CoRevokeMallocSpy function (objbase.h)

Revokes a registered IMallocSpy object.

Syntax

HRESULT CoRevokeMallocSpy();

Return value

This function can return the following values.

Return code	Description
S_OK	The object was revoked successfully.
CO_E_OBJNOTREG	No spy is currently registered.
E_ACCESSDENIED	A spy is registered but there are outstanding allocations (not yet freed) made while this spy was active.

Remarks

The IMallocSpy object is released when it is revoked. This release corresponds to the call to IUnknown::AddRef in the implementation of the QueryInterface function by the CoRegisterMallocSpy function. The implementation of the IMallocSpy interface should then do any appropriate cleanup.

If the return code is E_ACCESSDENIED, there are still outstanding allocations that were made while the spy was active. In this case, the registered spy cannot be revoked at this time because it may have attached arbitrary headers and/or trailers to these allocations that only the spy knows about. Only the spy's PreFree (or PreRealloc) method knows how to account for these headers and trailers. Before returning E_ACCESSDENIED, CoRevokeMallocSpy notes internally that a revoke is pending. When the outstanding allocations have been freed, the revoke proceeds automatically, releasing the IMallocSpy object. Thus, it is necessary to call CoRevokeMallocSpy only once for each call to CoRegisterMallocSpy, even if E_ACCESSDENIED is returned.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	objbase.h
Library	Ole32.lib
DLL	Ole32.dll

See also

CoRegisterMallocSpy

IMallocSpy