[fireball] 40284: - Implement KeTestSpinLock.

Author: fireball
Date: Sun Mar 29 16:57:58 2009
New Revision: 40284

URL: http://svn.reactos.org/svn/reactos?rev=40284&view=rev
Log:
- Implement KeTestSpinLock.

Modified:
    trunk/reactos/include/ddk/winddk.h
    trunk/reactos/ntoskrnl/ke/spinlock.c

Modified: trunk/reactos/include/ddk/winddk.h
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/include/ddk/winddk.h?rev=40...
==============================================================================
--- trunk/reactos/include/ddk/winddk.h [iso-8859-1] (original)
+++ trunk/reactos/include/ddk/winddk.h [iso-8859-1] Sun Mar 29 16:57:58 2009
@@ -5791,6 +5791,13 @@
     IN OUT PKSPIN_LOCK SpinLock
 );

+NTKERNELAPI
+BOOLEAN
+FASTCALL
+KeTestSpinLock(
+    IN PKSPIN_LOCK SpinLock
+);
+
 #if defined (_X86_)

NTKERNELAPI

Modified: trunk/reactos/ntoskrnl/ke/spinlock.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/spinlock.c?rev=...
==============================================================================
--- trunk/reactos/ntoskrnl/ke/spinlock.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ke/spinlock.c [iso-8859-1] Sun Mar 29 16:57:58 2009
@@ -305,14 +305,24 @@
 }

/*
- * @unimplemented
+ * @implemented
  */
 BOOLEAN
 FASTCALL
 KeTestSpinLock(IN PKSPIN_LOCK SpinLock)
 {
-    UNIMPLEMENTED;
-    return FALSE;
+    /* Test this spinlock */
+    if (*SpinLock)
+    {
+        /* Spinlock is busy, yield execution */
+        YieldProcessor();
+
+        /* Return busy flag */
+        return FALSE;
+    }
+
+    /* Spinlock appears to be free */
+    return TRUE;
 }

/* EOF */