IHostMAlloc::Alloc Method

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

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.

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.

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

Platforms: See .NET Framework System Requirements.

Header: MSCorEE.idl

Library: Included as a resource in MSCorEE.dll

.NET Framework Versions: 3.5 SP1, 3.5, 3.0 SP1, 3.0, 2.0 SP1, 2.0