XCSDD/docs/api/memory/allocator/get-total-allocated.md

IAllocator::GetTotalAllocated

virtual size_t GetTotalAllocated() const = 0;

返回此分配器自创建以来累计分配的字节总数。这是一个只读查询操作，不会修改任何内部状态。

参数： 无

返回： 累计已分配的字节数

复杂度： O(1)

示例：

#include <XCEngine/Memory/Allocator.h>

class MyAllocator : public IAllocator {
    size_t m_allocated = 0;
public:
    void* Allocate(size_t size, size_t alignment = 0) override {
        void* ptr = ::operator new(size);
        m_allocated += size;
        return ptr;
    }
    
    void Free(void* ptr) override {
        if (ptr) ::operator delete(ptr);
    }
    
    void* Reallocate(void* ptr, size_t newSize) override { /* ... */ }
    
    size_t GetTotalAllocated() const override { return m_allocated; }
    size_t GetTotalFreed() const override { return 0; }
    size_t GetPeakAllocated() const override { return m_allocated; }
    size_t GetAllocationCount() const override { return 0; }
    const char* GetName() const override { return "MyAllocator"; }
};

MyAllocator alloc;
alloc.Allocate(100);
alloc.Allocate(200);
size_t total = alloc.GetTotalAllocated(); // 返回 300

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