cudaError_t cudaEventQuery ( cudaEvent_t  event  ) 

Query the status of all device work preceding the most recent call to cudaEventRecord() (in the appropriate compute streams, as specified by the arguments to cudaEventRecord()).

If this work has successfully been completed by the device, or if cudaEventRecord() has not been called on event, then cudaSuccess is returned. If this work has not yet been completed by the device then cudaErrorNotReady is returned.

event - Event to query
cudaSuccess, cudaErrorNotReady, cudaErrorInitializationError, cudaErrorInvalidValue, cudaErrorInvalidResourceHandle, cudaErrorLaunchFailure
Note that this function may also return error codes from previous, asynchronous launches.
See also:
cudaEventCreate (C API), cudaEventCreateWithFlags, cudaEventRecord, cudaEventSynchronize, cudaEventDestroy, cudaEventElapsedTime

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