From 4bdfee8e8bec17c37b7b57720f460fe3bded2e6a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Herm=C3=A8s=20B=C3=A9lusca-Ma=C3=AFto?=
 <hermes.belusca-maito@reactos.org>
Date: Sun, 7 Nov 2021 01:17:32 +0100
Subject: [PATCH] [NTOS:EX] Initialize ExpResourceTimeoutCount also via the
 "Session Manager/ResourceTimeoutCount" registry value (#4089)

For more details, see
http://systemmanager.ru/win2k_regestry.en/29859.htm
https://www.betaarchive.com/wiki/index.php/Microsoft_KB_Archive/102985#ResourceTimeoutCount_REG_DWORD
---
 ntoskrnl/config/cmdata.c       |  2 +-
 ntoskrnl/ex/resource.c         | 15 ++++++++++-----
 ntoskrnl/include/internal/ex.h |  1 +
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/ntoskrnl/config/cmdata.c b/ntoskrnl/config/cmdata.c
index 28ac7041793..80c91534b44 100644
--- a/ntoskrnl/config/cmdata.c
+++ b/ntoskrnl/config/cmdata.c
@@ -561,7 +561,7 @@ DATA_SEG("INITDATA") CM_SYSTEM_CONTROL_VECTOR CmControlVector[] =
     {
         L"Session Manager",
         L"ResourceTimeoutCount",
-        &DummyData,
+        &ExpResourceTimeoutCount,
         NULL,
         NULL
     },
diff --git a/ntoskrnl/ex/resource.c b/ntoskrnl/ex/resource.c
index 5b90c89813c..2ea09a92053 100644
--- a/ntoskrnl/ex/resource.c
+++ b/ntoskrnl/ex/resource.c
@@ -18,7 +18,7 @@
 #define IsOwnedExclusive(r)     (r->Flag & ResourceOwnedExclusive)
 #define IsBoostAllowed(r)       (!(r->Flag & ResourceHasDisabledPriorityBoost))
 
-#if (!(defined(CONFIG_SMP)) && !(DBG))
+#if !defined(CONFIG_SMP) && !DBG
 
 FORCEINLINE
 VOID
@@ -65,13 +65,17 @@ ExReleaseResourceLock(IN PERESOURCE Resource,
     /* Release the lock */
     KeReleaseInStackQueuedSpinLock(LockHandle);
 }
-#endif
+
+#endif // !defined(CONFIG_SMP) && !DBG
 
 /* DATA***********************************************************************/
 
 LARGE_INTEGER ExShortTime = {{-100000, -1}};
 LARGE_INTEGER ExpTimeout;
-ULONG ExpResourceTimeoutCount = 90 * 3600 / 2;
+
+/* Timeout value for resources in 4-second units (7 days) */
+ULONG ExpResourceTimeoutCount = 90 * 3600 / 2; // NT value: 648000 (30 days)
+
 KSPIN_LOCK ExpResourceSpinLock;
 LIST_ENTRY ExpSystemResourcesList;
 BOOLEAN ExResourceStrict = TRUE;
@@ -631,7 +635,7 @@ ExpWaitForResource(IN PERESOURCE Resource,
 
     /* Increase contention count and use a 5 second timeout */
     Resource->ContentionCount++;
-    Timeout.QuadPart = 500 * -10000;
+    Timeout.QuadPart = 500 * -10000LL;
     for (;;)
     {
         /* Wait for ownership */
@@ -640,7 +644,8 @@ ExpWaitForResource(IN PERESOURCE Resource,
                                        KernelMode,
                                        FALSE,
                                        &Timeout);
-        if (Status != STATUS_TIMEOUT) break;
+        if (Status != STATUS_TIMEOUT)
+            break;
 
         /* Increase wait count */
         WaitCount++;
diff --git a/ntoskrnl/include/internal/ex.h b/ntoskrnl/include/internal/ex.h
index 03d9d29a8b5..f80cc7f8efd 100644
--- a/ntoskrnl/include/internal/ex.h
+++ b/ntoskrnl/include/internal/ex.h
@@ -19,6 +19,7 @@ extern ERESOURCE ExpFirmwareTableResource;
 extern ERESOURCE ExpTimeRefreshLock;
 extern LIST_ENTRY ExpFirmwareTableProviderListHead;
 extern BOOLEAN ExpIsWinPEMode;
+extern ULONG ExpResourceTimeoutCount;
 extern LIST_ENTRY ExpSystemResourcesList;
 extern ULONG ExpAnsiCodePageDataOffset, ExpOemCodePageDataOffset;
 extern ULONG ExpUnicodeCaseTableDataOffset;