Menu
It seems like Box.clone() copies the heap memory. As I know, Box will get destructed after it gets out of its scope, as well as the memory area it is pointing to.
So I'd like to ask a way to create more than one Box object pointing to the same memory area.
678
Heap memory is used by all the parts of the application whereas stack memory is used only by one thread of execution. Whenever an object is created, it's always stored in the Heap space and stack memory contains the reference to it.
Stack memory allocation is considered safer as compared to heap memory allocation because the data stored can only be access by owner thread. Memory allocation and de-allocation is faster as compared to Heap-memory allocation.
In a word, yes, it can. While the heap can grow and shrink, it does have lower and upper bounds (usually defined by the -Xms and -Xmx arguments, unless you choose to se the defaults). If the heap size is exceeded, the allocation will fail and you'll get a java. lang.
The Heap Space contains all objects are created, but Stack contains any reference to those objects. Objects stored in the Heap can be accessed throughout the application. Primitive local variables are only accessed the Stack Memory blocks that contain their methods.
By definition, you shall not.
Box is explicitly created with the assumption that it is the sole owner of the object inside.
When multiple owners are required, you can use instead Rc and Arc, those are reference-counted owners and the object will only be dropped when the last owner is destroyed.
Note, however, that they are not without downsides:
Cell, RefCell or some Mutex for example,
152
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
