cudaError_t cudaMemcpyFromArrayAsync ( void *  dst,
const struct cudaArray *  src,
size_t  wOffset,
size_t  hOffset,
size_t  count,
enum cudaMemcpyKind  kind,
cudaStream_t  stream = 0 

Copies count bytes from the CUDA array src starting at the upper left corner (wOffset, hOffset) to the memory area pointed to by dst, where kind is one of cudaMemcpyHostToHost, cudaMemcpyHostToDevice, cudaMemcpyDeviceToHost, or cudaMemcpyDeviceToDevice, and specifies the direction of the copy.

cudaMemcpyFromArrayAsync() is asynchronous with respect to the host, so the call may return before the copy is complete. It only works on page-locked host memory and returns an error if a pointer to pageable memory is passed as input. The copy can optionally be associated to a stream by passing a non-zero stream argument. If kind is cudaMemcpyHostToDevice or cudaMemcpyDeviceToHost and stream is non-zero, the copy may overlap with operations in other streams.

dst - Destination memory address
src - Source memory address
wOffset - Source starting X offset
hOffset - Source starting Y offset
count - Size in bytes to copy
kind - Type of transfer
stream - Stream identifier
cudaSuccess, cudaErrorInvalidValue, cudaErrorInvalidDevicePointer, cudaErrorInvalidMemcpyDirection
Note that this function may also return error codes from previous, asynchronous launches.
See also:
cudaMemcpy, cudaMemcpy2D, cudaMemcpyToArray, cudaMemcpy2DToArray, cudaMemcpyFromArray, cudaMemcpy2DFromArray, cudaMemcpyArrayToArray, cudaMemcpy2DArrayToArray, cudaMemcpyToSymbol, cudaMemcpyFromSymbol, cudaMemcpyAsync, cudaMemcpy2DAsync, cudaMemcpyToArrayAsync, cudaMemcpy2DToArrayAsync, cudaMemcpy2DFromArrayAsync, cudaMemcpyToSymbolAsync, cudaMemcpyFromSymbolAsync

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