Frees previously created pool.
Pushes an operation to be processed. opdata is passed to the function
provided in e_operation_pool_new().
user data for the operation
Releases opid previously reserved by e_operation_pool_reserve_opid().
an operation ID
Reserves new operation ID, which is returned. This operation ID may be released by e_operation_pool_release_opid() when the operation is finished.
Contains only private data that should be read and manipulated using the functions below.