Heap.hh

#pragma once
 
#include "egg/core/Disposer.hh"
 
#include <abstract/memory/HeapCommon.hh>
 
#include <list>
#include <new>
 
namespace Kinoko {
 
namespace Host {
 
class Context;
 
} // namespace Host
 
namespace EGG {
 
class ExpHeap;

class Heap : Disposer {
    friend class Host::Context;
 
public:
    enum class Kind {
        None,
        Expanded,
        Frame,
        Unit,
        Assert,
    };
 
    Heap(Abstract::Memory::MEMiHeapHead *handle);
    ~Heap() override;
 
    virtual void destroy() = 0;
    virtual Kind getHeapKind() const = 0;
    virtual void *alloc(size_t size, s32 align) = 0;
    virtual void free(void *block) = 0;
    virtual u32 getAllocatableSize(s32 align = 4) const = 0;
 
    void dispose();
 
    void disableAllocation() {
        m_flags.setBit(eFlags::Lock);
    }
 
    void enableAllocation() {
        m_flags.resetBit(eFlags::Lock);
    }
 
    [[nodiscard]] bool tstDisableAllocation() const {
        return m_flags.onBit(eFlags::Lock);
    }
 
    void appendDisposer(Disposer *disposer) {
        m_children.append(disposer);
    }
 
    void removeDisposer(Disposer *disposer) {
        m_children.remove(disposer);
    }
 
    Heap *becomeAllocatableHeap();
    Heap *becomeCurrentHeap();
 
    void registerHeapBuffer(void *buffer) {
        m_block = buffer;
    }
 
    [[nodiscard]] void *getStartAddress() {
        return this;
    }
 
    [[nodiscard]] void *getEndAddress() {
        return m_handle->getHeapEnd();
    }
 
    [[nodiscard]] const char *getName() const {
        return m_name;
    }

    [[nodiscard]] Heap *getParentHeap() const {
        return m_parentHeap;
    }
 
    void setName(const char *name) {
        m_name = name;
    }
 
    void setParentHeap(Heap *heap) {
        m_parentHeap = heap;
    }
 
    static void initialize();
    [[nodiscard]] static void *alloc(size_t size, int align, Heap *pHeap);
    static void free(void *block, Heap *pHeap);
 
    [[nodiscard]] static Heap *findHeap(Abstract::Memory::MEMiHeapHead *handle);
    [[nodiscard]] static Heap *findContainHeap(const void *block);
 
    [[nodiscard]] static ExpHeap *dynamicCastToExp(Heap *heap) {
        return heap->getHeapKind() == Kind::Expanded ? reinterpret_cast<ExpHeap *>(heap) : nullptr;
    }
 
    [[nodiscard]] static Heap *getCurrentHeap() {
        return s_currentHeap;
    }
 
    [[nodiscard]] static constexpr uintptr_t getOffset() {
        // offsetof doesn't work, so instead of hardcoding an offset, we derive it ourselves
        return reinterpret_cast<uintptr_t>(&reinterpret_cast<Heap *>(NULL)->m_link);
    }
 
protected:
    enum class eFlags {
        Lock = 0,
    };
    typedef TBitFlag<u16, eFlags> Flags;
 
    Abstract::Memory::MEMiHeapHead *m_handle;
    void *m_block;
    Heap *m_parentHeap;
    Flags m_flags;
    Abstract::Memory::MEMLink m_link;
    Abstract::Memory::MEMList m_children;
    const char *m_name;
 
    static Abstract::Memory::MEMList s_heapList;
 
    static Heap *s_currentHeap;
    static Heap *s_allocatableHeap;
};
 
[[nodiscard]] void *egg_alloc(size_t size, s32 align = 4, Heap *pHeap = nullptr);
void egg_free(void *block, Heap *pHeap = nullptr);
 
template <typename T, typename... Args>
[[nodiscard]] T *egg_new(Args &&...args) {
    return ::new (egg_alloc(sizeof(T), static_cast<s32>(alignof(T))))
            T(std::forward<Args>(args)...);
}
 
template <typename T>
void egg_delete(const T *ptr) {
    if (ptr) {
        ptr->~T();
        egg_free(const_cast<T *>(ptr));
    }
}
 
template <typename T>
[[nodiscard]] T *egg_new_array(size_t count) {
    T *p = static_cast<T *>(egg_alloc(sizeof(T) * count, static_cast<s32>(alignof(T))));
    for (size_t i = 0; i < count; ++i) {
        ::new (p + i) T();
    }
    return p;
}
 
template <typename T>
void egg_delete_array(T *ptr, size_t count) {
    if (ptr) {
        for (size_t i = count; i-- > 0;) {
            ptr[i].~T();
        }
        egg_free(ptr);
    }
}
 
} // namespace EGG
 
} // namespace Kinoko

#define EGG_NEW_DELETE_FRIEND \
    template <typename T, typename... Args> \
    friend T *Kinoko::EGG::egg_new(Args &&...args); \
    template <typename T> \
    friend void Kinoko::EGG::egg_delete(const T *ptr);