[Local GC] Move operations on CLREventStatic to the EE interface (#10813)

* [Local GC] Move operations on CLREventStatic to the EE and add their functionality to the interface

* Fix a missed case

* Split GetWaitForGCEvent into two smaller interface methods to avoid exposing the event itself on the interface

* Initial implementation for Unix

* Complete unix implementation

* Make it work on Windows

* Remove redudant methods from GCToEEInterface

* Fix the Linux build

* First part of code review feedback: make GCEvent dispatch statically (Windows)

* Second part of code review feedback: make GCEvent dispatch statically (Unix)

* Standardize implementation across Windows/Unix (apparently MSVC is more lenient about constructor names than clang)

* Address code review feedback: Add Create*Event methods back onto GCEvent and remove them from GCToOSInterface

* Address code review feedback: remove a dead define

* Remove a bad comment, remove an unnecessary friend class, fix some formatting issues

* Fix an issue when initializing a GCEvent on Linux (should not be allocating an Impl in the constructor)

* Fix the same issue on Windows (less bad, just leaks memory instead of asserting)

1 files changed, 5 insertions, 3 deletions

diff --git a/src/gc/gcinterface.h b/src/gc/gcinterface.h
index cac2ba7114..4ebb5e15d7 100644
--- a/src/gc/gcinterface.h
+++ b/src/gc/gcinterface.h
@@ -687,9 +687,11 @@ public:
     // background GC as the BGC threads also need to walk LOH.
     virtual void PublishObject(uint8_t* obj) = 0;
 
-    // Gets the event that suspended threads will use to wait for the
-    // end of a GC.
-    virtual CLREventStatic* GetWaitForGCEvent() = 0;
+    // Signals the WaitForGCEvent event, indicating that a GC has completed.
+    virtual void SetWaitForGCEvent() = 0;
+
+    // Resets the state of the WaitForGCEvent back to an unsignalled state.
+    virtual void ResetWaitForGCEvent() = 0;
 
     /*
     ===========================================================================