remarks This routine does not catch all potential deadlock cases; it is possible for a thread inside a loader callout
 * to acquire a lock while some thread outside a loader callout holds the same lock and makes a call into the loader.
 * In other words, there can be a lock order inversion between the loader lock and a client lock.
 * https://learn.microsoft.com/en-us/windows/win32/devnotes/ldrfastfailinloadercallout
 */
NTSYSAPI
VOID
NTAPI
LdrFastFailInLoaderCallout(
    VOID
    );

#endif
#endif
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VOID NTAPI LdrFastFailInLoaderCallout(void);
View the official Win32 development documentation

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Win32 development documentation (ldrfastfailinloadercallout)

LdrFastFailInLoaderCallout function

[Some information relates to pre-released product which may be substantially modified before it's commercially released. Microsoft makes no warranties, express or implied, with respect to the information provided here.]

This function forcefully terminates the calling program if it is invoked inside a loader callout. Otherwise, it has no effect.

Parameters

This function has no parameters.

Return value

This function does not return a value.

Remarks

This routine does not catch all potential deadlock cases; it is possible for a thread inside a loader callout to acquire a lock while some thread outside a loader callout holds the same lock and makes a call into the loader. In other words, there can be a lock order inversion between the loader lock and a client lock.

Requirements

Requirement	Value
Library	NTDll.lib
DLL	NTDll.dll

View the official Win32 development documentation

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