此IntPtr是否指向已分配的非托管内存？

Question

First, I allocate memory and get the pointer:

IntPtr pointer = Marshal.AllocHGlobal(size);

Then, I try to release the memory pointed by my pointer:

Marshal.FreeHGlobal(pointer);

But in my application it raises sometimes a fatal unknown exception with just this explaination: "a memory fragment has been damaged". I guess this is because I try to free a pointer that points to a memory block already disallocated by freeing another pointer...

My question is: using the IntPtr pointer, is there any way to check if the memory block is still allocated or has been already disallocated ?

Answer 1

释放指针的好方法是Marshal.FreeHGlobal（），因此，如果取消分配指针，这是一个逻辑问题，但是您可以在try / catch中完成它，因此如果遇到catch异常，则已经分配了指针。