IHostMAlloc::Alloc Method

  • Article

Requests that the host allocate the specified amount of memory from the heap.

Syntax

HRESULT Alloc (  
    [in] SIZE_T  cbSize,
    [in] EMemoryCriticalLevel dwCriticalLevel,
    [out] void** ppMem  
);

Parameters

cbSize
[in] The size, in bytes, of the current memory allocation request.

dwCriticalLevel
[in] One of the EMemoryCriticalLevel values, indicating the impact of an allocation failure.

ppMem
[out] A pointer to the allocated memory, or null if the request could not be completed.

Return Value

HRESULT Description
S_OK Alloc returned successfully.
HOST_E_CLRNOTAVAILABLE The common language runtime (CLR) has not been loaded into a process, or the CLR is in a state in which it cannot run managed code or process the call successfully.
HOST_E_TIMEOUT The call timed out.
HOST_E_NOT_OWNER The caller does not own the lock.
HOST_E_ABANDONED An event was canceled while a blocked thread or fiber was waiting on it.
E_FAIL An unknown catastrophic failure occurred. When a method returns E_FAIL, the CLR is no longer usable within the process. Subsequent calls to hosting methods return HOST_E_CLRNOTAVAILABLE.
E_OUTOFMEMORY Not enough memory was available to complete the allocation request.

Remarks

The CLR gets an interface pointer to an IHostMalloc instance by calling the IHostMemoryManager::CreateMalloc method.

Requirements

Platforms: See System Requirements.

Header: MSCorEE.h

Library: Included as a resource in MSCorEE.dll

.NET Framework Versions: Available since 2.0

See also