Dispatch functions

The OS provides a set of dispatch_* functions that:

• allow a common blocking point for managers and clients that need to support multiple message types (e.g., a resource manager could handle its own private message range).
• provide a flexible interface for message types that isn't tied to the resource manager (for clean handling of private messages and pulse codes)
• decouple the blocking and handler code from threads. You can implement the resource manager event loop in your main code. This decoupling also makes for easier debugging, because you can put a breakpoint between the block function and the handler function.

For more information, see the Resource Managers chapter of Getting Started with the QNX OS, and the Writing a Resource Manager guide.