Managing Event Sets (H5ES)

H5ES_CLOSE	H5ES_GET_ERR_STATUS	H5ES_GET_OP_COUNTER
H5ES_CREATE	H5ES_GET_ERR_COUNT	H5ES_WAIT
H5ES_GET_COUNT	H5ES_GET_ERR_INFO

This interface can be only used with the HDF5 VOL connectors that enable the asynchronous feature in HDF5. The native HDF5 library has only synchronous operations.

HDF5 VOL connectors with support for asynchronous operations:

• ASYNC
• DAOS

Example:

 fid = H5Fopen(..); 
 gid = H5Gopen(fid, ..);  //Starts when H5Fopen completes
 did = H5Dopen(gid, ..);  //Starts when H5Gopen completes

 es_id = H5EScreate();  // Create event set for tracking async operations 
 status = H5Dwrite_async(did, .., es_id);  //Asynchronous, starts when H5Dopen completes, 
                                           // may run concurrently with other H5Dwrite_async 
                                           // in event set.
 status = H5Dwrite_async(did, .., es_id); //Asynchronous, starts when H5Dopen completes, 
                                          // may run concurrently with other H5Dwrite_async 
                                          // in event set....
 <other user code>
 ...
 H5ESwait(es_id); //Wait for operations in event set to complete, buffers used for H5Dwrite_async must only be changed after wait returns.