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Open Client Client-Library/C Reference Manual

Chapter 2 Topics

Asynchronous programming

The CS_BUSY return code

The CS_BUSY return code

Any Client-Library routine that takes a command or connection structure as a parameter returns CS_BUSY. CS_BUSY indicates that a routine cannot perform because the relevant connection is currently busy, waiting for an asynchronous operation to complete.

An application calls the following routines while an asynchronous operation is pending:

• Any routine that takes a CS_CONTEXT structure as a parameter. If the CS_CONTEXT structure is an optional parameter, it must be non-NULL.

• ct_cancel(CS_CANCEL_ATTN)

• ct_cmd_props(CS_USERDATA)

• ct_con_props(CS_USERDATA)

• ct_poll