Start of DPCs. Queuing them, but not yet dispatching.

src/xenia/kernel/native_list.cc

@@ -0,0 +1,68 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include <xenia/kernel/native_list.h>
+
+
+using namespace xe;
+using namespace xe::kernel;
+
+
+NativeList::NativeList(Memory* memory) :
+    memory_(memory),
+    head_(kInvalidPointer) {
+}
+
+void NativeList::Insert(uint32_t ptr) {
+  uint8_t* mem = memory_->membase();
+  XESETUINT32BE(mem + ptr + 4, head_);
+  XESETUINT32BE(mem + ptr + 8, 0);
+  if (head_) {
+    XESETUINT32BE(mem + head_ + 8, ptr);
+  }
+  head_ = ptr;
+}
+
+bool NativeList::IsQueued(uint32_t ptr) {
+  uint8_t* mem = memory_->membase();
+  uint32_t flink = XEGETUINT32BE(mem + ptr + 4);
+  uint32_t blink = XEGETUINT32BE(mem + ptr + 8);
+  return head_ == ptr || flink || blink;
+}
+
+void NativeList::Remove(uint32_t ptr) {
+  uint8_t* mem = memory_->membase();
+  uint32_t flink = XEGETUINT32BE(mem + ptr + 4);
+  uint32_t blink = XEGETUINT32BE(mem + ptr + 8);
+  if (ptr == head_) {
+    head_ = flink;
+    if (flink) {
+      XESETUINT32BE(mem + flink + 8, 0);
+    }
+  } else {
+    if (blink) {
+      XESETUINT32BE(mem + blink + 4, flink);
+    }
+    if (flink) {
+      XESETUINT32BE(mem + flink + 8, blink);
+    }
+  }
+  XESETUINT32BE(mem + ptr + 4, 0);
+  XESETUINT32BE(mem + ptr + 8, 0);
+}
+
+uint32_t NativeList::Shift() {
+  if (!head_) {
+    return 0;
+  }
+
+  uint32_t ptr = head_;
+  Remove(ptr);
+  return ptr;
+}