From bd4b6b3f9c9c3e9dc968d27df0faa2a615916ddc Mon Sep 17 00:00:00 2001
From: robojumper <robojumper@gmail.com>
Date: Sun, 5 May 2024 14:12:22 +0200
Subject: eggThread matching

---
 src/egg/core/eggThread.cpp | 125 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 src/egg/core/eggThread.cpp

(limited to 'src/egg/core/eggThread.cpp')

diff --git a/src/egg/core/eggThread.cpp b/src/egg/core/eggThread.cpp
new file mode 100644
index 00000000..36f44d4d
--- /dev/null
+++ b/src/egg/core/eggThread.cpp
@@ -0,0 +1,125 @@
+#include <egg/core/eggThread.h>
+
+namespace EGG {
+
+/* 80673b10 */ nw4r::ut::List Thread::sThreadList;
+/* 80576770 */ void (*Thread::sOldSwitchThreadCallback)(OSThread *, OSThread *);
+
+
+/* 80496910 */ Thread::Thread(u32 stackSize, int msgCount, int priority, Heap *heap) {
+    if (heap == nullptr) {
+        heap = Heap::sCurrentHeap;
+    }
+
+    mContainingHeap = heap;
+    mStackSize = ROUND_DOWN(stackSize, 0x20);
+    mStackMemory = Heap::alloc(ROUND_DOWN(stackSize, 0x20), 0x20, heap);
+    mOSThread = Heap::alloc<OSThread>(mContainingHeap, 0x20);
+    OSCreateThread(mOSThread, start, this, (char *)mStackMemory + mStackSize, mStackSize, priority, 1);
+    mAllocatableHeap = nullptr;
+    mCurrentHeap = nullptr;
+    setCommonMesgQueue(msgCount, mContainingHeap);
+}
+
+/* 804969e0 */ Thread::Thread(OSThread *osThread, int msgCount) {
+    mContainingHeap = nullptr;
+    mOSThread = osThread;
+    mStackSize = (u8 *)osThread->stackBegin - (u8 *)osThread->stackEnd;
+    mStackMemory = osThread->stackEnd;
+    mAllocatableHeap = nullptr;
+    mCurrentHeap = nullptr;
+    setCommonMesgQueue(msgCount, Heap::sCurrentHeap);
+}
+
+/* 80496a60 */ Thread::~Thread() {
+    nw4r::ut::List_Remove(&sThreadList, this);
+    if (mContainingHeap != nullptr) {
+        if (!OSIsThreadTerminated(mOSThread)) {
+            OSDetachThread(mOSThread);
+            OSCancelThread(mOSThread);
+        }
+        Heap::free(mStackMemory, mContainingHeap);
+        Heap::free(mOSThread, mContainingHeap);
+    }
+    Heap::free(mMesgBuffer, nullptr);
+}
+
+/* 80496b20 */ Thread *Thread::findThread(OSThread *thread) {
+    Thread *ptr = nullptr;
+    while ((ptr = (Thread *)nw4r::ut::List_GetNext(&sThreadList, ptr)) != nullptr) {
+        if (ptr->mOSThread == thread) {
+            return ptr;
+        }
+    }
+    return nullptr;
+}
+
+/* 80496b90 */ void Thread::initialize() {
+    // TODO offsetof
+    nw4r::ut::List_Init(&sThreadList, 0x44);
+    sOldSwitchThreadCallback = OSSetSwitchThreadCallback(switchThreadCallback);
+}
+
+/* 80496bd0 */ void Thread::setThreadCurrentHeap(Heap *heap) {
+    OSDisableScheduler();
+    OSThread *myThread = mOSThread;
+    OSThread *currentThread = OSGetCurrentThread();
+    if (currentThread != myThread) {
+        mCurrentHeap = heap;
+    } else {
+        if (heap != nullptr) {
+            if (mCurrentHeap == nullptr) {
+                mCurrentHeap = Heap::sCurrentHeap;
+            }
+            heap->_becomeCurrentHeapWithoutLock();
+        } else {
+            if (mCurrentHeap != nullptr) {
+                mCurrentHeap->_becomeCurrentHeapWithoutLock();
+                mCurrentHeap = nullptr;
+            }
+        }
+    }
+
+    OSEnableScheduler();
+}
+
+/* 80496c70 */ void Thread::switchThreadCallback(OSThread *from, OSThread *to) {
+    Thread *fromThread = from != nullptr ? findThread(from) : nullptr;
+    Thread *toThread = to != nullptr ? findThread(to) : nullptr;
+    
+    if (fromThread != nullptr) {
+        fromThread->onExit();
+        if (fromThread->mCurrentHeap != nullptr) {
+            Heap *curr = Heap::sCurrentHeap;
+            fromThread->mCurrentHeap->_becomeCurrentHeapWithoutLock();
+            fromThread->mCurrentHeap = curr;
+        }
+    }
+    
+    if (toThread != nullptr) {
+        if (toThread->mCurrentHeap != nullptr) {
+            Heap *curr = Heap::sCurrentHeap;
+            toThread->mCurrentHeap->_becomeCurrentHeapWithoutLock();
+            toThread->mCurrentHeap = curr;
+        }
+        toThread->onEnter();
+    }
+
+    if (sOldSwitchThreadCallback != nullptr) {
+        (sOldSwitchThreadCallback)(from, to);
+    }
+}
+
+/* 80496d60 */ void Thread::setCommonMesgQueue(int mesgCount, Heap *heap) {
+    mMesgCount = mesgCount;
+    mMesgBuffer = Heap::alloc<OSMessage>(mesgCount, heap);
+    OSInitMessageQueue(&mMesgQueue, mMesgBuffer, mMesgCount);
+    nw4r::ut::List_Append(&sThreadList, this);
+}
+
+/* 80496dc0 */ void *Thread::start(void *arg) {
+    Thread *thread = static_cast<Thread*>(arg);
+    return thread->run();
+}
+
+} // namespace EGG
-- 
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