使用二叉树改写class MemoryManager: def init(self, allocator): self.allocator = allocator def allocate(self, process, request_size): memory_view = self.allocator.memory_view() best_fit_block = None best_fit_size = float('inf') for i in range(len(memory_view)): if memory_view[i] is None: block_size = 0 j = i while j < len(memory_view) and memory_view[j] is None: block_size += 1 j += 1 if block_size >= request_size and block_size < best_fit_size: best_fit_block = i best_fit_size = block_size if best_fit_block is not None: block_start = best_fit_block self.allocator.allocate_memory(block_start, request_size, process) else: raise AssertionError('allocation failed')

好的，我可以给你一个使用二叉树改写的示例代码，但需要注意的是，由于你没有提供 allocator 类的具体实现，所以以下代码仅展示了如何使用二叉树来管理内存块的分配和释放，具体实现需要根据你的 allocator 类来进行修改。

class MemoryBlock:
    def __init__(self, start, size):
        self.start = start
        self.size = size
        self.left = None
        self.right = None
        self.parent = None

class MemoryManager:
    def __init__(self, allocator):
        self.allocator = allocator
        self.root = MemoryBlock(0, self.allocator.size)
    
    def allocate(self, process, request_size):
        block = self.find_best_fit_block(self.root, request_size)
        if block is None:
            raise AssertionError('allocation failed')
        self.split_block(block, request_size)
        self.allocator.allocate_memory(block.start, request_size, process)
    
    def deallocate(self, process):
        # TODO: implement deallocation logic
    
    def find_best_fit_block(self, block, request_size):
        if block is None:
            return None
        if block.size < request_size:
            return None
        if block.left is None and block.right is None:
            return block
        left_block = self.find_best_fit_block(block.left, request_size)
        right_block = self.find_best_fit_block(block.right, request_size)
        if left_block is None:
            return right_block
        if right_block is None:
            return left_block
        if left_block.size < right_block.size:
            return left_block
        else:
            return right_block
    
    def split_block(self, block, request_size):
        if block.size == request_size:
            return
        if block.size < request_size * 2:
            return
        left_size = block.size // 2
        right_size = block.size - left_size
        block.left = MemoryBlock(block.start, left_size)
        block.right = MemoryBlock(block.start + left_size, right_size)
        block.left.parent = block
        block.right.parent = block
        self.split_block(block.left, request_size)
        self.split_block(block.right, request_size)

这段代码中，我们定义了一个 MemoryBlock 类来表示内存块，每个 MemoryBlock 对象有一个 start 属性表示该内存块的起始地址，一个 size 属性表示该内存块的大小，以及三个指针 left、right 和 parent 分别指向该内存块的左子节点、右子节点和父节点。我们使用一个 MemoryManager 类来管理内存块的分配和释放，该类的构造函数接受一个 allocator 参数，用于初始化内存池的大小和起始地址。在 allocate 方法中，我们使用 find_best_fit_block 方法来查找最合适的内存块，然后使用 split_block 方法将该内存块分裂成两个子节点，最后将该内存块的起始地址和大小传递给 allocator 对象的 allocate_memory 方法来进行内存分配。在 deallocate 方法中，我们可以使用类似的方式来查找需要释放的内存块，并将该内存块的状态设置为未分配。