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ToolTalk User's Guide |
1. Introducing the ToolTalk Service
2. An Overview of the ToolTalk Service
4. Setting Up and Maintaining the ToolTalk Processes
5. Maintaining Application Information
6. Maintaining Files and Objects Referenced in ToolTalk Messages
7. Participating in ToolTalk Sessions
13. Managing Information Storage
Retrieving ToolTalk Error Status
Checking ToolTalk Error Status
Functions with Natural Return Values
Functions with No Natural Return Values
A. Migrating from the Classing Engine to the ToolTalk Types Database
B. A Simple Demonstration of How the ToolTalk Service Works
The ToolTalk service provides a function to notify processes if your tool exits unexpectedly. When you include the tt_message_send_on_exit call, the ToolTalk service queues the message internally until one of two events happen:
Your process calls tt_close.
In this case, the ToolTalk service deletes the message from its queue.
The connection between the ttsession server and your process is broken; for example, the application crashed.
In this case, the ToolTalk service matches the queued message to a pattern and delivers it in the same manner as if your had sent the message normally before exiting.
Your process can also send a normal message on a normal termination by calling tt_message_send before it calls tt_close. In this case, if your process sends its normal termination message but crashes before it calls tt_close, the ToolTalk service will deliver both the normal termination message and the tt_message_send_on_exit message to interested processes.
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