mem_expHeap.h

#ifndef RVL_SDK_MEM_EXP_HEAP_H
#define RVL_SDK_MEM_EXP_HEAP_H
#include <types.h>
#ifdef __cplusplus
extern "C" {
#endif
 
#define MEM_EXP_HEAP_MIN_SIZE                                                  \
    (sizeof(MEMiHeapHead) + sizeof(MEMiExpHeapHead) +                          \
     sizeof(MEMiExpHeapMBlock) + 4)
 
// Forward declarations
typedef struct MEMiHeapHead MEMiHeapHead;
 
typedef enum {
    MEM_EXP_HEAP_ALLOC_FAST, //!< When allocating memory blocks, take the first
                             //!< usable found block rather than trying to
                             //!< find a more optimal block
} MEMiExpHeapAllocMode;
 
typedef struct MEMiExpHeapMBlock {
    u16 state; // at 0x0
    union {
        u16 settings;
        struct {
            u16 allocDir : 1;
            u16 align : 7;
            u16 group : 8;
        };
    }; // at 0x2
    u32 size;                       // at 0x4
    struct MEMiExpHeapMBlock* prev; // at 0x8
    struct MEMiExpHeapMBlock* next; // at 0xC
} MEMiExpHeapMBlock;
 
typedef struct MEMiExpHeapMBlockList {
    MEMiExpHeapMBlock* head; // at 0x0
    MEMiExpHeapMBlock* tail; // at 0x4
} MEMiExpHeapMBlockList;
 
// Placed in heap after base heap head
typedef struct MEMiExpHeapHead {
    MEMiExpHeapMBlockList freeMBlocks; // at 0x0
    MEMiExpHeapMBlockList usedMBlocks; // at 0x8
    u16 group;                         // at 0x10
    union {
        u16 SHORT_0x12;
        struct {
            u16 SHORT_0x12_0_15 : 15;
            u16 allocMode : 1;
        };
    }; // at 0x12
} MEMiExpHeapHead;
 
MEMiHeapHead* MEMCreateExpHeapEx(void* start, u32 size, u16 opt);
MEMiHeapHead* MEMDestroyExpHeap(MEMiHeapHead* heap);
void* MEMAllocFromExpHeapEx(MEMiHeapHead* heap, u32 size, s32 align);
u32 MEMResizeForMBlockExpHeap(MEMiHeapHead* heap, void* memBlock, u32 size);
void MEMFreeToExpHeap(MEMiHeapHead* heap, void* memBlock);
u32 MEMGetAllocatableSizeForExpHeapEx(MEMiHeapHead* heap, s32 align);
u32 MEMAdjustExpHeap(MEMiHeapHead* heap);
 
static MEMiHeapHead* MEMCreateExpHeap(void* start, u32 size) {
    return MEMCreateExpHeapEx(start, size, 0);
}
 
static void* MEMAllocFromExpHeap(MEMiHeapHead* heap, u32 size) {
    return MEMAllocFromExpHeapEx(heap, size, 4);
}
 
static u32 MEMGetAllocatableSizeForExpHeap(MEMiHeapHead* heap) {
    return MEMGetAllocatableSizeForExpHeapEx(heap, 4);
}
 
#ifdef __cplusplus
}
#endif
#endif