如何从特定的内存位置获取结构？

Question

我将结构的内存位置存储为整数。如何检索存储在该位置的结构并在该位置创建指向该对象的指针？

Structure object;
int memLocation = &object;

Structure objectCopy = (objectAtLocation) memLocation;
Structure *objectPointer = (pointerToLocation) memLocation;

Answer 1

使用int而不是指针是非常糟糕的形式，甚至回到第一版K＆amp; R。所以你正在做的事情很糟糕。但假设你别无选择......

如果Object是Structure，则&object是Structure *。因此，适当的拆解基本上就是你的第3行：

Structure *objectPointer = (Structure *) memLocation;

Answer 2

int memLocation = (int)&object;

Structure *objectPointer = (Structure *) memLocation;
Structure object;
memcpy( &object, (void*)memlocation, sizeof( Structure ) );

Answer 3

通常是演员：

Structure *object = (Structure *)memLocation;

Answer 4

Structure *objectPointer = (Structure *)memLocation;
Structure ObjectCopy = *objectPointer;