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Stream Class Reference
[Data Structures]
This class encapsulates a queue of asynchronous calls. More...
#include <cuda.hpp>
Public Member Functions | |
| Stream () | |
| creates a new asynchronous stream | |
| bool | queryIfComplete () const |
| Returns true if the current stream queue is finished. | |
| void | waitForCompletion () |
| Blocks the current CPU thread until all operations in the stream are complete. | |
| void | waitEvent (const Event &event) |
| Makes a compute stream wait on an event. | |
| void | enqueueHostCallback (StreamCallback callback, void *userData) |
| Adds a callback to be called on the host after all currently enqueued items in the stream have completed. | |
| operator bool_type () const | |
| returns true if stream object is not default (!= 0) | |
Static Public Member Functions | |
| static Stream & | Null () |
| return Stream object for default CUDA stream | |
Detailed Description
This class encapsulates a queue of asynchronous calls.
- Note:
- Currently, you may face problems if an operation is enqueued twice with different data. Some functions use the constant GPU memory, and next call may update the memory before the previous one has been finished. But calling different operations asynchronously is safe because each operation has its own constant buffer. Memory copy/upload/download/set operations to the buffers you hold are also safe. :
Definition at line 452 of file cuda.hpp.
Constructor & Destructor Documentation
| Stream | ( | ) |
Member Function Documentation
| void enqueueHostCallback | ( | StreamCallback | callback, |
| void * | userData | ||
| ) |
Adds a callback to be called on the host after all currently enqueued items in the stream have completed.
- Note:
- Callbacks must not make any CUDA API calls. Callbacks must not perform any synchronization that may depend on outstanding device work or other callbacks that are not mandated to run earlier. Callbacks without a mandated order (in independent streams) execute in undefined order and may be serialized.
Definition at line 477 of file cuda_stream.cpp.
| cv::cuda::Stream & Null | ( | ) | [static] |
return Stream object for default CUDA stream
Definition at line 496 of file cuda_stream.cpp.
| operator bool_type | ( | ) | const |
returns true if stream object is not default (!= 0)
Definition at line 508 of file cuda_stream.cpp.
| bool queryIfComplete | ( | ) | const |
Returns true if the current stream queue is finished.
Otherwise, it returns false.
Definition at line 420 of file cuda_stream.cpp.
| void waitEvent | ( | const Event & | event ) |
Makes a compute stream wait on an event.
Definition at line 445 of file cuda_stream.cpp.
| void waitForCompletion | ( | ) |
Blocks the current CPU thread until all operations in the stream are complete.
Definition at line 436 of file cuda_stream.cpp.
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