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C dynamic memory allocation refers to performing manual memory management for dynamic memory allocation in the C programming language via a group of functions in the C standard library, namely malloc, realloc, calloc, aligned_alloc and free. [1] [2] [3]
Since standard C++ subsumes the C standard library, the C dynamic memory allocation routines malloc, calloc, realloc and free are also available to C++ programmers. The use of these routines is discouraged for most uses, since they do not perform object initialization and destruction.
C uses the malloc function; C++ and Java use the new operator; and many other languages (such as Python) allocate all objects from the free store. Determining when an object ought to be created ( object creation ) is generally trivial and unproblematic, though techniques such as object pools mean an object may be created before immediate use.
Memory pools allow memory allocation with constant execution time. The memory release for thousands of objects in a pool is just one operation, not one by one if malloc is used to allocate memory for each object. Memory pools can be grouped in hierarchical tree structures, which is suitable for special programming structures like loops and ...
malloc_default_zone() returns the zone from which malloc() etc. allocate memory, so, at least on Darwin, I guess you could say that stuff is allocated from a "zone". However, none of that is a reason to use "zone" here, unless it's commonly used in platforms that aren't Darwin-based.)
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In computer science, region-based memory management is a type of memory management in which each allocated object is assigned to a region.A region, also called a zone, arena, area, or memory context, is a collection of allocated objects that can be efficiently reallocated or deallocated all at once.
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