OS_SetCallBack (changes)

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OS SWI Calls

» OS_SetCallBack

OS_SetCallBack

(SWI &1B)

Use

The purpose of this call is to cause a call to the CallBack handler.

Notes

This sets the CallBack flag and so causes entry to the CallBack handler when the system next exits to user mode code with interrupts enabled (apart, of course, from the exit from this SWI).

This SWI may be used if the code linked into the system (via vector or as a SWI handler, etc) is required to do things on exit from the system. The callback handler is set with OS_ChangeEnvironment , and is distinct from transient the “transient” CallBacks set withOS_AddCallBack.

See also

• CallBack Handler
• OS_AddCallBack
• OS_ChangeEnvironment