如何为每个设备分配一块内存。

作了一个驱动程序，希望为每个设备都分配一块独立的内存。
应该在什么地方加代码？怎么加呢？

我在×××Create（）中加入
KIRQL irql;
KeAcquireSpinLock(&BufferLock,&irql);
ULONG NewBufferSize = 1024;
PVOID NewBuffer = ExAllocatePool(NonPagedPool,NewBufferSize);
if( NewBuffer == NULL)
{
DebugPrint(\"Can\'t allocate memory!\");
}
else
{
RtlZeroMemory(NewBuffer,NewBufferSize);
Buffer = (PUCHAR)NewBuffer;
BufferSize = NewBufferSize;
}
KeReleaseSpinLock(&BufferLock,irql);
结果变成了所有设备的公共内存。

请指教！

是不是在OnAddDevice中，我只是猜测

这容易，你在
typedef struct _DEVICE_EXTENSION {
...
...
UCHAR   pBuffer;
} DEVICE_EXTENSION, *PDEVICE_EXTENSION;
添加一项pBuffer，然后分配内存
KIRQL irql;
PDEVICE_EXTENSION pdx = (PDEVICE_EXTENSION) fdo->DeviceExtension;
KeAcquireSpinLock(&BufferLock,&irql);
ULONG NewBufferSize = 1024;
PVOID NewBuffer = ExAllocatePool(NonPagedPool,NewBufferSize);
if( NewBuffer == NULL)
{
DebugPrint(\"Can\'t allocate memory!\");
}
else
{
RtlZeroMemory(NewBuffer,NewBufferSize);
pdx->pBuffer = (PUCHAR)NewBuffer;
}
KeReleaseSpinLock(&BufferLock,irql);
最后记得释放内存