Function cudaIpcGetEventHandle

pub unsafe extern "C" fn cudaIpcGetEventHandle(
    handle: *mut cudaIpcEventHandle_t,
    event: cudaEvent_t,
) -> cudaError_t

\brief Gets an interprocess handle for a previously allocated event

Takes as input a previously allocated event. This event must have been created with the ::cudaEventInterprocess and ::cudaEventDisableTiming flags set. This opaque handle may be copied into other processes and opened with ::cudaIpcOpenEventHandle to allow efficient hardware synchronization between GPU work in different processes.

After the event has been been opened in the importing process, ::cudaEventRecord, ::cudaEventSynchronize, ::cudaStreamWaitEvent and ::cudaEventQuery may be used in either process. Performing operations on the imported event after the exported event has been freed with ::cudaEventDestroy will result in undefined behavior.

IPC functionality is restricted to devices with support for unified addressing on Linux and Windows operating systems. IPC functionality on Windows is supported for compatibility purposes but not recommended as it comes with performance cost. Users can test their device for IPC functionality by calling ::cudaDeviceGetAttribute with ::cudaDevAttrIpcEventSupport

\param handle - Pointer to a user allocated cudaIpcEventHandle in which to return the opaque event handle \param event - Event allocated with ::cudaEventInterprocess and ::cudaEventDisableTiming flags.

\return ::cudaSuccess, ::cudaErrorInvalidResourceHandle, ::cudaErrorMemoryAllocation, ::cudaErrorMapBufferObjectFailed, ::cudaErrorNotSupported, ::cudaErrorInvalidValue \note_init_rt \note_callback

\sa ::cudaEventCreate, ::cudaEventDestroy, ::cudaEventSynchronize, ::cudaEventQuery, ::cudaStreamWaitEvent, ::cudaIpcOpenEventHandle, ::cudaIpcGetMemHandle, ::cudaIpcOpenMemHandle, ::cudaIpcCloseMemHandle, ::cuIpcGetEventHandle