pub unsafe extern "C" fn cudaFree(devPtr: *mut c_void) -> cudaError_tExpand description
\brief Frees memory on the device
Frees the memory space pointed to by \p devPtr, which must have been returned by a previous call to one of the following memory allocation APIs - ::cudaMalloc(), ::cudaMallocPitch(), ::cudaMallocManaged(), ::cudaMallocAsync(), ::cudaMallocFromPoolAsync().
Note - This API will not perform any implicit synchronization when the pointer was allocated with ::cudaMallocAsync or ::cudaMallocFromPoolAsync. Callers must ensure that all accesses to these pointer have completed before invoking ::cudaFree. For best performance and memory reuse, users should use ::cudaFreeAsync to free memory allocated via the stream ordered memory allocator. For all other pointers, this API may perform implicit synchronization.
If ::cudaFree(\p devPtr) has already been called before, an error is returned. If \p devPtr is 0, no operation is performed. ::cudaFree() returns ::cudaErrorValue in case of failure.
The device version of ::cudaFree cannot be used with a \p *devPtr allocated using the host API, and vice versa.
\param devPtr - Device pointer to memory to free
\return ::cudaSuccess, ::cudaErrorInvalidValue \notefnerr \note_init_rt \note_callback
\sa ::cudaMalloc, ::cudaMallocPitch, ::cudaMallocManaged, ::cudaMallocArray, ::cudaFreeArray, ::cudaMallocAsync, ::cudaMallocFromPoolAsync \ref ::cudaMallocHost(void**, size_t) “cudaMallocHost (C API)”, ::cudaFreeHost, ::cudaMalloc3D, ::cudaMalloc3DArray, ::cudaFreeAsync ::cudaHostAlloc, ::cuMemFree