Add CheckApcDelivery to evaluate APC interrupt request or direct delivery

xtoskrnl/ke/apc.cc

@@ -4,11 +4,78 @@
  * FILE:            xtoskrnl/ke/apc.cc
  * DESCRIPTION:     Kernel APC objects support
  * DEVELOPERS:      Rafal Kupiec <belliash@codingworkshop.eu.org>
+ *                  Aiken Harris <harraiken91@gmail.com>
  */
 
 #include <xtos.hh>
 
 
+/**
+ * Checks if a kernel APC can be delivered and initiates the delivery process.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+KE::Apc::CheckApcDelivery(VOID)
+{
+    PKTHREAD Thread;
+
+    /* Check if system is running at PASSIVE level */
+    if(KE::RunLevel::GetCurrentRunLevel() == PASSIVE_LEVEL)
+    {
+        /* Raise runlevel to APC level */
+        KE::RaiseRunLevel RunLevel(APC_LEVEL);
+
+        /* Deliver the APC */
+        DeliverApc(KernelMode, NULLPTR, NULLPTR);
+    }
+    else
+    {
+        /* Mark the current thread as having a pending kernel APC */
+        Thread = KE::Processor::GetCurrentThread();
+        Thread->ApcState.KernelApcPending = TRUE;
+
+        /* Request an APC software interrupt */
+        HL::Irq::SendSoftwareInterrupt(APC_LEVEL);
+    }
+}
+
+/**
+ * Delivers pending Asynchronous Procedure Calls (APCs) to the current executing thread.
+ *
+ * @param ProcessorMode
+ *        Supplies the processor execution mode at the time the APC delivery was requested.
+ *
+ * @param ExceptionFrame
+ *        Supplies an optional pointer to the exception frame if the APC is being delivered following an exception.
+ *
+ * @param TrapFrame
+ *        Supplies an optional pointer to the trap frame if the APC is being delivered following an interrupt.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+KE::Apc::DeliverApc(IN KPROCESSOR_MODE ProcessorMode,
+                    IN PKEXCEPTION_FRAME ExceptionFrame,
+                    IN PKTRAP_FRAME TrapFrame)
+{
+    PKTHREAD Thread;
+
+    UNIMPLEMENTED;
+
+    /* Get the current thread */
+    Thread = KE::Processor::GetCurrentThread();
+
+    /* Clear the pending kernel APC flag */
+    Thread->ApcState.KernelApcPending = FALSE;
+}
+
 /**
  * Initializes an APC object.
  *