Function cuMemUnmap

pub unsafe extern "C" fn cuMemUnmap(
    ptr: CUdeviceptr,
    size: usize,
) -> CUresult

\brief Unmap the backing memory of a given address range.

The range must be the entire contiguous address range that was mapped to. In other words, ::cuMemUnmap cannot unmap a sub-range of an address range mapped by ::cuMemCreate / ::cuMemMap. Any backing memory allocations will be freed if there are no existing mappings and there are no unreleased memory handles.

When ::cuMemUnmap returns successfully the address range is converted to an address reservation and can be used for a future calls to ::cuMemMap. Any new mapping to this virtual address will need to have access granted through ::cuMemSetAccess, as all mappings start with no accessibility setup.

\param[in] ptr - Starting address for the virtual address range to unmap \param[in] size - Size of the virtual address range to unmap \returns ::CUDA_SUCCESS, ::CUDA_ERROR_INVALID_VALUE, ::CUDA_ERROR_NOT_INITIALIZED, ::CUDA_ERROR_DEINITIALIZED, ::CUDA_ERROR_NOT_PERMITTED, ::CUDA_ERROR_NOT_SUPPORTED \notefnerr \note_sync

\sa ::cuMemCreate, ::cuMemAddressReserve