What and where are the stack and heap? - Stack Overflow
2008年9月17日 · The Heap. The heap is a region of your computer's memory that is not managed automatically for you, and is not as tightly managed by the CPU. It is a more free-floating region of memory (and is larger). To allocate memory on the heap, you must use malloc() or calloc(), which are built-in C functions.
Why are two different concepts both called "heap"? [duplicate]
Heap the data structure dates back to the mid-60s; heap the memory pool, the early-70s. The term heap (meaning memory pool) was used at least as early as 1971 by Wijngaarden in discussions of Algol. Possibly the earliest use of heap as a data structure is found seven years earlier in Williams, J. W. J. 1964.
malloc - What is a Memory Heap? - Stack Overflow
2010年2月22日 · A memory heap is a location in memory where memory may be allocated at random access. Unlike the stack where memory is allocated and released in a very defined order, individual data elements allocated on the heap are typically released in ways which is asynchronous from one another. Any such data element is freed when the program explicitly ...
How can building a heap be O (n) time complexity? - Stack Overflow
2012年3月18日 · A min heap is also useful; for example, when retrieving items with integer keys in ascending order or strings in alphabetical order. The principles are exactly the same; simply switch the sort order. The heap property specifies that each node in a binary heap must be at least as large as both of its children. In particular, this implies that ...
Difference between priority queue and a heap - Stack Overflow
2013年9月25日 · The C++ Standard Template Library provides the make_heap, push_heap and pop_heap algorithms for heaps (usually implemented as binary heaps), which operate on arbitrary random access iterators. It treats the iterators as a reference to an array, and uses the array-to-heap conversion.
Stack, Static, and Heap in C++ - Stack Overflow
2015年11月2日 · The heap is a bunch of memory that can be used dynamically. If you want 4kb for an object then the dynamic allocator will look through its list of free space in the heap, pick out a 4kb chunk, and give it to you. Generally, the dynamic memory allocator (malloc, new, et c.) starts at the end of memory and works backwards.
Why is memory allocation on heap MUCH slower than on stack?
On a heap on the other hand, you can remove items out of order. And as long as you don't move the other items around afterwards in memory (as some garbage collected heaps do), your heap then has "hole" in the middle. I.e. if you add A,B,C to a heap and remove B, your heap looks like this in memory: A _ C where _ is a block of unused (free) memory.
Heap corruption: What could the cause be? - Stack Overflow
"Setting the HEAP_NO_SERIALIZE value eliminates mutual exclusion on the heap. Without serialization, two or more threads that use the same heap handle might attempt to allocate or free memory simultaneously, likely causing corruption in the heap." so I think due to the memory corruption in the heap, the node got crashed.
When should I allocate on the heap? (C++) - Stack Overflow
2014年10月6日 · Normally however, you very seldomly should touch the heap directly, but normally use objects that manage some heap memory for you (and the object possibly lives on the stack or as member of another object - where you then don't care where the other object lives) To give some example code:
c++ - When vectors are allocated, do they use memory on the …
2011年11月7日 · No. Same as above, except the vector class will be on the heap as well. vector<Type*> vect; //vect will be on stack and Type* will be on heap. vect will be on the stack, its items (pointers to Type) will be on the heap, and you can't tell where will be the Types the pointers point to. Could be on stack, could be on the heap, could be in the ...