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XCSDD/docs/api/memory/pool-allocator/get-free-block-count.md
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PoolAllocator::GetFreeBlockCount

size_t GetFreeBlockCount() const;

返回当前空闲块的的数量。每次 Allocate 成功后减 1每次 Free 后加 1。

参数:

返回: 当前可分配的空闲块数量

复杂度: O(1)

示例:

#include <XCEngine/Memory/PoolAllocator.h>

PoolAllocator pool(sizeof(int), 100);

size_t initial = pool.GetFreeBlockCount(); // 100

void* blocks[10];
for (int i = 0; i < 10; ++i) {
    blocks[i] = pool.Allocate();
}

size_t after = pool.GetFreeBlockCount(); // 90

for (int i = 0; i < 5; ++i) {
    pool.Free(blocks[i]);
}

size_t final = pool.GetFreeBlockCount(); // 95

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