[PATCH 6/8] ntoskrnl.exe: Implement ExReleaseResourceForThreadLite().
Zebediah Figura
z.figura12 at gmail.com
Mon Apr 8 16:57:53 CDT 2019
Signed-off-by: Zebediah Figura <z.figura12 at gmail.com>
---
dlls/ntoskrnl.exe/ntoskrnl.c | 8 -----
dlls/ntoskrnl.exe/sync.c | 60 ++++++++++++++++++++++++++++++++++++
include/ddk/wdm.h | 1 +
3 files changed, 61 insertions(+), 8 deletions(-)
diff --git a/dlls/ntoskrnl.exe/ntoskrnl.c b/dlls/ntoskrnl.exe/ntoskrnl.c
index bb27f1cfe6..859c702c97 100644
--- a/dlls/ntoskrnl.exe/ntoskrnl.c
+++ b/dlls/ntoskrnl.exe/ntoskrnl.c
@@ -3369,14 +3369,6 @@ NTSTATUS WINAPI ExDeleteResourceLite(PERESOURCE resource)
return STATUS_NOT_IMPLEMENTED;
}
-/***********************************************************************
- * ExReleaseResourceForThreadLite (NTOSKRNL.EXE.@)
- */
-void WINAPI ExReleaseResourceForThreadLite( PERESOURCE resource, ERESOURCE_THREAD tid )
-{
- FIXME( "stub: %p %lu\n", resource, tid );
-}
-
/***********************************************************************
* KeEnterCriticalRegion (NTOSKRNL.EXE.@)
*/
diff --git a/dlls/ntoskrnl.exe/sync.c b/dlls/ntoskrnl.exe/sync.c
index e89fddcbba..88c9ea70c7 100644
--- a/dlls/ntoskrnl.exe/sync.c
+++ b/dlls/ntoskrnl.exe/sync.c
@@ -1006,3 +1006,63 @@ BOOLEAN WINAPI ExAcquireSharedWaitForExclusive( ERESOURCE *resource, BOOLEAN wai
return TRUE;
}
+
+/***********************************************************************
+ * ExReleaseResourceForThreadLite (NTOSKRNL.EXE.@)
+ */
+void WINAPI ExReleaseResourceForThreadLite( ERESOURCE *resource, ERESOURCE_THREAD thread )
+{
+ OWNER_ENTRY *entry;
+ KIRQL irql;
+
+ TRACE("resource %p, thread %#lx.\n", resource, thread);
+
+ KeAcquireSpinLock( &resource->SpinLock, &irql );
+
+ if (resource->Flag & ResourceOwnedExclusive)
+ {
+ if (resource->OwnerEntry.OwnerThread == thread)
+ {
+ if (!--resource->ActiveEntries)
+ {
+ resource->OwnerEntry.OwnerThread = 0;
+ resource->Flag &= ~ResourceOwnedExclusive;
+ }
+ }
+ else
+ {
+ ERR("Trying to release %p for thread %#lx, but resource is exclusively owned by %#lx.\n",
+ resource, thread, resource->OwnerEntry.OwnerThread);
+ return;
+ }
+ }
+ else
+ {
+ entry = resource_get_shared_entry( resource, thread );
+ if (entry->OwnerCount)
+ {
+ entry->OwnerCount--;
+ resource->ActiveEntries--;
+ }
+ else
+ {
+ ERR("Trying to release %p for thread %#lx, but resource is not owned by that thread.\n", resource, thread);
+ return;
+ }
+ }
+
+ if (!resource->ActiveEntries)
+ {
+ if (resource->NumberOfExclusiveWaiters)
+ {
+ KeSetEvent( resource->ExclusiveWaiters, IO_NO_INCREMENT, FALSE );
+ }
+ else if (resource->NumberOfSharedWaiters)
+ {
+ KeReleaseSemaphore( resource->SharedWaiters, IO_NO_INCREMENT,
+ resource->NumberOfSharedWaiters, FALSE );
+ }
+ }
+
+ KeReleaseSpinLock( &resource->SpinLock, irql );
+}
diff --git a/include/ddk/wdm.h b/include/ddk/wdm.h
index 4609790a66..1a3f6bbd54 100644
--- a/include/ddk/wdm.h
+++ b/include/ddk/wdm.h
@@ -1529,6 +1529,7 @@ 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*);
void WINAPI ExReleaseFastMutexUnsafe(PFAST_MUTEX);
+void WINAPI ExReleaseResourceForThreadLite(ERESOURCE*,ERESOURCE_THREAD);
ULONG WINAPI ExSetTimerResolution(ULONG,BOOLEAN);
void WINAPI IoAcquireCancelSpinLock(KIRQL*);
--
2.21.0
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