创建一个作用域的自定义内存池/分配器？ [英] Creating a scoped custom memory pool/allocator?

问题描述

有可能在C ++中创建一个自定义分配器，其工作原理如下：

Would it be possible in C++ to create a custom allocator that works simply like this:

{
    // Limit memory to 1024 KB
    ScopedMemoryPool memoryPool(1024 * 1024); 

    // From here on all heap allocations ('new', 'malloc', ...) take memory from the pool.
    // If the pool is depleted these calls result in an exception being thrown.

    // Examples:
    std::vector<int> integers(10);
    int a * = new int [10];
}

我在boost库或其他地方找不到类似的东西。

I couldn't find something like this in the boost libraries, or anywhere else.

是否有一个根本性的问题，使这不可能？

Is there a fundamental problem that makes this impossible?

推荐答案

您需要创建一个自定义分配器，您作为模板参数传入向量。这个自定义分配器本质上包装对你的池的访问，并做任何它想要的大小验证。

You would need to create a custom allocator that you pass in as a template param to vector. This custom allocator would essentially wrap the access to your pool and do whatever size validations that it wants.

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