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Copies count bytes from the memory area pointed to by offset bytes from the start of symbol symbol to the memory area pointed to by dst . The memory areas may not overlap. symbol is a variable that resides in global or constant memory space. kind can be either cudaMemcpyDeviceToHost or cudaMemcpyDeviceToDevice.
cudaMemcpyFromSymbolAsync() is asynchronous with respect to the host, so the call may return before the copy is complete. The copy can optionally be associated to a stream by passing a non-zero stream argument. If kind is cudaMemcpyDeviceToHost and stream is non-zero, the copy may overlap with operations in other streams.
- Parameters:
-
| dst | - Destination memory address |
| symbol | - Symbol source from device |
| count | - Size in bytes to copy |
| offset | - Offset from start of symbol in bytes |
| kind | - Type of transfer |
| stream | - Stream identifier |
- Returns:
- cudaSuccess, cudaErrorInvalidValue, cudaErrorInvalidSymbol, cudaErrorInvalidDevicePointer, cudaErrorInvalidMemcpyDirection
- Note:
- The
symbol paramater may also be a character string, naming a variable that resides in global or constant memory space, however this usage is deprecated as of CUDA 4.1.
Note that this function may also return error codes from previous, asynchronous launches.
This function exhibits asynchronous behavior for most use cases.
- See also:
- cudaMemcpy, cudaMemcpy2D, cudaMemcpyToArray, cudaMemcpy2DToArray, cudaMemcpyFromArray, cudaMemcpy2DFromArray, cudaMemcpyArrayToArray, cudaMemcpy2DArrayToArray, cudaMemcpyToSymbol, cudaMemcpyFromSymbol, cudaMemcpyAsync, cudaMemcpy2DAsync, cudaMemcpyToArrayAsync, cudaMemcpy2DToArrayAsync, cudaMemcpyFromArrayAsync, cudaMemcpy2DFromArrayAsync, cudaMemcpyToSymbolAsync
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