Zebediah Figura : ntoskrnl.exe: Implement ExGetExclusiveWaiterCount().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 631473ffd98f6ba978082374a4aa60cf7cd7d6c0
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=631473ffd98f6ba978082374a4aa60cf7cd7d6c0

Author: Zebediah Figura <z.figura12 at gmail.com>
Date:   Tue Apr  9 23:41:07 2019 -0500

ntoskrnl.exe: Implement ExGetExclusiveWaiterCount().

Signed-off-by: Zebediah Figura <z.figura12 at gmail.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/ntoskrnl.exe/ntoskrnl.exe.spec |  2 +-
 dlls/ntoskrnl.exe/sync.c            | 19 +++++++++++++++++++
 include/ddk/wdm.h                   |  1 +
 3 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
index 2d1c826..bdf2a44 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -146,7 +146,7 @@
 @ stub ExFreeToPagedLookasideList
 @ stub ExGetCurrentProcessorCounts
 @ stub ExGetCurrentProcessorCpuUsage
-@ stub ExGetExclusiveWaiterCount
+@ stdcall ExGetExclusiveWaiterCount(ptr)
 @ stub ExGetPreviousMode
 @ stub ExGetSharedWaiterCount
 @ stdcall ExInitializeNPagedLookasideList(ptr ptr ptr long long long long)
diff --git a/dlls/ntoskrnl.exe/sync.c b/dlls/ntoskrnl.exe/sync.c
index c8cae7d..823ff2b 100644
--- a/dlls/ntoskrnl.exe/sync.c
+++ b/dlls/ntoskrnl.exe/sync.c
@@ -1087,3 +1087,22 @@ void WINAPI ExReleaseResourceLite( ERESOURCE *resource )
 {
     ExReleaseResourceForThreadLite( resource, (ERESOURCE_THREAD)KeGetCurrentThread() );
 }
+
+/***********************************************************************
+ *           ExGetExclusiveWaiterCount   (NTOSKRNL.EXE.@)
+ */
+ULONG WINAPI ExGetExclusiveWaiterCount( ERESOURCE *resource )
+{
+    ULONG count;
+    KIRQL irql;
+
+    TRACE("resource %p.\n", resource);
+
+    KeAcquireSpinLock( &resource->SpinLock, &irql );
+
+    count = resource->NumberOfExclusiveWaiters;
+
+    KeReleaseSpinLock( &resource->SpinLock, irql );
+
+    return count;
+}
diff --git a/include/ddk/wdm.h b/include/ddk/wdm.h
index 41c462f..241f6d6 100644
--- a/include/ddk/wdm.h
+++ b/include/ddk/wdm.h
@@ -1524,6 +1524,7 @@ void      WINAPI ExDeleteNPagedLookasideList(PNPAGED_LOOKASIDE_LIST);
 NTSTATUS  WINAPI ExDeleteResourceLite(ERESOURCE*);
 void      WINAPI ExFreePool(PVOID);
 void      WINAPI ExFreePoolWithTag(PVOID,ULONG);
+ULONG     WINAPI ExGetExclusiveWaiterCount(ERESOURCE*);
 void      WINAPI ExInitializeNPagedLookasideList(PNPAGED_LOOKASIDE_LIST,PALLOCATE_FUNCTION,PFREE_FUNCTION,ULONG,SIZE_T,ULONG,USHORT);
 NTSTATUS  WINAPI ExInitializeResourceLite(ERESOURCE*);
 PSLIST_ENTRY WINAPI ExInterlockedPopEntrySList(PSLIST_HEADER,PKSPIN_LOCK);