242f225b75
- Add ModelRender - Add Camera - Add TextRenderer - Add RTTI Object class - Add PhysicsCollider interface: getClassName method - Add AlignedMemoryStack class - fix Logger and LoggerSpdLog - fix Model2D method: getPhysics, remove const qualifier
53 lines
1.3 KiB
C++
53 lines
1.3 KiB
C++
#pragma once
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#include <memory>
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#include <vector>
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#include <stack>
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class AlignedMemoryStack {
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char* buffer = nullptr;
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size_t capacity = 0;
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size_t offset = 0;
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std::stack<size_t> markers;
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public:
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AlignedMemoryStack(size_t initialSize = 64 * 1024) {
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buffer = new char[initialSize];
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capacity = initialSize;
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}
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~AlignedMemoryStack() {
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delete[] buffer;
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}
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void* pushStackAlloc(size_t size, size_t align = alignof(std::max_align_t)) {
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size_t aligned = (offset + align - 1) & ~(align - 1);
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if (aligned + size > capacity) {
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// 简单扩容策略：直接翻倍
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size_t newCapacity = (aligned + size) * 2;
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char* newBuffer = new char[newCapacity];
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std::memcpy(newBuffer, buffer, offset);
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delete[] buffer;
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buffer = newBuffer;
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capacity = newCapacity;
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}
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void* ptr = buffer + aligned;
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markers.push(offset);
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offset = aligned + size;
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return ptr;
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}
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template<typename PtrType>
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PtrType* pushStackAllocate(size_t size, size_t align = alignof(std::max_align_t)) {
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return pushStackAlloc(size, align);
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}
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void popStack() {
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offset = markers.top();
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markers.pop();
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}
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void reset() {
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offset = 0;
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markers = std::stack<size_t>();
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}
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}; |