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Ulm's Oberon Library:
SysInterrupts
NAME
SysInterrupts - interrupt nest level of coroutines
SYNOPSIS
VAR interrupts: INTEGER; (* current sum of all coroutines *)
PROCEDURE GetNumberOfInterrupts(cr: Coroutines.Coroutine) : INTEGER;
PROCEDURE IncNumberOfInterrupts(cr: Coroutines.Coroutine);
PROCEDURE DecNumberOfInterrupts(cr: Coroutines.Coroutine);
DESCRIPTION
SysInterrupts
maintains the per-coroutine interrupt nest level.
Interrupts are asynchronous events of SysSignals.
This information is primarily needed by copying
garbage collectors to check whether a coroutine is in
a traceable state or not.
GetNumberOfInterrupts
returns the current nest level of interrupts of cr.
The sum of all nest levels of all currently active
coroutines is maintained in interrupts.
IncNumberOfInterrupts and
DecNumberOfInterrupts allow to modify the
interrupt nest level information of cr.
Note that the nest level is usually maintained by
the runtime system.
SEE ALSO
- Coroutines
-
interface to coroutines
- SysSignals
-
asynchronous events
- SysStorage
-
garbage collector
Edited by: borchert, last change: 1995/03/13, revision: 1.1, converted to HTML: 1997/04/28
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