Implement KeInitializeSpinLock() routine

xtoskrnl/CMakeLists.txt

@@ -18,6 +18,7 @@ list(APPEND XTOSKRNL_SOURCE
     ${XTOSKRNL_SOURCE_DIR}/hl/${ARCH}/ioport.c
     ${XTOSKRNL_SOURCE_DIR}/ke/globals.c
     ${XTOSKRNL_SOURCE_DIR}/ke/krnlinit.c
+    ${XTOSKRNL_SOURCE_DIR}/ke/spinlock.c
     ${XTOSKRNL_SOURCE_DIR}/ke/timer.c
     ${XTOSKRNL_SOURCE_DIR}/ke/${ARCH}/krnlinit.c
     ${XTOSKRNL_SOURCE_DIR}/ke/${ARCH}/proc.c

xtoskrnl/ke/spinlock.c

@@ -0,0 +1,28 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/ke/spinlock.c
+ * DESCRIPTION:     Spinlocks support
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include <xtos.h>
+
+
+/**
+ * Initializes a spinlock.
+ *
+ * @param SpinLock
+ *        Supplies a pointer to a kernel spin lock.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since NT 3.5
+ */
+XTAPI
+VOID
+KeInitializeSpinLock(IN PKSPIN_LOCK SpinLock)
+{
+    /* Zero initialize spinlock */
+    *SpinLock = 0;
+}