Initial semaphores support

sdk/xtdk/kefuncs.h

@@ -16,6 +16,12 @@
 
 
 /* Kernel services routines forward references */
+XTAPI
+VOID
+KeInitializeSemaphore(IN PKSEMAPHORE Semaphore,
+                      IN LONG Count,
+                      IN LONG Limit);
+
 XTAPI
 VOID
 KeInitializeSpinLock(IN PKSPIN_LOCK SpinLock);

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/semphore.c
     ${XTOSKRNL_SOURCE_DIR}/ke/spinlock.c
     ${XTOSKRNL_SOURCE_DIR}/ke/timer.c
     ${XTOSKRNL_SOURCE_DIR}/ke/${ARCH}/krnlinit.c

xtoskrnl/ke/semphore.c

@@ -0,0 +1,41 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/ke/semphore.c
+ * DESCRIPTION:     Semaphores support
+ * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ */
+
+#include <xtos.h>
+
+
+/**
+ * initializes a kernel semaphore object.
+ *
+ * @param Semaphore
+ *        Supplies a pointer to a semaphore object.
+ *
+ * @param Count
+ *        Specifies the initial count value of the semaphore.
+ *
+ * @param Limit
+ *        Specifies a maximum count value of the semaphore.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since NT 3.5
+ */
+XTAPI
+VOID
+KeInitializeSemaphore(IN PKSEMAPHORE Semaphore,
+                      IN LONG Count,
+                      IN LONG Limit)
+{
+    /* Initialize semaphore header and limit */
+    Semaphore->Header.Type = SemaphoreObject;
+    Semaphore->Header.SignalState = Count;
+    Semaphore->Limit = Limit;
+
+    /* Initialize semaphore wait list */
+    RtlInitializeListHead(&Semaphore->Header.WaitListHead);
+}