05/13: [NTOSKRNL] Implement ExGetRunRefForCurrentProcessor() to get runref for a proc

[Pierre Schweitzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=010b9b5469377fbddf2d6…

commit 010b9b5469377fbddf2d632de9a3945d7e522643
Author:     Pierre Schweitzer <pierre(a)reactos.org>
AuthorDate: Sat Nov 17 15:32:10 2018 +0100
Commit:     Pierre Schweitzer <pierre(a)reactos.org>
CommitDate: Sat Nov 17 16:44:35 2018 +0100

    [NTOSKRNL] Implement ExGetRunRefForCurrentProcessor() to get runref for a proc
---
 ntoskrnl/include/internal/ex.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/ntoskrnl/include/internal/ex.h b/ntoskrnl/include/internal/ex.h
index a8e715aadd..e09eb9ba05 100644
--- a/ntoskrnl/include/internal/ex.h
+++ b/ntoskrnl/include/internal/ex.h
@@ -545,6 +545,15 @@ ExGetCountFastReference(IN EX_FAST_REF FastRef)
     return (ULONG)FastRef.RefCnt;
 }
 
+FORCEINLINE
+PEX_RUNDOWN_REF
+ExGetRunRefForCurrentProcessor(IN PEX_RUNDOWN_REF_CACHE_AWARE RunRefCacheAware)
+{
+    return (PEX_RUNDOWN_REF)((ULONG_PTR)RunRefCacheAware->RunRefs +
+                             RunRefCacheAware->RunRefSize *
+                             (KeGetCurrentProcessorNumber() %
RunRefCacheAware->Number));
+}
+
 FORCEINLINE
 VOID
 ExInitializeFastReference(OUT PEX_FAST_REF FastRef,