From ae5aa8db7c07a162cf140a30e9af772c57e4b16b Mon Sep 17 00:00:00 2001
From: Derek Hensley <hensley.derek58@gmail.com>
Date: Thu, 17 Aug 2023 09:45:57 -0700
Subject: system_heap (007060) OK (#60)

* OK

* Renames + cleanup

* format

---------

Co-authored-by: emilybrooks <emilybrooksemilybrooks@gmail.com>
---
 src/boot/O2/system_heap.c | 128 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 src/boot/O2/system_heap.c

(limited to 'src/boot')

diff --git a/src/boot/O2/system_heap.c b/src/boot/O2/system_heap.c
new file mode 100644
index 0000000..19a0d6a
--- /dev/null
+++ b/src/boot/O2/system_heap.c
@@ -0,0 +1,128 @@
+/**
+ * @file system_heap.c
+ *
+ * Original file name unknown, as well as all function names.
+ *
+ * @note:
+ *  Only SystemHeap_Init() is used, and is essentially just a wrapper for SystemArena_Init().
+ *
+ */
+
+#include "system_heap.h"
+#include "libc/stdint.h"
+#include "libc64/osmalloc.h"
+#include "libc64/malloc.h"
+#include "unk.h"
+
+typedef void (*BlockFunc)(void*);
+typedef void (*BlockFunc1)(void*, u32);
+typedef void (*BlockFunc8)(void*, u32, u32, u32, u32, u32, u32, u32, u32);
+
+typedef struct InitFunc {
+    /* 0x0 */ uintptr_t nextOffset;
+    /* 0x4 */ void (*func)(void);
+} InitFunc; // size = 0x8
+
+void* sInitFuncs = NULL;
+
+char sNew[] = "";
+
+UNK_TYPE1 D_8003C568_jp[] = {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7F, 0x80, 0x00, 0x00,
+    0xFF, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00,
+};
+
+void* SystemHeap_Malloc(size_t size) {
+    if (size == 0) {
+        size = 1;
+    }
+    return __osMalloc(&malloc_arena, size);
+}
+
+void SystemHeap_Free(void* ptr) {
+    if (ptr != NULL) {
+        __osFree(&malloc_arena, ptr);
+    }
+}
+
+void SystemHeap_RunBlockFunc(void* blk, size_t nBlk, size_t blkSize, BlockFunc blockFunc) {
+    uintptr_t pos = (uintptr_t)blk;
+
+    for (; pos < (uintptr_t)blk + (nBlk * blkSize); pos += (blkSize & ~0)) {
+        blockFunc((void*)pos);
+    }
+}
+
+void SystemHeap_RunBlockFunc1(void* blk, size_t nBlk, size_t blkSize, BlockFunc1 blockFunc) {
+    uintptr_t pos = (uintptr_t)blk;
+
+    for (; pos < (uintptr_t)blk + (nBlk * blkSize); pos += (blkSize & ~0)) {
+        blockFunc((void*)pos, 2);
+    }
+}
+
+void* SystemHeap_RunBlockFunc8(void* blk, size_t nBlk, size_t blkSize, BlockFunc8 blockFunc) {
+    if (blk == NULL) {
+        blk = SystemHeap_Malloc(nBlk * blkSize);
+    }
+
+    if ((blk != NULL) && (blockFunc != NULL)) {
+        uintptr_t pos = (uintptr_t)blk;
+
+        for (; pos < (uintptr_t)blk + (nBlk * blkSize); pos += (blkSize & ~0)) {
+            blockFunc((void*)pos, 0, 0, 0, 0, 0, 0, 0, 0);
+        }
+    }
+
+    return blk;
+}
+
+void SystemHeap_RunBlockFunc1Reverse(void* blk, size_t nBlk, size_t blkSize, BlockFunc1 blockFunc, s32 shouldFree) {
+    uintptr_t pos;
+    uintptr_t start;
+    size_t maskedBlkSize;
+
+    if (blk == NULL) {
+        return;
+    }
+
+    if (blockFunc != NULL) {
+        start = (uintptr_t)blk;
+        maskedBlkSize = (blkSize & ~0);
+        pos = (uintptr_t)start + (nBlk * blkSize);
+
+        while (pos > start) {
+            pos -= maskedBlkSize;
+            blockFunc((void*)pos, 2);
+        }
+    }
+
+    if (shouldFree) {
+        SystemHeap_Free(blk);
+    }
+}
+
+void SystemHeap_RunInits(void) {
+    InitFunc* initFunc = (InitFunc*)&sInitFuncs;
+    u32 nextOffset = initFunc->nextOffset;
+    InitFunc* prev = NULL;
+
+    while (nextOffset != 0) {
+        initFunc = (InitFunc*)((uintptr_t)initFunc + nextOffset);
+
+        if (initFunc->func != NULL) {
+            (*initFunc->func)();
+        }
+
+        nextOffset = initFunc->nextOffset;
+        initFunc->nextOffset = (uintptr_t)prev;
+        prev = initFunc;
+    }
+
+    sInitFuncs = prev;
+}
+
+void SystemHeap_Init(void* heap, size_t size) {
+    MallocInit(heap, size);
+    SystemHeap_RunInits();
+}
-- 
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