What happen when use dynamic memory in different programming language?

Answer 1

but in c there are problems from heap such as fragmantation so what we do to overcome this?

Answer 2

Good question! You must be doing some embedded programming if you're worried about this.

What you are looking for is a memory pool. The details are more than I can get into here but the basic idea is that you allocate a block of memory (usually the size of the heap so any other allocations fail) and then assign blocks of memory to the pool. Usually implementations include FIFO block allocation or a lifetime allocation with semaphore access.

Answer 3

Here's a few (pulled from searching "c memory pool"):

http://stackoverflow.com/questions/11749386/implement-own-memory-pool

https://www.codeproject.com/articles/27487/why-to-use-memory-pool-and-how-to-implement-it

https://codereview.stackexchange.com/questions/48919/simple-memory-pool-using-no-extra-memory

Answer 4

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Answer 5

In all languages dynamic memory is allocated to the heap.

In C any allocated memory must be manually deallocated.

In C++ well designed code should deallocate memory when allocated memory falls out-of-scope (see RAII and smart pointers).

In C# and Java nearly everything is allocated to the heap and the virtual machine's garbage collector deallocates unused heap space in blocks.

Answer 6

can you please give me link to do that?
link ? code?
any help