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#include "types.h"
#include "OS/OSAlloc.h"
// TODO: move to header
typedef enum {
OS_ARENA_MAIN = 0,
OS_ARENA_MAIN_SUBPRIV = 1,
OS_ARENA_MAINEX = 2,
OS_ARENA_ITCM = 3,
OS_ARENA_DTCM = 4,
OS_ARENA_SHARED = 5,
OS_ARENA_WRAM_MAIN = 6,
OS_ARENA_WRAM_SUB = 7,
OS_ARENA_WRAM_SUBPRIV = 8,
OS_ARENA_MAX = 9
} OSArenaId;
#define OSi_ROUND(n, a) (((u32) (n) + (a) - 1) & ~((a) - 1))
// NOTE: there is just one HeapInfo pointer in PBR, not an array
// void* OSiHeapInfo[OS_ARENA_MAX];
inline Cell* DLAddFront(Cell* list, Cell* cell)
{
cell->next = list;
cell->prev = NULL;
if (list != NULL)
list->prev = cell;
return cell;
}
inline Cell* DLExtract(Cell* list, Cell* cell)
{
if (cell->next) {
cell->next->prev = cell->prev;
}
if (cell->prev == NULL) {
list = cell->next;
} else {
cell->prev->next = cell->next;
}
return list;
}
Cell *DLInsert(Cell *original, Cell *inserted)
{
Cell *prevCell = NULL;
Cell *nextCell = original;
for (nextCell = original, prevCell = NULL; nextCell; prevCell = nextCell, nextCell = nextCell->next)
{
if (inserted <= nextCell)
break;
}
inserted->next = nextCell;
inserted->prev = prevCell;
if (nextCell != NULL)
{
nextCell->prev = inserted;
Cell * temp = (Cell *)((char *)inserted + inserted->size);
if (temp == nextCell)
{
inserted->size += nextCell->size;
nextCell = nextCell->next;
inserted->next = nextCell;
if (nextCell != NULL)
nextCell->prev = inserted;
}
}
if (prevCell != NULL)
{
prevCell->next = inserted;
Cell * temp = (Cell *)((char *)prevCell + prevCell->size);
if (temp != inserted)
return original;
prevCell->size += inserted->size;
prevCell->next = nextCell;
if (nextCell != NULL)
nextCell->prev = prevCell;
return original;
}
return inserted;
}
#if 0 // not found in DOL
static u32 gUnk8063fa6c; // aligned arenaEnd, 680
// returned by OSInitAlloc, "base address of the new arena,"
// pointer to the beginning of the real data after the heap array header, 684
static void *gUnk8063fa70;
// Table of heaps
static int gUnk8063fa74; // maxHeaps param of OSInitAlloc, 688
volatile OSHeapHandle __OSCurrHeap = -1;
void *OSInitAlloc(void *arenaStart, void *arenaEnd, int maxHeaps)
{
HeapArray = (HeapDesc *)arenaStart;
gUnk8063fa74 = maxHeaps;
for (int i = 0; i < gUnk8063fa74; i++) {
HeapArray[i].heapSize = -1; // -1 indicates this heap is unused
HeapArray[i].start = NULL;
HeapArray[i].freeList = NULL;
}
gUnk8063fa6c = (u32)arenaEnd & ~0x1f;
__OSCurrHeap = -1;
gUnk8063fa70 = (void *)(((u32)&HeapArray[maxHeaps] + 0x1f) & ~0x1f);
return gUnk8063fa70;
}
OSHeapHandle OSCreateHeap(void *start, void *end)
{
start = (void *)((u32)start + 0x1f & ~0x1f);
end = (void *)((u32)end & ~0x1f);
for (int i = 0; i < gUnk8063fa74; i++) {
if (HeapArray[i].heapSize < 0) {
HeapArray[i].heapSize = end - start;
((Cell *)start)->prev = NULL;
((Cell *)start)->next = NULL;
((Cell *)start)->size = HeapArray[i].heapSize;
HeapArray[i].start = (Cell *)start;
HeapArray[i].freeList = NULL;
return i;
}
}
return -1;
}
#endif
// arenaStart param of OSInitAlloc, points to array of
// maxHeap HeapDescs, 68c
extern HeapDesc *HeapArray;
#define HEADERSIZE OSi_ROUND(sizeof(Cell), 32)
#define MINOBJSIZE (HEADERSIZE+32)
void* OSAllocFromHeap(/*OSArenaId id,*/ OSHeapHandle heap, u32 size) {
// OSHeapInfo* heapInfo;
HeapDesc* hd;
Cell* cell;
Cell* newCell;
long leftoverSize;
/*
OSIntrMode enabled = OS_DisableInterrupts();
heapInfo = OSiHeapInfo[id];
if (!heapInfo) {
(void)OS_RestoreInterrupts(enabled);
return NULL;
}
if (heap < 0) {
heap = heapInfo->currentHeap;
}
*/
//hd = &heapInfo->heapArray[heap];
hd = &HeapArray[heap];
size += HEADERSIZE;
size = OSi_ROUND(size, 32);
for (cell = hd->free; cell != NULL; cell = cell->next) {
if ((long)size <= cell->size) {
break;
}
}
if (cell == NULL) {
//(void)OS_RestoreInterrupts(enabled);
return NULL;
}
leftoverSize = cell->size - (long)size;
if (leftoverSize < MINOBJSIZE) {
hd->free = DLExtract(hd->free, cell);
} else {
cell->size = (long)size;
newCell = (Cell *) ((char *)cell + size);
newCell->size = leftoverSize;
newCell->prev = cell->prev;
newCell->next = cell->next;
if (newCell->next != NULL) {
newCell->next->prev = newCell;
}
if (newCell->prev != NULL) {
newCell->prev->next = newCell;
} else {
hd->free = newCell;
}
}
hd->allocated = DLAddFront(hd->allocated, cell);
//(void)OS_RestoreInterrupts(enabled);
return (void *)((char *)cell + HEADERSIZE);
}
void OSFreeToHeap(/*OSArenaId id,*/ OSHeapHandle heap, void* ptr) {
OSHeapInfo *heapInfo;
HeapDesc *hd;
Cell *cell;
/*
OSIntrMode enabled = OS_DisableInterrupts();
heapInfo = OSiHeapInfo[id];
if (heap < 0) {
heap = heapInfo->currentHeap;
}
*/
cell = (Cell *) ((char *)ptr - HEADERSIZE);
//hd = &heapInfo->heapArray[heap];
hd = &HeapArray[heap];
hd->allocated = DLExtract(hd->allocated, cell);
hd->free = DLInsert(hd->free, cell);
//(void)OS_RestoreInterrupts(enabled);
}
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