is there stack size in iphone?

Question

Every RAM must have stack and heap (like CS,ES,DS,SS 4 segments).but is there like stack size in iphone,is only heap available?some tutorial say when we increase stack size

Answer 1

RAM does not have stack and heap (these are program use constructs and not part of the memory physically), nor do the Intel segment registers apply to ARM.

An application's thread, since it is a C application, has a stack. The stack size is bounded on the device, and in most cases cannot exceed a certain size (1MB for the main thread on iPhone OS), nor can it be shrunk.

Heap is also limited. The only way your stack size can influence the available heap is by creating threads, where the new stacks will occupy memory which could be used by the heap allocator. On iPhone OS, the minimum stack size is 16KB. For more information, read the threading documentation.