I need to supply mission critical data from the callback function that is called when data is requested. To prepare data takes time so this operation cannot be done inside the callback itself. So I use circular buffer. Currently, circular buffer function that process data into the buffer is called from inside the notification routine invoked using SysNotifyBroadcastDeferred API. Unfortunately, the notification routine is not invoked when user is doing intensive UI operation so buffer becomes empty. What could be a solution to this problem? I though if I could handle hardware timer interrupt I could fill in buffer from timer interrupt service routine. But I don't know how to register and handle hardware interrupts on Palm OS 5.
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