[PATCH v2 3/5] ntoskrnl.exe: Implement ExIsResourceAcquiredExclusiveLite().
Zebediah Figura
z.figura12 at gmail.com
Tue Apr 9 23:41:09 CDT 2019
Signed-off-by: Zebediah Figura <z.figura12 at gmail.com>
---
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 3324b3b6d8..d3e6070149 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
+++ b/dlls/ntoskrnl.exe/ntoskrnl.exe.spec
@@ -165,7 +165,7 @@
@ stub ExInterlockedPushEntryList
@ stdcall ExInterlockedRemoveHeadList(ptr ptr)
@ stub ExIsProcessorFeaturePresent
-@ stub ExIsResourceAcquiredExclusiveLite
+@ stdcall ExIsResourceAcquiredExclusiveLite(ptr)
@ stub ExIsResourceAcquiredSharedLite
@ stdcall ExLocalTimeToSystemTime(ptr ptr) RtlLocalTimeToSystemTime
@ stub ExNotifyCallback
diff --git a/dlls/ntoskrnl.exe/sync.c b/dlls/ntoskrnl.exe/sync.c
index 7009c4cfec..94b9778602 100644
--- a/dlls/ntoskrnl.exe/sync.c
+++ b/dlls/ntoskrnl.exe/sync.c
@@ -1125,3 +1125,22 @@ ULONG WINAPI ExGetSharedWaiterCount( ERESOURCE *resource )
return count;
}
+
+/***********************************************************************
+ * ExIsResourceAcquiredExclusiveLite (NTOSKRNL.EXE.@)
+ */
+BOOLEAN WINAPI ExIsResourceAcquiredExclusiveLite( ERESOURCE *resource )
+{
+ BOOLEAN ret;
+ KIRQL irql;
+
+ TRACE("resource %p.\n", resource);
+
+ KeAcquireSpinLock( &resource->SpinLock, &irql );
+
+ ret = (resource->OwnerEntry.OwnerThread == (ERESOURCE_THREAD)KeGetCurrentThread());
+
+ KeReleaseSpinLock( &resource->SpinLock, irql );
+
+ return ret;
+}
diff --git a/include/ddk/wdm.h b/include/ddk/wdm.h
index a0219c4c1e..5a84602d43 100644
--- a/include/ddk/wdm.h
+++ b/include/ddk/wdm.h
@@ -1531,6 +1531,7 @@ NTSTATUS WINAPI ExInitializeResourceLite(ERESOURCE*);
PSLIST_ENTRY WINAPI ExInterlockedPopEntrySList(PSLIST_HEADER,PKSPIN_LOCK);
PSLIST_ENTRY WINAPI ExInterlockedPushEntrySList(PSLIST_HEADER,PSLIST_ENTRY,PKSPIN_LOCK);
LIST_ENTRY * WINAPI ExInterlockedRemoveHeadList(LIST_ENTRY*,KSPIN_LOCK*);
+BOOLEAN WINAPI ExIsResourceAcquiredExclusiveLite(ERESOURCE*);
void WINAPI ExReleaseFastMutexUnsafe(PFAST_MUTEX);
void WINAPI ExReleaseResourceForThreadLite(ERESOURCE*,ERESOURCE_THREAD);
ULONG WINAPI ExSetTimerResolution(ULONG,BOOLEAN);
--
2.21.0
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