for i in range(len(self.memory_map)): hole_start, hole_end, _ = self.memory_map[i] hole_size = hole_end - hole_start if memsize <= hole_size: self.memory_map.pop(i) if memsize < hole_size: self.memory_map.insert(i, [hole_start, hole_start + memsize, proc.pid]) self.memory_map.insert(i + 1, [hole_start + memsize, hole_end, None]) else: self.memory_map.insert(i, [hole_start, hole_end, proc.pid]) break
时间: 2024-02-14 21:23:53 浏览: 27
这段代码看起来像是一个内存管理器的实现,它的作用是为一个进程分配一段内存空间。它首先遍历了一个内存映射表(memory_map),这个表记录了所有空闲的内存空间。然后它找到一个空间大小大于等于进程需要的大小(memsize)的空闲空间,并将其从内存映射表中删除。如果找到的空闲空间大小等于进程需要的大小,那么就直接将整个空闲空间分配给进程;否则,就将这个空闲空间分成两部分,一部分分配给进程,另一部分仍然是空闲的,需要重新加入内存映射表中。最后,这个函数返回成功分配的内存空间的起始地址。
相关问题
for i in range(len(self.memory_map)): hole_start, hole_end, proc_id = self.memory_map[i] if proc_id == proc.pid: self.memory_map.pop(i) if i > 0 and self.memory_map[i - 1][2] == None: hole_start = self.memory_map.pop(i - 1)[0] hole_end = self.memory_map.pop(i - 1)[1] self.memory_map.insert(i - 1, [hole_start, hole_end, None]) if i < len(self.memory_map) and self.memory_map[i][2] == None: hole_start = self.memory_map.pop(i)[0] hole_end = self.memory_map.pop(i)[1] self.memory_map.insert(i, [hole_start, hole_end, None]) break
这段代码看起来像是一个内存管理器中的某个方法,其中包含了对一个进程的内存分配和释放操作。大体流程是遍历一个内存映射列表,找到对应进程的记录,将其从列表中删除。然后,如果被删除的记录前后都是空闲块,则将它们合并成一个更大的空闲块。最后跳出循环,完成操作。具体实现细节需要结合上下文来理解,这段代码还需要更多的信息才能够准确地评价。
class TimeWindowSequence(Sequence): def __init__(self, x, y, batch_size, window_size): self.x = x self.y = y self.batch_size = batch_size self.window_size = window_size self.window_count = int(np.ceil(x.shape[0] / window_size)) def __len__(self): return int(np.ceil(self.x.shape[0] / self.batch_size)) def __getitem__(self, idx): batch_x = np.zeros((self.batch_size, self.window_size, self.x.shape[1])) batch_y = np.zeros((self.batch_size, self.y.shape[1])) for i in range(self.batch_size): j = idx * self.batch_size + i if j >= self.window_count: break window_x = self.x[j*self.window_size:(j+1)*self.window_size, :] window_y = self.y[j*self.window_size:(j+1)*self.window_size, :] batch_x[i, :window_x.shape[0], :] = window_x batch_y[i, :] = window_y[-1, :] return batch_x, batch_y出现
这段代码中似乎缺少了一个缩进,导致 `return` 语句在 `for` 循环内部。可以尝试将 `return` 语句缩进到 `for` 循环外部,如下所示:
```
class TimeWindowSequence(Sequence):
def __init__(self, x, y, batch_size, window_size):
self.x = x
self.y = y
self.batch_size = batch_size
self.window_size = window_size
self.window_count = int(np.ceil(x.shape[0] / window_size))
def __len__(self):
return int(np.ceil(self.x.shape[0] / self.batch_size))
def __getitem__(self, idx):
batch_x = np.zeros((self.batch_size, self.window_size, self.x.shape[1]))
batch_y = np.zeros((self.batch_size, self.y.shape[1]))
for i in range(self.batch_size):
j = idx * self.batch_size + i
if j >= self.window_count:
break
window_x = self.x[j*self.window_size:(j+1)*self.window_size, :]
window_y = self.y[j*self.window_size:(j+1)*self.window_size, :]
batch_x[i, :window_x.shape[0], :] = window_x
batch_y[i, :] = window_y[-1, :]
return batch_x, batch_y
```
这样应该就可以解决这个问题了。