IOWorkLoop class
E771035
The IOWorkLoop class is a core I/O Kit synchronization and event-handling mechanism in macOS that serializes work for kernel drivers using command gates and interrupt/event sources.
All labels observed (1)
| Label | Occurrences |
|---|---|
| IOWorkLoop class canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9002776 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: IOWorkLoop class Context triple: [I/O Kit, includes, IOWorkLoop class]
-
A.
IOCompletionCallback
IOCompletionCallback is a .NET delegate type used to define callback methods that the thread pool invokes when asynchronous I/O operations complete.
-
B.
State Loop
State Loop is a type of short, state-maintained highway that typically connects major routes or provides a bypass around urban areas within a U.S. state highway system.
-
C.
WorkerGlobalScope
WorkerGlobalScope is the global execution context for Web Workers, providing the environment and APIs that worker scripts use to run independently of the main browser thread.
-
D.
ManualResetEvent
ManualResetEvent is a .NET synchronization primitive that allows threads to wait until a signal is set and remains signaled until it is manually reset.
-
E.
EventWaitHandle
EventWaitHandle is a .NET synchronization primitive that allows threads or processes to signal and wait for events, coordinating execution flow in concurrent applications.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: IOWorkLoop class Target entity description: The IOWorkLoop class is a core I/O Kit synchronization and event-handling mechanism in macOS that serializes work for kernel drivers using command gates and interrupt/event sources.
-
A.
IOCompletionCallback
IOCompletionCallback is a .NET delegate type used to define callback methods that the thread pool invokes when asynchronous I/O operations complete.
-
B.
State Loop
State Loop is a type of short, state-maintained highway that typically connects major routes or provides a bypass around urban areas within a U.S. state highway system.
-
C.
WorkerGlobalScope
WorkerGlobalScope is the global execution context for Web Workers, providing the environment and APIs that worker scripts use to run independently of the main browser thread.
-
D.
ManualResetEvent
ManualResetEvent is a .NET synchronization primitive that allows threads to wait until a signal is set and remains signaled until it is manually reset.
-
E.
EventWaitHandle
EventWaitHandle is a .NET synchronization primitive that allows threads or processes to signal and wait for events, coordinating execution flow in concurrent applications.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
C++ class
ⓘ
I/O Kit event-handling mechanism ⓘ I/O Kit synchronization primitive ⓘ |
| benefit |
reduces race conditions in driver code
ⓘ
simplifies driver synchronization design ⓘ |
| concurrencyControl | prevents concurrent execution of event source actions on same work loop ⓘ |
| creationMethod | IOWorkLoop::workLoop() NERFINISHED ⓘ |
| designGoal |
avoid explicit locking in most driver code paths
ⓘ
provide safe context for executing driver callbacks ⓘ |
| documentation | Apple Developer Documentation for I/O Kit NERFINISHED ⓘ |
| ensures |
ordered execution of work items
ⓘ
serialized access to driver state ⓘ |
| handles |
command-gate-enqueued function calls
ⓘ
interrupt-driven events ⓘ timer-driven events ⓘ |
| language | C++ ⓘ |
| layer | kernel space ⓘ |
| lifecycle | created and owned by an IOService subclass ⓘ |
| namespace | Kernel I/O Kit NERFINISHED ⓘ |
| operatingSystem | macOS ⓘ |
| partOf | IOKit framework NERFINISHED ⓘ |
| platform | Darwin kernel NERFINISHED ⓘ |
| primaryRole |
provide event-handling context for drivers
ⓘ
serialize work for kernel drivers ⓘ |
| provides |
execution context for IOEventSource objects
ⓘ
mutual exclusion for driver critical sections ⓘ |
| relatedTo |
IOCommandGate
NERFINISHED
ⓘ
IOEventSource NERFINISHED ⓘ IOInterruptEventSource NERFINISHED ⓘ IOService NERFINISHED ⓘ IOTimerEventSource NERFINISHED ⓘ |
| schedulingGranularity | event source callbacks ⓘ |
| synchronizationModel | single-threaded work loop context ⓘ |
| synchronizationType | cooperative serialization via work loop thread ⓘ |
| synchronizesWith |
IOCommandGate
NERFINISHED
ⓘ
IOEventSource NERFINISHED ⓘ IOInterruptEventSource NERFINISHED ⓘ IOTimerEventSource NERFINISHED ⓘ |
| threadingModel | dedicated kernel thread or shared thread pool ⓘ |
| usedBy |
kernel device drivers
ⓘ
kernel extensions ⓘ |
| usedFor |
deferring interrupt work to thread context
ⓘ
handling hardware interrupts in a serialized context ⓘ scheduling timed callbacks via timer event sources ⓘ synchronizing access to hardware registers ⓘ synchronizing access to shared driver data structures ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: IOWorkLoop class Description of subject: The IOWorkLoop class is a core I/O Kit synchronization and event-handling mechanism in macOS that serializes work for kernel drivers using command gates and interrupt/event sources.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.