From 277872438cb6f52662ee093a1385a6a6556e7c53 Mon Sep 17 00:00:00 2001
From: bxing <bxing@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Mon, 29 May 2006 02:34:09 +0000
Subject: [PATCH 1/1] Change SPIN_LOCK_ACQUIRED to 1 and SPIN_LOCK_RELEASED to
 2 according to MWG.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@310 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdePkg/Library/BaseLib/Synchronization.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/MdePkg/Library/BaseLib/Synchronization.c b/MdePkg/Library/BaseLib/Synchronization.c
index df395869a2..c04edfc251 100644
--- a/MdePkg/Library/BaseLib/Synchronization.c
+++ b/MdePkg/Library/BaseLib/Synchronization.c
@@ -14,8 +14,8 @@
 
 **/
 
-#define SPIN_LOCK_RELEASED          ((SPIN_LOCK)0)
-#define SPIN_LOCK_ACQUIRED          ((SPIN_LOCK)-1)
+#define SPIN_LOCK_RELEASED          ((SPIN_LOCK)1)
+#define SPIN_LOCK_ACQUIRED          ((SPIN_LOCK)2)
 
 UINT32
 EFIAPI
@@ -94,7 +94,7 @@ InitializeSpinLock (
   )
 {
   ASSERT (SpinLock != NULL);
-  *SpinLock = 0;
+  *SpinLock = SPIN_LOCK_RELEASED;
   return SpinLock;
 }
 
@@ -178,6 +178,7 @@ AcquireSpinLockOrFail (
   )
 {
   ASSERT (SpinLock != NULL);
+  ASSERT (*SpinLock == SPIN_LOCK_ACQUIRED || *SpinLock == SPIN_LOCK_RELEASED);
   return (BOOLEAN)(
            InterlockedCompareExchangePointer (
              (VOID**)SpinLock,
@@ -208,7 +209,8 @@ ReleaseSpinLock (
   )
 {
   ASSERT (SpinLock != NULL);
-  *SpinLock = 0;
+  ASSERT (*SpinLock == SPIN_LOCK_ACQUIRED || *SpinLock == SPIN_LOCK_RELEASED);
+  *SpinLock = SPIN_LOCK_RELEASED;
   return SpinLock;
 }
 
-- 
2.39.2