ksys: Start adding OverlayArenaSystem

src/KingSystem/System/OverlayArena.cpp

@@ -0,0 +1,62 @@
+#include "KingSystem/System/OverlayArena.h"
+#include <heap/seadExpHeap.h>
+#include "KingSystem/Resource/resResourceMgrTask.h"
+#include "KingSystem/Resource/resSystem.h"
+
+namespace ksys {
+
+OverlayArena::OverlayArena() {
+    // FIXME: these should use offsetof()
+    mUnits.initOffset(0xc0);
+    mOffsetList2.initOffset(0xd0);
+}
+
+OverlayArena::~OverlayArena() {
+    destroy();
+}
+
+// NON_MATCHING: branching at the end (csel instead of a branch)
+bool OverlayArena::init(const OverlayArena::InitArg& arg) {
+    if (!arg.heap) {
+        res::stubbedLogFunction();
+        return false;
+    }
+
+    if (arg.size == 0)
+        res::stubbedLogFunction();
+
+    mFlags.change(Flag::_1, arg.set_flag_1);
+
+    mHeap = sead::ExpHeap::create(arg.size, arg.name, arg.heap, arg.alignment,
+                                  sead::Heap::cHeapDirection_Forward, true);
+
+    if (arg.use_best_fit_alloc_mode)
+        mHeap->setAllocMode(sead::ExpHeap::AllocMode::BestFit);
+
+    mHeapSize = mHeap->getSize();
+    _cc = 0;
+    mHeapFreeSize = mHeap->getFreeSize();
+    mHeapName = mHeap->getName();
+    mUsagePercentage = 0.0;
+    _c8 = 0;
+    mMinFreePercentage = arg.min_free_percentage;
+
+    if (res::ResourceMgrTask::instance())
+        res::ResourceMgrTask::instance()->insertOverlayArena(this);
+
+    mFlags.change(Flag::_20, arg.set_flag_20);
+    mFlags.change(Flag::_10, arg.set_flag_10);
+
+    struct UnusedTemp {
+        sead::SafeString str;
+        void* _10 = nullptr;
+    };
+    [[maybe_unused]] UnusedTemp temp;
+    temp.str = arg.name;
+
+    mFlags.change(Flag::_8, arg.set_flag_8);
+
+    return true;
+}
+
+}  // namespace ksys